SG200HX-US - Inverter Sungrow - Free user manual and instructions

Product Type	PV Grid-Connected Inverter
Brand	Sungrow
Model	SG200HX-US
Dimensions (W x H x D)	1165 x 870 x 361 mm (45.9 x 34.3 x 14.2 in)
Weight	≤ 120 kg (≤ 265 lbs)
Rated AC Power	200 kVA @ 40°C
Max AC Output Current	193 A
Nominal AC Voltage	3/PE, 600 V
Max PV Input Voltage	1500 V
MPP Voltage Range	500 V – 1500 V
Number of MPP Trackers	12
Max Efficiency	98.9%
Cooling Method	Smart forced air cooling
Protection Rating	IP66 (NEMA 4X)
Communication Interfaces	RS485, SunSpec, Modbus, Bluetooth+App
Safety Features	DC reverse protection, AC short circuit protection, leakage current protection, ground fault monitoring, surge protection (DC Type II / AC Type II)
Operating Temperature Range	-30°C to 60°C (-22°F to 140°F)
Storage Temperature Range	-40°C to 70°C (-40°F to 158°F)
Relative Humidity	0% – 100% (non-condensing)
Max Operating Altitude	4000 m (derating above 3000 m)
Compliance	UL1741, UL62109-1, CSA C22.2 No.107.1-16, IEEE1547-2018, IEEE1547.1-2020, UL1741 SA/SB, California Rule21, FCC Part 15 Class A
Warranty	Refer to quality assurance section; contact Sungrow for details
User Manual Languages	English (and many others available on request)

Frequently Asked Questions - SG200HX-US Sungrow

What is the maximum PV input voltage for the SG200HX-US inverter?

The maximum PV input voltage is 1500 V. Ensure the open-circuit voltage of the PV strings never exceeds this limit.

How many MPPT inputs does the inverter have?

The inverter has 12 independent MPPT inputs, each capable of handling up to two PV strings. For optimal performance, connect strings with similar characteristics to the same MPPT.

What is the protection rating of the inverter?

The inverter has an IP66 (NEMA 4X) rating, making it suitable for both indoor and outdoor installation, with protection against dust and water jets.

Can I install the inverter in a residential area?

The inverter produces noise during operation. It is not recommended for residential areas unless it is at least 25 meters away or noise mitigation measures are taken.

How do I clean the air inlet and outlet of the inverter?

Use a soft brush or vacuum cleaner to remove dust and debris from the air inlet and outlet. Perform this every six months to a year, depending on environmental dust levels.

What should I do if the inverter displays a fault code?

Refer to the troubleshooting section in the manual (pages 99-107). Common faults include grid voltage/frequency deviations, ground faults, or electric arc faults. Follow the corrective measures listed for each fault code. If the issue persists, contact Sungrow Customer Service.

Is it safe to touch the inverter enclosure during operation?

No, the inverter enclosure can become very hot (over 60°C) and may carry high voltages. Do not touch it during operation. Wait at least 5 minutes after disconnecting power and ensure it has cooled down before any physical contact.

What type of AC circuit breaker is required for the inverter?

An AC circuit breaker must be installed on the AC side. The specifications should comply with local regulations and the inverter's technical data. Do not connect any load between the inverter and the breaker except for the tracking axis.

Can I use aluminum cables for the AC connection?

Yes, aluminum cables can be used, but you must use a copper-to-aluminum adapter terminal to prevent electrochemical corrosion. Ensure the terminal is compatible with the copper bar.

How do I dispose of the inverter at the end of its life?

Dispose of the inverter in accordance with local electronic waste regulations. Do not dispose of it with household waste. Some parts may be recyclable. Contact a certified recycling facility.

USER MANUAL SG200HX-US Sungrow

PV Grid-Connected Inverter

SG200HX-US

Exterior view of a metallic industrial enclosure with mounting feet and a label 'SUNARISH' on the front panel (no other text or symbols visible)

All Rights Reserved

All Rights Reserved

No part of this document can be reproduced in any form or by any means without the prior written permission of Sungrow Power Supply Co., Ltd (hereinafter "SUNGROW").

Trademarks

SUNGROW and other Sungrow trademarks used in this manual are owned by SUNGROW.

All other trademarks or registered trademarks mentioned in this manual are owned by their respective owners.

Software Licenses

• It is prohibited to use data contained in firmware or software developed by SUNGROW, in part or in full, for commercial purposes by any means.
• It is prohibited to perform reverse engineering, cracking, or any other operations that compromise the original program design of the software developed by SUNGROW.

About This Manual

The manual mainly contains the product information, as well as guidelines for installation, operation, and maintenance. The manual does not include complete information about the photovoltaic (PV) system. Readers can get additional information at www.sungrowpower.com or on the webpage of the respective component manufacturer.

Target Group

This manual is intended for professional technicians who are responsible for installation, operation, and maintenance of inverters, and users who need to check inverter parameters.

The inverter must only be installed by professional technicians. The professional technician is required to meet the following requirements:

• Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
• Have received professional training related to the installation and commissioning of electrical equipment.
• Be able to quickly respond to hazards or emergencies that occur during installation and commissioning.
• Be familiar with local standards and relevant safety regulations of electrical systems.
• Read this manual thoroughly and understand the safety instructions related to operations.

How to Use This Manual

Please read this manual carefully before using the product and keep it properly at a place for easy access.

All contents, pictures, marks, and symbols in this manual are owned by SUNGROW. No part of this document may be reprinted by the non-internal staff of SUNGROW without written authorization.

Contents of this manual may be periodically updated or revised, and the actual product purchased shall prevail. Users can obtain the latest manual from support.sungrowpower.com or sales channels.

Security Declaration

For details on the product's network security vulnerability response process and vulnerability disclosure, please visit the following website: https://en.sungrowpower.com/security-vulnerability-management.

For more information on network security, please refer to the user manual of the communication module or the Data Logger that comes with the product.

Symbols

This manual contains important safety instructions, which are highlighted with the following symbols, to ensure personal and property safety during usage, or to help optimize the product performance in an efficient way.

Please carefully understand the meaning of these warning symbols to better use the manual.

! DANGER

Indicates high-risk potential hazards that, if not avoided, may lead to death or serious injury.

WARNING

Indicates moderate-risk potential hazards that, if not avoided, may lead to death or serious injury.

CAUTION

Indicates low-risk potential hazards that, if not avoided, may lead to minor or moderate injury.

NOTICE

Indicates potential risks that, if not avoided, may lead to device malfunctions or financial losses.

"NOTE" indicates additional information, emphasized contents or tips that may be helpful, e.g., to help you solve problems or save time.

Contents

All Rights Reserved....

About This Manual....II

1 Safety Instructions.... 1

1.1 Unpacking and Inspection....2
1.2 Installation Safety.... 3
1.3 Electrical Connection Safety....3
1.4 Operation Safety....5
1.5 Maintenance Safety....6
1.6 Disposal Safety....7

2 Product Description....8

2.1 System Introduction......8
2.2 Product Introduction....9
2.3 Symbols on Product.... 10
2.4 LED Indicator....11
2.5 DC Switch....12
2.6 Circuit Diagram....12
2.7 Function Description.... 13

3 Unpacking and Storage....15

3.1 Unpacking and Inspection.... 15
3.2 Unpacking Steps....16
3.3 Inverter Storage....17

4 Mechanical Mounting....19

4.1 Safety During Mounting....19
4.2 Location Requirements....20

4.2.1 Installation Environment Requirements....21
4.2.2 Carrier Requirements.... 23
4.2.3 Angle Requirements....23
4.2.4 Installation Space Requirements....25

4.3 Installation Tools....28
4.4 Moving Inverter....30

4.4.1 Manual Transport....30
4.4.2 Hoisting Transport....31

4.5 Installing Mounting-bracket....33

4.5.1 Bracket-Mounted Installation....34
4.5.2 Pole-Mounting....36

4.6 Installing the Inverter....39

5 Electrical Connection....41

5.1 Safety Instructions....41
5.2 Terminal Description....43
5.3 Electrical Connection Overview....44
5.4 Crimp OT/DT terminal.... 46
5.5 External Protective Grounding Connection.... 47

5.5.1 External Protective Grounding Requirements.... 48
5.5.2 Connection Procedure....48

5.6 AC Cable Connection....49

5.6.1 AC Side Requirements....49
5.6.2 Requirements for OT/DT Terminal....52
5.6.3 Connection Procedure....52

5.7 DC Cable Connection....56

5.7.1 PV Input Configuration....58
5.7.2 Assembling PV Connectors....59
5.7.3 Installing PV Connector....60

5.8 RS485 Connection(COM1)....62

5.8.1 Interface Description....62
5.8.2 RS485 Communication System....63
5.8.3 Connection Procedure....63

5.9 PLC Communication Connection....67

5.9.1 Application Scenarios....67
5.9.2 PLC Wiring Rules....69
5.9.3 PLC Wiring....73

6 Commissioning....76

6.1 Inspection Before Commissioning....76

6.2 Commissioning Procedure....76

7 iSolarCloud App....78

7.1 Brief Introduction....78
7.2 Installing App....78
7.3 Login....79

7.3.1 Requirements.... 79
7.3.2 Login Procedure....79

7.4 Function Overview....82
7.5 Home....82
7.6 Run Information....84
7.7 Records....86
7.8 More....88

7.8.1 System Parameters....88
7.8.2 Operation Parameters....89
7.8.3 Power Regulation Parameters....90
7.8.4 Communication Parameters....96
7.8.5 Firmware Update....97
7.8.6 Password Changing....98

8 Troubleshooting and Maintenance....99

8.1 Troubleshooting....99
8.2 Maintenance.... 107

8.2.1 Maintenance Notices....107
8.2.2 Disconnecting the Inverter....108
8.2.3 Routine Maintenance....108
8.2.4 Cleaning Air Inlet and Outlet....109
8.2.5 Fan Maintenance....109
8.2.6 Heat Sink Cleaning.... 112

8.3 Inverter Disposal....113

8.3.1 Dismantling the Inverter.... 113
8.3.2 Disposal of Inverter.... 114

9 Appendix....115

9.1 Technical Data....115
9.2 Wring Distance of DI Dry Contact....117
9.3 Quality Assurance....118

9.4 Contact Information.... 119

1 Safety Instructions

When installing, commissioning, operating, and maintaining the product, strictly observe the labels on the product and the safety requirements in the manual. Incorrect operation or work may cause:

• Injury or death to the operator or a third party.
  • Damage to the product and other properties.

WARNING

• Do not perform any operation on the product (including but not limited to, handling, installing, powering on, or maintaining the product, performing electrical connection, and working at heights) in harsh weather conditions, such as thunder and lightning, rain, snow, and Level 6 or stronger winds. SUNGROW shall not be held liable for any damage to the device due to force majeure, such as earthquakes, floods, volcanic eruptions, mudslides, lightning strikes, fires, wars, armed conflicts, typhoons, hurricanes, tornadoes, and other extreme weathers.
• In case of fire, evacuate from the building or product area and call the fire alarm. Re-entry into the burning area is strictly prohibited under any circumstances.

NOTICE

• Tighten the screws with the specified torque using tools when fastening the product and terminals. Otherwise, the product may be damaged. And the damage caused is not covered by the warranty.
• Learn how to use tools correctly before using them to avoid hurting people or damaging the device.
• Maintain the device with sufficient knowledge of this manual and use proper tools.

• The safety instructions in this manual are only supplements and cannot cover all the precautions that should be followed. Perform operations considering actual onsite conditions.
• SUNGROW shall not be held liable for any damage caused by violation of general safety operation requirements, general safety standards, or any safety instruction in this manual.
• When installing, operating, and maintaining the product, comply with local laws and regulations. The safety precautions in this manual are only supplements to local laws and regulations.
• During the product transport, installation, wiring, maintenance, etc., the materials and tools prepared by users must meet the requirements of applicable local laws and regulations, safety standards, and other specifications. SUNGROW shall not be held liable for any damage to the product caused by the adoption of materials and tools that fail to meet the above-mentioned requirements.
• Operations on the product, including but not limited to, handling, installing, wiring, powering on, maintenance, and use of the product, must not be performed by unqualified personnel. SUNGROW shall not be held liable for any damage to the product resulting from operations done by unqualified personnel.
• Where the transport of the product is arranged by users, SUNGROW shall not be held liable for any damage to the product that is caused by users themselves or the third-party transport service providers designated by the users.
• SUNGROW shall not be held liable for any damage to the product caused by the negligence, intent, fault, improper operation, and other behaviors of users or third-party organizations.
• SUNGROW shall not be held liable for any damage to the product arising from reasons unrelated to SUNGROW.

1.1 Unpacking and Inspection

WARNING

• Check all safety signs, warning labels and nameplates on devices.
• The safety signs, warning labels and nameplates must be clearly visible and cannot be removed or covered before the device is decommissioned.

NOTICE

After receiving the product, check whether the appearance and structural parts of the device are damaged, and check whether the packing list is consistent with the actual ordered product. If there are problems with the above inspection items, do not install the device and contact your distributor first. If the problem persists, contact SUNGROW in time.

1.2 Installation Safety

! DANGER

• Make sure there is no electrical connection before installation.
• Before drilling, avoid the water and electricity wiring in the wall.

CAUTION

Improper installation may cause personal injury!

• If the product supports hoisting transport and is hoisted by hoisting tools, no one is allowed to stay under the product.
• When moving the product, be aware of the product weight and keep the balance to prevent it from tilting or falling.

NOTICE

Before operating the product, must check and ensure that tools to be used have been maintained regularly.

1.3 Electrical Connection Safety

DANGER

• Before electrical connections, please make sure that the inverter is not damaged, otherwise it may cause danger!
• Before electrical connections, please make sure that the inverter switch and all switches connected to the inverter are set to "OFF", otherwise electric shock may occur!

! DANGER

The PV string will generate lethal high voltage when exposed to sunlight.

• Operators must wear proper personal protective equipment during electrical connections.
• Must ensure that cables are voltage-free with a measuring instrument before touching DC cables.
• Respect all safety instructions listed in relevant documents about PV strings.
• The inverter must not be connected to a PV string that requires positive or negative grounding.

! DANGER

Danger to life due to a high voltage inside the inverter!

• Be sure to use special insulation tools during cable connections.
• Note and observe the warning labels on the product, and perform operations strictly following the safety instructions.
• Respect all safety instructions listed in this manual and other pertinent documents.

WARNING

Damage to the product caused by incorrect wiring is not covered by the warranty.

• Electrical connection must be performed by professionals.
- All cables used in the PV generation system must be firmly attached, properly insulated, and adequately dimensioned.

WARNING

• Check the positive and negative polarity of the PV strings, and connect the PV connectors to corresponding terminals only after ensuring polarity correctness.
• During the installation and operation of the inverter, please ensure that the positive or negative poles of PV strings do not short-circuit to the ground. Otherwise, an AC or DC short-circuit may occur, resulting in equipment damage. The damage caused by this is not covered by the warranty.
• Do not connect any load between the inverter and the AC circuit breaker directly connected to it, so as to prevent the switch from tripping by mistake.
• Determine the specifications of AC circuit breakers strictly in compliance with the applicable local laws and regulations and safety standards or the recommendation by SUNGROW. Otherwise, the switch may not open in time in the event of something abnormal, which may then lead to safety incidents.

NOTICE

Comply with the safety instructions related to PV strings and the regulations related to the local grid.

1.4 Operation Safety

! DANGER

When routing cables, ensure a distance of at least 30 mm between the cables and heat-generating components or areas to protect the insulation layer of cables from aging and damage.

! DANGER

When the product is working:

• Do not touch the product enclosure.
• It is strictly forbidden to plug and unplug any connector on the inverter.
• Do not touch any wiring terminal of the inverter. Otherwise, electric shock may occur.
• Do not disassemble any parts of the inverter. Otherwise, electric shock may occur.
• It is strictly forbidden to touch any hot parts of the inverter (such as the heat sink). Otherwise, it may cause burns.
• Do not connect or remove any PV string or any PV module in a string. Otherwise, electric shock may occur.

Do not take other actions, such as setting parameters or cutting off power, during the process of inverter firmware update, to avoid update failure.

1.5 Maintenance Safety

! DANGER

Risk of inverter damage or personal injury due to incorrect service!

• Before maintenance, disconnect the AC circuit breaker on the grid side and then the DC switch. If a fault that may cause personal injury or device damage is found before maintenance, disconnect the AC circuit breaker and wait until the night before operating the DC switch. Otherwise, a fire inside the product or an explosion may occur, causing personal injuries.
• After the inverter is powered off for 5 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.
• Even if the inverter is shut down, it may still be hot and cause burns. Wear protective gloves before operating the inverter after it cools down.

! DANGER

Touching the power grid or the contact points and terminals on the inverter connected to the power grid may lead to electric shock!

- The power grid side may generate voltage. Always use a standard voltmeter to ensure that there is no voltage before touching.

CAUTION

To prevent misuse or accidents caused by unrelated personnel, post prominent warning signs or demarcate safety warning areas around the product.

NOTICE

To avoid the risk of electric shock, do not perform any other maintenance operations beyond this manual. If necessary, contact SUNGROW for maintenance. Otherwise, the losses caused is not covered by the warranty.

NOTICE

• If the paint on the inverter enclosure falls or rusts, repair it in time. Otherwise, the inverter performance may be affected.
• Do not use cleaning agents to clean the inverter. Otherwise, the inverter may be damaged, and the loss caused is not covered by the warranty.
• As the inverter contains no parts that can be maintained, never open the enclosure of the inverter or replace any internal components without authorization. Otherwise, the loss caused is not covered by the warranty.
• Do not open the maintenance door in rainy or snowy weather. If it is inevitable, take proper protective measures to avoid the ingress of rainwater and snow into the maintenance compartment; otherwise, the product's operation may be affected.
• Before closing the maintenance door, check whether there is any object left inside the maintenance compartment, such as screws, tools, etc.
• It is recommended for users to use cable sheathing to protect the AC cable. If the cable sheathing is used, make sure it is positioned inside the maintenance compartment.

1.6 Disposal Safety

WARNING

Please scrap the product in accordance with relevant local regulations and standards to avoid property losses or casualties.

2 Product Description

2.1 System Introduction

The inverter is a transformerless 3-phase PV grid-connected inverter. As an integral component in the PV power system, the inverter is designed to convert the direct current power generated from the PV modules into grid-compatible AC current and to feed the AC current into the utility grid.

WARNING

Do not connect any local load between the inverter and the AC circuit breaker except for the tracking axis.

NOTICE

• When designing the system, ensure that the operating ranges of all devices that are connected to the inverter meet the requirements of the inverter.
• The inverter is only applicable to the scenarios described in the manual and cannot be used in other situations.

The intended usage of the inverter is illustrated in the following figure.

graph LR
    A["Input Grid"] --> B["Device"]
    B --> C["Electrical Tower"]
    C --> D["Power Transmission Tower"]

figure 2-1 Inverter Application in PV Power System

Item Description Note

A PV strings	Monocrystalline silicon, polycrystalline silicon and thin-film without grounding
B Inverter SG200HX-US
C Transformer	Raises the output voltage of the inverter to a level that meets the requirements of the grid
D Utility grid	The grid form supported by the inverter is shown in the figure below

2.2 Product Introduction

Model Description

The model description is as follows.

graph TD
    A["SG"] --> B["200"]
    B --> C["HX-US"]
    C --> D["Code of Product Series"]
    C --> E["Code of Power Level"]
    C --> F["Photovoltaic Grid-connected Inverter"]

Appearance

The following figure shows the appearance of the inverter.

figure 2-2 Appearance

The image shown here is for reference only. The actual product received may differ.

No. Name Description

1 LED indicator To indicate the current working state of the inverter.
2 AC junction box	To connect AC cable and tracking system power cable in this area.

No. Name Description

3	External protective grounding terminals	2, use at least one of them to ground the inverter.
4	Bottom handles 2, used to move the inverter.
5	Mounting lugs 4, used to hang the inverter onto the mounting-bracket.
6	Wiring area	DC switches, DC terminals, and communication terminals.For details, refer to 5.2 Terminal Description.
7	Labels	To clearly identify the product, including nameplate, warning symbols and QR code.

Dimensions

The following figure shows the dimensions of the inverter.

figure 2-3 Product Dimensions(in mm)

Weight

Model Weight

SG200HX-US ≤ 120 kg (≤ 265 lbs)

2.3 Symbols on Product

Symbol Explanation

Do not dispose of the inverter together with household waste.

Read the user manual before maintenance!

Symbol Explanation
	CSA mark of conformity.
	CE mark of conformity.EU/EEA Importer
	Disconnect the inverter from all the external power sources before maintenance!
	Burn danger due to the hot surface that may exceed 60°C.
	Danger to life due to high voltages!Do not touch live parts for 5 minutes after disconnection from the power sources.Only qualified personnel can open and maintain the inverter.
	External protective grounding terminal.

2.4 LED Indicator

The LED indicator on the front of the inverter indicates the working state of the inverter.

table 2-1 LED Indicator State Description

LED Color State Definition
Blue	On	The device is connected to the grid and operating nor-mally.
	Fast blink (Period: 0.2s)	The Bluetooth connection is established, and there is data communication.No system fault occurs.
	Slow blink (Period: 2s)	The device is in standby or startup state (not feeding power into the grid).
	Slow blink once, fast blink three times	The inverter is performing PID recovery.

LED Color State Definition

Red

On A fault occurs and the device cannot connect to the grid.

Blink

The Bluetooth connection is established, data communication in process, and a system fault occurs.

Gray

OFF Both the AC and DC sides are powered down.

WARNING

Voltage may still be present in AC side circuits after the indicator is off. Pay attention to the electricity safety when operating.

2.5 DC Switch

The inverter is equipped with four DC switches which can safely disconnect it from PV strings. Each switch controls the DC terminals in the area where the switch is located.

Technical line drawing of a mechanical assembly with multiple circular components and directional arrows (no text or symbols)

2.6 Circuit Diagram

The following figure shows the main circuit of the inverter.

graph LR
    A["DC1"] --> B["Current Monitoring"]
    C["DCn"] --> D["DC switch"]
    B --> E["DC SPD"]
    D --> E
    E --> F["DC EMI"]
    F --> G["MPPT (1)"]
    F --> H["MPPT (n)"]
    G --> I["DC Bus"]
    H --> I
    I --> J["Inverter circuit"]
    J --> K["AC Filter"]
    J --> L["AC Relay"]
    K --> M["AC EMI"]
    L --> M
    M --> N["L1"]
    M --> O["L2"]
    M --> P["L3"]
    N --> Q["PE"]
    O --> Q
    P --> Q

figure 2-4 Circuit Diagram

• DC Switches can safely disconnect the PV input when necessary to ensure the safe operation of the inverter and the safety of personnel.
• The DC SPD provides a discharge circuit for the DC side overvoltage to prevent it from damaging the internal circuits of the inverter.
• EMI filters can filter out the electromagnetic interference inside the inverter to ensure that the inverter meets the requirements of electromagnetic compatibility standards.
• The MPPT is used to ensure a maximum power from PV arrays at different PV input conditions.
• The Inverter Circuit converts the DC power into grid-compliant AC power and feeds it into the grid.
• The AC filter filters the output AC component of high frequency to ensure that the output current meets the grid requirements.
• The AC relay isolates the AC output of the inverter from the grid, making the inverter safe from the grid in case of inverter failure or grid failure.
• The AC SPD provides a discharge circuit for the AC side overvoltage to prevent it from damaging the internal circuits of the inverter.

! DANGER

If the lightning level exceeds the protection level of the product, surge protection and overvoltage protection may fail, resulting in electric shock and fatal injury!

2.7 Function Description

The inverter is equipped with the following functions:

Conversion Function

The inverter converts the DC current into grid-compatible AC current and feeds the AC current into the grid.

Data Storage

The inverter logs running information, error records, etc.

Parameter Configuration

The inverter provides various settable parameters. Users can set parameters via the App to meet the requirements and optimize the performance.

Communication Interface

The inverter is designed with standard RS485 communication interfaces.

The standard RS485 communication interfaces are used to establish communication connection with monitoring devices and upload monitoring data by using communication cables. After communication connection is established, users can view inverter information or set inverter parameters through the iSolarCloud.

Protection Function

The protective functions are integrated in the inverter, including anti-island protection, LVRT, DC reverse connection protection, AC short circuit protection, leakage current protection, surge protection, etc.

3 Unpacking and Storage

3.1 Unpacking and Inspection

The product is thoroughly tested and strictly inspected before delivery. Nonetheless, damage may still occur during shipping. For this reason, please conduct a thorough inspection after receiving the product.

• Check the packing case for any visible damage.
• Check the scope of delivery for completeness according to the packing list.
• Check the inner contents for damage after unpacking.

Contact SUNGROW or the transport company in case of any damage or incompleteness, and provide photos to facilitate services.

Do not dispose of the original packing case. It is recommended to store the device in the original packing case when the product is decommissioned.

NOTICE

- After receiving the product, check whether the appearance and structural parts of the device are damaged, and check whether the packing list is consistent with the actual ordered product. If there are problems with the above inspection items, do not install the device and contact your distributor first. If the problem persists, contact SUNGROW in time.

- If any tool is used for unpacking, be careful not to damage the product.

3.2 Unpacking Steps

step 1 Use a utility knife to cut the packing tape. Remove horizontal and vertical paper angle beads.

Isometric diagram of a modular building structure with wooden supports and a camera on top (no text or symbols)

step 2 Remove the packing box upwards.

Illustration of two hands holding a wooden pallet with a blue upward arrow on top (no text or symbols)

step 3 Remove the surrounding paper angle beads.

Architectural diagram of a two-story building with wooden framing and internal structure, showing structural elements and arrows indicating orientation (no text labels or symbols)

step 4 Remove the upper cushion.

Isometric diagram of a two-story building structure with two upper floors and a lower floor, showing structural elements and supports (no text or symbols)

--End

3.3 Inverter Storage

Proper storage is required if the inverter is not installed immediately.

• Store the inverter in the original packing case with the desiccant inside.
• The storage temperature must be always between -40^ and +70^ , and the storage relative humidity must be always between 0 and 95% , non-condensing.
• In case of stacking storage, the number of stacking layers should never exceed the limit marked on the outer side of the packing case.

• The packing case should be upright.

- If the inverter needs to be transported again, pack it strictly before loading and transporting it.

- Do not store the inverter in places susceptible to direct sunlight, rain, and strong electric field.

- Do not place the inverter in places with items that may affect or damage the inverter.

- Store the inverter in a clean and dry place to prevent dust and water vapor from eroding.

- Do not store the inverter in places with corrosive substances or susceptible to rodents and insects.

- Carry out periodic inspections. Inspection shall be conducted at least once every six months. If any insect or rodent bites are found, replace the packaging materials in time.

- If the inverter has been stored for more than a year, inspection and testing by professionals are required before it can be put into operation.

NOTICE

Please store the inverter according to the storage requirements. Product damage caused by failure to meet the storage requirements is not covered by the warranty.

4 Mechanical Mounting

WARNING

Respect all local standards and requirements during mechanical installation.

4.1 Safety During Mounting

DANGER

Make sure there is no electrical connection before installation. Before drilling, avoid the water and electricity wiring in the wall.

WARNING

For specific requirements for the installation environment, see 4.2.1 Installation Environment Requirements. In case the environment where the product is installed does not meet the requirements, SUNGROW shall not be held liable for any property damage arising therefrom.

CAUTION

Improper handling may cause personal injury!

• When moving the product, be aware of its weight and keep the balance to prevent it from tilting or falling.
• Wear proper protective equipment before performing operations on the product.
• The bottom terminals and interfaces of the product cannot directly contact the ground or other supports. The product cannot be directly placed on the ground.

NOTICE

• During installation, ensure that no device in the system causes it hard for the DC switch and the AC circuit breaker to act or hinders maintenance personnel from operating.
  •
• If drilling is required during installation:

- Wear goggles and protective gloves when drilling holes.

- Make sure to avoid the water and electricity wiring in the wall before drilling.

- Protect the product from shavings and dust.

4.2 Location Requirements

To a large extent, a proper installation location ensures safe operation, service life, and performance of the inverter.

• The inverter with protection rating IP66 (NEMA 4X) can be installed both indoors and outdoors.
• The inverter should be installed at a height that allows easy viewing of the LED indicator panel, as well as easy electrical connection, operation and maintenance.

Diagram showing an eye projecting through a window with a checkmark indicating alignment (no text or symbols present)

4.2.1 Installation Environment Requirements

• The inverter produces noise during operation, thus it is not recommended to install it in places for residential purpose. If this cannot be avoided, it is recommended to install the inverter in a place over 25 meters away from the residential area, or take noise mitigation measures.
• If the inverter is installed in a place with lush vegetation, weed on a regular basis. In addition, the ground beneath the inverter needs to undergo certain treatment, such as laying cement or gravel, etc. (an area of 3m×2.5m is recommended).
• Do not install the inverter in an environment with flammables, explosives, or smoke.

• Do not install the inverter in places prone to water leak, e.g., under the air-conditioner vent, the air vent, or the cable outlet window of the machine room, so as to prevent device damage or short circuit caused by intrusion of water.

• Do no install the inverter in a place with corrosives such as corrosive gas and organic solvent, etc.

• When the inverter is running, its surface may carry high voltages or get very hot. Do not touch it; otherwise, it may lead to burns or electric shocks.
• Do not install the inverter in a place that is easy to reach for people.

- If the inverter needs to be installed in a closed or semi-closed environment, please install additional heat dissipation or ventilation devices. Furthermore, while the inverter is operating, ensure the indoor ambient temperature does not exceed the outdoor ambient temperature. A semi-closed environment refers to a special space where natural ventilation is limited and gas or heat may easily accumulate, although it is not fully enclosed on all six sides.

- The installation site must have solid ground, free of rubber-like soils (which cannot be effectively compacted) or weak soils, and should not be prone to subsidence. Also, avoid low-lying areas where water or snow may easily accumulate. Ensure the site is located above the highest recorded water level in the area.

- Do not install the inverter in a position that could be flooded.

- To prevent vegetation or water on the ground from impacting inverter operation, if the space above meets the designated requirements, elevate the inverter to an appropriate height.

- It is suggested to install the inverter in a place with shelter, or build a sunshade for it. However, if the ambient temperature around the inverter is >45^ and the irradiance is greater than 1000W/m^2 , install it in a place with shelter only, to avoid derating caused by direct sunlight.

(The ambient temperature here refers to the ambient temperature approximately 1m around the inverter.)

- Good heat dissipation is very important to the inverter. Please install the inverter in a ventilated environment.

- If the inverter needs to be installed in a closed or semi-closed environment, please install additional heat dissipation or ventilation devices. Furthermore, while the inverter is operating, ensure the indoor ambient temperature does not exceed the outdoor ambient temperature. A semi-closed environment refers to a special space where natural ventilation is limited and gas or heat may easily accumulate, although it is not fully enclosed on all six sides.

- Please consult SUNGROW before installing inverters outdoors in areas prone to salt damage, which mainly are coastal areas within 500 meters of the coast. The sedimentation amount of salt spray is correlated to the characteristics of the seawater, sea winds, precipitation, air humidity, topography, and forest coverage in the adjacent sea areas, and there are substantial differences between different coastal areas.

- Do not install the inverter in an environment contaminated with chemicals such as halogen and sulfide.

• Do not install the inverter in an environment with vibration and strong electromagnetic field. Strong-magnetic-field environments refer to places where magnetic field strength measures over 30 A/m.
• In dusty environments such as places full of dust, smoke, or floc, particles may cling to the device's air outlet or heat sink, thus impacting its heat dissipation performance or even getting it damaged. Therefore, do not install the inverter in dusty environments. If the inverter has to be installed in such environments, please clean its fans and heat sink on a regular basis to ensure a good heat dissipation performance.
• The average temperature approximately 1 m around the inverter should be taken as its operating temperature. The temperature and humidity should meet the requirements below:

4.2.2 Carrier Requirements

The mounting structure where the inverter is installed must comply with local/national standards and guidelines. Ensure that the installation surface is solid enough to bear four times the weight of the inverter and is suitable for the dimensions of the inverter (e.g. cement walls, plasterboard walls, etc.).

Do not install the inverter on a carrier that may vibrate in resonance, so as to avoid making bigger noise.

The structure should meet the following requirements:

Diagram of a fire extinguisher with a red prohibition symbol (no text or labels)

4.2.3 Angle Requirements

Install the inverter vertically or tilt backwards. Do not install the inverter horizontally, forward, excessively backward, sideways, or upside down.

In case the installation site is a level surface, mount the inverter to the bracket to meet the mounting angle requirements, as shown in the figure below.

Take the following items into account when designing the bracket scheme:

• Consider onsite climate conditions and take anti-snow and anti-rain measures if necessary.
• Ensure that the waterproof connectors are at least 550 mm higher than the ground surface.
• Bind the cables at the positions 300\~350 mm away from the DC connector, AC waterproof terminal, and communication waterproof terminal.
• The various waterproof terminals should be tightened with the torque specified in this manual to ensure that they are securely sealed.

Contact SUNGORW if you have any question.

4.2.4 Installation Space Requirements

Space around the inverter

Make sure there is sufficient space around the inverter for good ventilation. The space requirements for installing a single inverter are shown in the figure below.

NOTICE

• To prevent vegetation or water on the ground from impacting inverter operation, if the space above meets the designated requirements, elevate the inverter to an appropriate height.
• The space at the bottom of the inverter must accommodate the required bending radius for the AC output cables.

Run the AC cable into the AC terminal vertically, and make sure the cable is kept vertical for a length of ≥ 200mm.

Air inlets/outlets of the inverter

Make sure there is no obstruction to the inverter's air inlets/outlets, to avoid impacting its heat dissipation. The air inlets/outlets of the inverter are shown in the figure below.

Technical diagram of a mechanical assembly with directional arrows indicating flow or movement (no text or symbols present)

Inverters installed against the wall

If the inverter is installed against the wall, keep it at least 700mm away from the wall.

Inverters installed in one row

When installing multiple inverters, reserve sufficient space between the inverters. It is recommended to position them in one row.

Inverters installed back-to-back

For two inverters installed back-to-back, the distance between them should be at least 600mm.

When installing more than two inverters back-to-back, sufficient space should be reserved between the adjacent inverters.

If the above installation requirements cannot be met, please contact SUNGROW for support.

4.3 Installation Tools

Installation tools include but are not limited to the following recommended ones. If necessary, use other auxiliary tools on site.

table 4-1 Tool specification

Line drawing of a pair of eyeglasses (no text or symbols)

Simple line drawing of two rounded objects connected by a wavy line, enclosed in a rounded square frame (no text or symbols)

Line drawing of a helmet with a square opening and two handles (no text or symbols)

Line drawing of two hands in a relaxed position, enclosed in a rounded square frame (no text or symbols)

Goggles Earplugs Dust mask Safety gloves

Line drawing of a pair of sneakers (no text or symbols)

Safety shoes Utility knife Slotted screwdriver

Illustration of a mechanical tool or device with a handle and segmented body (no text or symbols)

Illustration of a screwdriver with a hexagonal nut (no text or symbols)

(M2, M3, M6)

Illustration of a screwdriver with a hexagonal nut symbol (no text or labels)

Phillips screwdriver (M4, M6, M8)

Illustration of a drill bit with a flat blade and handle (no text or symbols)

Hammer drill (φ12)

Illustration of a pair of pliers (no text or symbols)

Pliers Marker Level

Simple 3D illustration of a sharpened pencil inside a rounded square frame (no text or symbols)

Simple icon of a CD-ROM drive with two buttons and a central screen (no text or symbols)

Simple icon of a hammer inside a rounded square frame (no text or symbols)

Rubber mallet Socket wrench set

Illustration of a toolbox containing various tools (no text or labels visible)

(M4, M8, M12)

Simple line drawing of a wrench inside a rounded square frame (no text or symbols)

Open-end wrench (16 mm, 35 mm)

Line drawing of a mechanical component or housing (no text or symbols)

Anti-static wrist strap

Illustration of a pair of pliers (no text or symbols)

Wire cutter Wire stripper Hydraulic plier Heat gun

Illustration of two pliers with black handles and metal bands (no text or symbols)

Illustration of a handheld electric shaver (no text or symbols visible)

Illustration of a pair of crimping tools (no text or symbols)

crimping tool(10 AWG or 8 AWG)

Illustration of a mechanical tool with three circular holes and a handle (no text or symbols)

Connector wrench Multimeter (≥ 1500 Vdc)

(≥ 1500 Vdc)

Vacuum cleaner

Model: PV-CZM-22100

Manufacturer: STAUBLI

Simple illustration of a pair of scissors (no text or symbols)

Scissors Hexagon sock-

Simple 3D illustration of a bent tool or bracket (no text or symbols)

et wrench
(T30)

Line drawing of a handheld electric drill bit (no text or symbols)

Electric drill
(φ12)

4.4 Moving Inverter

Move the inverters by carrying them manually or using a hoisting tool based on site conditions.

CAUTION

Improper handling may cause personal injury!

• Arrange an appropriate number of personnel to carry the inverter according to its weight, and installation personnel should wear protective equipment such as anti-impact shoes and gloves.
• Attention must be paid to the center of gravity of the inverter to avoid tilting during handling.
• Placing the inverter directly on a hard ground may cause damage to its metal enclosure. Protective materials such as sponge pad or foam cushion should be placed underneath the inverter.
• Move the inverter by holding the handles on it. Do not move the inverter by holding the terminals.

4.4.1 Manual Transport

Install the four screw-in handles that are provided to the inverter lugs and the base. Lift and move the inverter to the destination by holding the bottom handles and the four installed handles.

NOTICE

When handling the inverter, do not remove the cushion to avoid damage to the housing or bottom terminals.

4.4.2 Hoisting Transport

Tools

Device Name Requirement Source
Crane Load bearing capacity ≥ 180kg	Not included in the scope of delivery
Lifting ring 2, M12, load bearing capacity of a single ring ≥ 260 kg	Not included in the scope of delivery
Sling 1, length ≥ 2.5 m, load bearing capacity of a single sling ≥ 600 kg	Not included in the scope of delivery

step 1 Release the sealing screws on the mounting lugs and store them properly. Anchor two M12 thread lifting rings to the lugs of the inverter.

NOTICE

When handling the inverter, do not remove the cushion to avoid damage to the housing or bottom terminals.

step 2 Lead the sling through the two lifting rings and fasten the tie-down strap.

step 3 Hoist the inverter, and stop to check for safety when the inverter is 100 mm above the ground. Continue hoisting the device to the destination after ensuring the safety.

Diagram of a crane lifting a rectangular object with a yellow handle and 'SUNGROW' label, no readable text or symbols beyond the label.

step 4 Remove the lifting rings and reassemble the sealing screws released in Step 1.

CAUTION

Keep the inverter balanced throughout the hoisting process and avoid collisions with walls or other objects. Stop hoisting in the event of severe weather, such as heavy rain, thick fog, or strong wind.

The lifting rings and the sling are not within the delivery scope.

--End

4.5 Installing Mounting-bracket

The inverter can be installed on a bracket, a wall, and a pole by means of mounting-bracket. Dimensions of the assembled mounting-bracket are as follows.

Reserve enough space when installing the mounting-bracket to meet the installation space requirements of the inverter.

4.5.1 Bracket-Mounted Installation

Tools

Item Specification

Phillips screwdriver M4

Marker -

Level -

Electric drill Drill bit: φ12

Wrench Opening: 16 mm

Spare parts

Item Quantity Specification Source
Grub screw 2 M4×10 Delivery scope
Bolt assembly 4 M10	Delivery scope

step 1 Assemble the mounting-bracket.

step 2 Place the assembled mounting-bracket onto the PV bracket. Adjust the angle with a level and mark positions for drilling holes. Drill the holes by using an electric drill.

Diagram showing structural modification of a frame structure, with no visible text or symbols

step 3 Secure the mounting-bracket with bolts.

(A) Mounting-bracket (B) Full threaded bolt (C) Metal bracket
(D) Flat washer (E) Spring washer (F) Hex nuts

-- End

4.5.2 Pole-Mounting

Tools

Item Specification

Phillips screwdriver M4

Marker —

Level —

Electric drill * Drill bit: φ12

Wrench Opening: 16 mm

* Check whether other tools are needed according to the specification of clamp bolts.

Spare parts

Item Quantity Specification Source
Grub screw 2	M4×10		Delivery scope
Bolt assembly	4	M10	Delivery scope
Nut assembly	4	M10	Self-prepared
U-beam	2	—	Self-prepared
Clamp	2	Determined by pole size	Self-prepared

step 1 Bury the pole into the installation site.

Please skip this step if the inverter is to be installed on a concrete post, PV bracket, etc.

step 2 Assemble the mounting-bracket.

step 3 Mark and punch holes in the U-beam according to the dimensions shown below.

step 4 Use bolts and clamps to fix the U-beam to the pole.

step 5 Use bolts to secure the mounting-bracket to the U-beam.

--End

4.6 Installing the Inverter

Tools

Item Specification

Phillips screwdriver M6

Spare parts

Item Quantity Specification Source

Grub screw 2 M6×65 Delivery scope

step 1 If the installation position is high, hoist the inverter to the position (refer to 4.4.2 Hoisting Transport). Otherwise, skip this step.

step 2 Remove the bottom cushion and lift the inverter onto the mounting-bracket. Make sure that the mounting lugs fit well into the grooves of the mounting-bracket.

graph LR
    A["Assembly Setup"] --> B["Reassembly"]
    B --> C["Assembly Steps"]
    C --> D["Final Assembly"]

    subgraph Details
    E["Component 1: Internal Component 1, Internal Component 2, Internal Component 3"] --> F["Assembly Step 1"]
    G["Assembly Step 2"] --> H["Assembly Step 3"]
    end

step 3 Fix the inverter with screws.

NOTICE

It is necessary to secure the left and right sides of the inverter to the mounting-bracket with screws, otherwise the inverter may become unstable.

--End

5 Electrical Connection

5.1 Safety Instructions

! DANGER

The PV string will generate lethal high voltage when exposed to sunlight.

• Operators must wear proper personal protective equipment during electrical connections.
• Must ensure that cables are voltage-free with a measuring instrument before touching DC cables.
• Respect all safety instructions listed in relevant documents about PV strings.

DANGER

• Before electrical connections, please make sure that the inverter switch and all switches connected to the inverter are set to "OFF", otherwise electric shock may occur!
• Ensure that the inverter is undamaged and all cables are voltage free before performing electrical work.
• Do not close the AC circuit breaker until the electrical connection is completed.

WARNING

Damage to the product caused by incorrect wiring is not covered by the warranty.

• Electrical connection must be performed by professionals.
- Operators must wear proper personal protective equipment during electrical connections.
- All cables used in the PV generation system must be firmly attached, properly insulated, and adequately dimensioned. Cables used shall comply with the requirements of local laws and regulations.
- The factors that affect cable selection include rated current, cable type, routing mode, ambient temperature, and maximum expected line loss.

WARNING

• Do not damage the ground conductor. Do not operate the product in the absence of a properly installed ground conductor. Otherwise, it may cause personal injury or product damage.
• Please use measuring devices with an appropriate range. Overvoltage can damage the measuring device and cause personal injury.

NOTICE

All electrical connections must comply with local and national/regional electrical standards.

• Cables used by the user shall comply with the requirements of local laws and regulations.
• Only with the permission of the national/regional grid department, the inverter can be connected to the grid.

NOTICE

• Install the external protective grounding cable first when performing electrical connection and remove the external protective grounding cable last when removing the inverter.
• Comply with the safety instructions related to PV strings and the regulations related to the utility grid.

NOTICE

• After being crimped, the OT terminal must wrap the wires completely, and the wires must contact the OT terminal closely.
- When using a heat gun, protect the device from being scorched.
- Before connecting a power cable (such as the AC cable, the DC cable, etc.), confirm that the label and identifier on the power cable are correct.
- When laying out communication cables, separate them from power cables and keep them away from strong interference sources to prevent communication interruption.
- All vacant terminals must be covered with waterproof covers to prevent affecting the protection performance.
- Ensure that AC output cables are firmly connected. Failing to do so may cause inverter malfunction or damage to its AC connectors.
- When the wiring is completed, seal the gap at the cable inlet and outlet holes with fireproof/waterproof materials such as fireproof mud to prevent foreign matter or moisture from entering and affecting the long-term normal operation of the inverter.

The cable colors in figures in this manual are for reference only. Please select cables according to local cable standards.

5.2 Terminal Description

All electrical terminals are located at the side and bottom of the inverter.

figure 5-1 Terminal Description

* The image shown here is for reference only. The actual product received may differ.

Item Terminal Mark Note

A PV terminals + / - 24, PV connector
B	AC wiring terminal	— Used for AC output cable connection.
C	Communication terminal	COM1 For RS485 communication wiring.
D	Communication terminal	COM2	DI/DO and CAN wiring, etcCommunication terminal COM2 is optional, subject to actual product received
E	External protective grounding terminal		For reliable grounding2, use at least one of them to ground the inverter.

5.3 Electrical Connection Overview

Electrical connection in the PV system includes external grounding connection, AC connection, and PV string connection.

graph TD
    A["Solar Panel"] -->|1| B["Grid"]
    B -->|2| C["Power Transmission Tower"]
    C -->|3| D["Mobile Device"]
    D -->|4| E["Output"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333

(A) PV string (B) Inverter
(C) Grid
(D) Monitoring device
(E) AC circuit breaker

table 5-1 Cable Requirements

No.	Cable	Type	Specification
			Conductor Cross-sectional Area
1	DC cable(1)	PV cable complying with 1,500V standard	10 AWG8 AWG (optional)
2	External grounding cable	Outdoor single-core copper wire cable	S_p ≥ S/2^(3)
No. Cable Type			Specification
			Conductor Cross-sectional Area
3 AC cable	(5)	Outdoor four-core copper / aluminum wire cable(2)	S: 350 Kcmil~750 Kcmil S_p ≥ S/2^(4)
		Outdoor three-core copper / aluminum wire cable(2)
		Outdoor PE cable(3)
		Four single-core outdoor copper cables
		Three single-core outdoor aluminum cables
		Outdoor PE cable
4	Communication cable	Shielded twisted pair 0.75 mm	^2 1.5 mm^2

Note(1): It is prohibited to use PVC cables when STAUBLI connectors are used. The DC cable must be made of tinned copper conductors, with a minimum of 7 cores and an outside diameter ranging from 5.9 mm to 8.8 mm.
Note(2): A copper to aluminum adapter terminal is required when an aluminum cable is used. For details, refer to Aluminum Cable Requirements.
Note(3): The specifications are valid only when the phase wire and PE wire use the same material. If otherwise, ensure that the cross section of the PE wire produces a conductance equivalent to that of the wire specified in the table.
Note(4): S is the cross-sectional area of the AC cable conductor, and Sp is the cross-sectional area of the ground cable conductor.
Note(5): The size of the sealing plate and the supported outer diameter of the Locknut are shown in the figure below. Please select an appropriate conduit according to actual needs.

5.4 Crimp OT/DT terminal

Crimp OT/DT terminal

graph TD
    A["Step 1: L = E + (2~3)mm"] --> B["Step 2: Component 1"]
    B --> C["Step 3: Component 2"]
    C --> D["Step 4: Component 3"]
    D --> E["Final Setup"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#ffc,stroke:#333

1. Heat shrink tubing 2. OT/DT terminal
2. Hydraulic pliers 4. Heat gun

Aluminum Cable Requirements

If an Aluminum cable is selected, use a copper to Aluminum adapter terminal to avoid direct contact between the copper bar and the Aluminum cable.

figure 5-2 Aluminum Cable Connection

1. Copper to Aluminum adapter terminal 2. Flange nut 3. Aluminum cable

NOTICE

Ensure that the selected terminal can directly contact with the copper bar. If there are any problems, contact the terminal manufacturer.

Ensure that the copper bar is not in direct contact with the aluminum wire. Otherwise, electrochemical corrosion may occur, impairing the reliability of electrical connection.

5.5 External Protective Grounding Connection

! DANGER

• There are large currents during the inverter's operation. If the inverter is powered on and put into operation without being grounded, it may lead to electric shock hazards or failures of major protective functions such as surge protection. Therefore, before powering on the inverter, make sure it has been reliably grounded; otherwise, damages caused therefrom will not be covered by warranty.
• When performing electrical connections of the inverter, give the highest priority to grounding. Be sure to carry out the grounding connection first.

WARNING

• Since the inverter is not equipped with a transformer, neither the negative electrode nor the positive electrode of the PV string can be grounded. Otherwise, the inverter will not operate normally.
• Connect the grounding terminal to the external protective grounding point before AC cable connection, PV string connection, and communication cable connection.
• The external protective grounding point provides a reliable ground connection. Do not use an improper grounding conductor for grounding, Otherwise, it may cause product damage or personal injury.
• Depending on Local Rules, please also ground the PV panel subconstruction to the same common grounding point (PE Bar) in addition to local lightning protection rules.

WARNING

The external protective grounding terminal must meet at least one of the following requirements.

• The cross-sectional area of the grounding cable is not less than 10 mm for copper wire or 16 mm ^2 for aluminum wire. It is recommended that both the external protective grounding terminal and the AC side grounding terminal be reliably grounded.
• If the cross-sectional area of the grounding cable is less than 10 mm ^2 for copper wire or 16 mm ^2 for aluminum wire, ensure that both the external protective grounding terminal and the AC side grounding terminal are reliably grounded.

The grounding connection can be made by other means if they are in accordance with the local standards and regulations, and SUNGROW shall not be held liable for the possible consequences.

5.5.1 External Protective Grounding Requirements

All non-current carrying metal parts and device enclosures in the PV power system should be grounded, for example, brackets of PV modules and inverter enclosure.

When there is only one inverter in the PV system, connect the external protective grounding cable to a nearby grounding point.

When there are multiple inverters in the PV system, connect the external protective grounding terminals of all inverters and the grounding points of the PV module brackets to ensure equipotential connections to ground cables (according to the onsite conditions).

5.5.2 Connection Procedure

step 1 Prepare the cable and OT/DT terminal, refer to 5.4 Crimp OT/DT terminal.

step 2 Remove the screw on the grounding terminal and fasten the cable with a screwdriver.

step 3 Apply paint to the grounding terminal to ensure corrosion resistance.

The grounding screws have been anchored to the side of the inverter before delivery, and do not need to be prepared.

There are two grounding terminals. Use one of them to ground the inverter.

-- End

5.6 AC Cable Connection

5.6.1 AC Side Requirements

Only with the permission of the local grid department, the inverter can be connected to the grid.

Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with requirements, for which, refer to "Technical Data". Otherwise, contact the electric power company for help.

AC Circuit Breaker

WARNING

Over-current protection devices, such as AC circuit breakers and fuses, must be installed on the AC side of the inverter and the grid side to ensure safe disconnection between the inverter and the grid.

• Do not connect any local load between the inverter and the AC circuit breaker except for the tracking axis.
• Multiple inverters cannot share one AC circuit breaker.

Multiple Inverters in Parallel Connection

When multiple inverters are connected to the grid in parallel, ensure that the maximum number of inverters connected in parallel to a single winding of the box-type substation is 15. Otherwise, please contact SUNGROW for technical scheme.

MV Transformer

The MV transformer used together with the inverter should meet the following requirements:

• A distribution transformer can be used if it is designed for the typical cyclical loads of a PV system (there is load in the day and no load at night).
• A liquid-immersed type transformer or a dry type transformer can be used, and the shield winding is not a requisite.
• The line-to-line voltage on the LV side of the transformer should endure the output voltage of inverter. When the transformer is connected to the IT grid, to-ground withstanding voltage of the LV winding of the transformer, the LV side AC cables, and the LV side secondary equipment (including the relay protection device, detection & measuring device, and other related auxiliary devices) should not be lower than 906 V.
• The line-to-line voltage on the HV side of the transformer should comply with the local power grid voltage.
• A transformer with a tap changer on the HV side is recommended in order to keep the voltage consistent with the grid voltage.
• At an ambient temperature of 30^ C, the transformer can run in 1.1 times of load for a long time.
• The DC component that the transformer can withstand is 1% of the fundamental current at rated power.
• For thermal rating, the load curve of the transformer and environment conditions should be taken into account.
• The apparent power of the inverter should never exceed the power of the transformer. The maximum AC current of all inverters connected in parallel must be taken into account. If more than 15 inverters are connected to the grid, contact SUNGROW.
• The transformer must be protected against overloading and short circuit.
• The transformer is an important part of grid-connected PV generation system. The fault tolerance capacity of the transformer should be taken into account at all times. The fault include: system short circuit, grounding fault, voltage drop, etc.
• Take ambient temperature, relative humidity, altitude, air quality, and other environmental conditions into account when selecting and installing the transformer.
• The overall technical requirements of the box-type LV cabinet are as follows:

- The breaking capacity of the branch molded case circuit breaker (MCCB) and air circuit breaker (ACB) of the box-type LV cabinet should be greater than the short circuit current at the LV side of the transformer. For example, the LV side short-circuit current of a boost transformer with a rated capacity of 3200 kVA and a short-circuit resistance of 7% can be calculated in the following way: I=3200/0.8/1.732/0.07/0.9=36.66kA. Thus the MCCB Icu of the LV cabinet branch circuit should be no less than 36.66kA at 880Vac. The LV side short-circuit current of a boost transformer with a rated capacity of 4480kVA and a short-circuit impedance of 8% can be calculated in the following way: I=4480/0.8/1.732/0.08/0.9=44.91kA. Thus the MCCB Icu of the LV cabinet branch circuit should be no less than 44.91kA at 880Vac.

• The temperature and altitude derating should be taken into account when a circuit breaker is working, and a LV cabinet temperature rise test report is required.
• When designing a LV cabinet, must pay attention to the impact of the diffused MCCB electric arc on the cabinet and other branch circuit MCCBs, thus the interior of the cabinet needs to be insulated. A third-party test report of the circuit-breaking performance of the whole machine in an event of a short-circuit on the LV side is also required. It is recommended to adopt graduated protection to ensure that in an event of a single short-circuit fault on the LV side of the box, the corresponding branch MCCB trips normally while the general ACB does not trip.
• If PLC communication is adopted, reserve a fuse-switch disconnector or circuit breaker inside the LV power distribution room of the box-type transformer. For the connection to the EMU200 communication box, it is recommended to use the outdoor-type UV-resistant multi-core copper AC cable with a core diameter of 2.5mm^2 or above and an insulation voltage of >1000V. The PLC cable connecting the EMU200 to the LV bus of the box-type transformer should be <10m.

- When Anti-PID is enabled, the AC output common mode voltage of the inverter is 906V, and the following requirements should be met:

• The LV side winding of the transformer, AC cables, and secondary devices (including protective relay, detection and measurement instruments, and related auxiliary devices) must withstand the voltage to ground of at least 906 V.
• If the LV side winding is in Y shape, neutral point grounding is prohibited.
• Surge protective devices (SPD) for the AC combiner box and on the LV side of the transformer are recommended to be connected in the "3+1" manner, as shown in the figure below. The Min. continuous operating voltages of M1 - M4 are 680 Vac.

- The string serial communication box EMU200A requires an external power supply of 220 Vac, so a power supply port and an input port (including switches) should be reserved in the LV power distribution room of the boost transformer.

5.6.2 Requirements for OT/DT Terminal

OT/DT terminals (not included in the delivery scope) are required for fixing AC cables to the terminal block. Purchase the OT/DT terminals according to the following requirements.

OT/DT Terminals of Phase Wire

- Specification: M12

OT/DT Terminal of PE Wire

- Specification: M12

5.6.3 Connection Procedure

This section introduces the connection steps with four-core cable as an example, and the wiring method for three-core cable is the same.

step 1 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection.

step 2 Loosen the two screws on the front cover of the junction box with the hexagon socket wrench provided. Open the junction box. During the wiring process, the limit rod attached to the cover keeps the junction box open.

graph TD
    A["1: Open"] --> B["2: Holding Panel"]
    B --> C["3: Closed with Doorbell"]

The screws on the front cover of the junction box are captive screws, which will remain on the front cover when the cover is open to avoid screw loss.

step 3 Install an appropriate conduit.

step 4 Lead the cable with the protective layer removed through the conduit.

Technical line drawing of an open electrical enclosure with visible wiring and components (no text or symbols)

step 5 Open the protection cover.

Diagram of an open electrical enclosure showing internal wiring and components (no text or labels)

step 6 Fix cables with crimped OT/DT terminals to corresponding terminals.

i

Ensure that the depth L of the socket used is not less than 28 mm.

step 7 Close the protection cover.

Diagram showing two views of an open electrical enclosure with visible wiring and components, no text or symbols present.

step 8 Remove the limit rod and place it in place. Close the junction box and tighten the two screws on its front cover with the hexagon socket wrench provided.

--End

5.7 DC Cable Connection

! DANGER

The PV string will generate lethal high voltage when exposed to sunlight.

- Respect all safety instructions listed in relevant documents about PV strings.

WARNING

• Make sure the PV array is well insulated to ground before connecting it to the inverter.
• Make sure the maximum DC voltage and the maximum short circuit current of any string never exceed inverter permitted values specified in "Technical Data".
• Check the positive and negative polarity of the PV strings, and connect the PV connectors to corresponding terminals only after ensuring polarity correctness.
• During the installation and operation of the inverter, please ensure that the positive or negative electrodes of PV strings do not short-circuit to the ground. Otherwise, an AC or DC short-circuit may occur, resulting in equipment damage. The damage caused by this is not covered by the warranty.
• Electric arc or contactor over-temperature may occur if the DC connectors are not firmly in place, and the loss caused is not covered by the warranty.
• If the DC input cables are reversely connected or the positive and negative terminals of different MPPT are shorted to ground at the same time, while the DC switch is in the "ON" position, do not operate immediately. Otherwise, the inverter may be damaged. Please turn the DC switch to "OFF" and remove the DC connector to adjust the polarity of the strings when the string current is lower than 0.5 A.
• Use the DC connectors supplied with the product for DC cable connection. Using incompatible DC connectors may result in serious consequences, and the device damage is not covered under warranty.
• Inverters do not support full parallel connection of strings (Full parallel connection refers to a connection method in that strings are connected in parallel and then connected to the inverter separately).
• Do not connect one PV string to multiple inverters. Otherwise, the inverters may be damaged.
• If AC wiring is to be performed when the inverter is connected to the grid, ensure the DC switches are set to "OFF" to guarantee the construction safety.

NOTICE

The following requirements about PV string connection must be met. Otherwise, it may cause irreversible damage to the inverter, which is not covered by the warranty.

- Mixed use of PV modules of different brands or models in one MPPT circuit, or PV modules of different orientation or inclination in a string may not damage inverter, but will cause system bad performance!

5.7.1 PV Input Configuration

• As shown in the figure below, the inverter is provided with multiple PV inputs, each PV input is designed with an MPP tracker.
  • Each PV input operates independently and has its own MPPT. In this way, string structures of each PV input may differ from each other, including number of PV modules in each string, angle of tilt, and installation orientation.
  • Each PV input includes two PV strings. In order to fully utilize the input power of PV panels, the PV strings of each PV input should have the same structure, including the same type, the same number, the same tilt, and the same orientation.

graph TD
    PV1["PV 1"] --> MPPT1["MPPT1"]
    PV2["PV 2"] --> MPPT1
    PV3["PV 3"] --> MPPT2["MPPT2"]
    PV4["PV 4"] --> MPPT2
    PV2n-1["PV 2n-1"] --> MPPTn["MPPT n"]
    PV2n["PV 2n"] --> MPPTn
    MPPT1 --> n_n["12 (SG200HX-US)"]
    MPPT2 --> n_n
    MPPTn --> n_n

figure 5-3 PV Input Configuratinon

Prior to connecting the inverter to PV inputs, the specifications in the following table should be met:

Open-circuit Voltage Limit Max. Current for Input Connector

1500 V 30 A

Terminal Configuration Description

Please refer to the following requirements for DC terminal connection:

• If the number of actual PV strings is less than the number of PV strings that can be connected to the inverter, ensure that each MPPT is connected with at least one string.
• Please make sure that the connected PV strings are relatively evenly shared by the MPPTs.
• While performing connection, please give priority to the odd-numbered terminals (PV1, PV3, PV5, PV7, PV9, PV11, PV13, PV15, PV17, PV19, PV21, PV23, PV25, PV27, PV29, PV31), which are circled in red in the figure below.

graph TD
    subgraph MPPT1
        A1[" "] --> A2["PV1"]
        A2 --> A3["PV3"]
        A3 --> A4["PV5"]
        A4 --> A5["PV7"]
    end
    subgraph MPPT2
        B1[" "] --> B2["PV9"]
        B2 --> B3["PV11"]
        B3 --> B4["PV13"]
        B4 --> B5["PV15"]
    end
    subgraph MPPT3
        C1[" "] --> C2["PV17"]
        C2 --> C3["PV19"]
        C3 --> C4["PV21"]
        C4 --> C5["PV23"]
    end
    subgraph MPPT4
        D1[" "] --> D2["PV25"]
        D2 --> D3["PV27"]
        D3 --> D4["PV29"]
        D4 --> D5["PV31"]
    end
    subgraph MPPT5
        E1[" "] --> E2["PV8"]
        E2 --> E3["PV10"]
        E3 --> E4["PV12"]
        E4 --> E5["PV14"]
        E5 --> E6["PV16"]
    end
    subgraph MPPT6
        F1[" "] --> F2["PV18"]
        F2 --> F3["PV20"]
        F3 --> F4["PV22"]
        F4 --> F5["PV24"]
    end
    subgraph MPPT7
        G1[" "] --> G2["PV26"]
        G2 --> G3["PV28"]
        G3 --> G4["PV30"]
        G4 --> G5["PV32"]
    end

figure 5-4 Terminal connection Description

5.7.2 Assembling PV Connectors

! DANGER

High voltage may be present in the inverter!

• Ensure all cables are voltage-free before performing electrical operations.
• Do not connect the AC circuit breaker before finishing electrical connection.

NOTICE

Please use the DC terminal within the scope of delivery or purchase the PV connector according to the recommended model below. Equipment damage caused by the use of unmatched terminals is not covered by the warranty.

• If the cross-sectional area of the DC cable is 10 AWG, use the PV connector within the scope of delivery. The recommended model of the female cable connector is PV-ADSP4-S2/6-UR (STAUBLI), and the recommended male cable connector is PV-ADBP4-S2/6-UR (STAUBLI).
• If the cross-sectional area of the DC cable is 8 AWG, please use the PV connector purchased from STAUBLI. The recommended model of the female cable connector is PV-ADSP4-S2/6-UR (STAUBLI), and the recommended male cable connector is PV-ADBP4-S2/6-UR (STAUBLI).

step 1 Strip the insulation from each DC cable by 8 mm \~ 10 mm.

step 2 Assemble the cable ends with the crimping pliers.

1: Positive crimp contact
2 : Negative crimp contact

step 3 Lead the cable through the cable gland, and insert the crimp contact into the insulator until it snaps into place. Gently pull the cable backward to ensure firm connection. Tighten the cable gland and the insulator (torque 2.5 N.m to 3 N.m).

step 4 Check for polarity correctness.

NOTICE

If the PV polarity is reversed, the inverter will be in a fault or alarm state and will not operate normally.

--End

5.7.3 Installing PV Connector

step 1 Rotate the DC switch to "OFF" position.

step 2 Check the cable connection of the PV string for polarity correctness and ensure that the open circuit voltage in any case does not exceed the inverter input limit of 1,500V.

NOTICE

The multimeter must have a DC voltage range of at least 1,500 V. If the voltage is a negative value, the DC input polarity is incorrect. Please correct the DC input polarity. If the voltage is greater than 1,500 V, too many PV modules are configured to the same string. Please remove some PV modules.

step 3 Connect the PV connectors to corresponding terminals until there is an audible click.

step 4 Follow the foregoing steps to connect PV connectors of other PV strings.

step 5 Seal any unused PV terminal with a terminal cap.

NOTICE

Turn the corresponding DC switch to "ON" after the PV string is connected to the PV terminal on the inverter.

--End

5.8 RS485 Connection(COM1)

5.8.1 Interface Description

The inverter communication terminal COM1 is located at the bottom of the inverter, as shown in the figure below.

table 5-2 COM1 Terminal Definition

Port PIN Definition Description
RS485_1	1	RS485A1, RS485 differential signal+	Used for cascading inverters or connecting to devices such as the Data Logger.
	2	RS485A1, RS485 differential signal+
	3	RS485B1, RS485 differential signal-
	4	RS485B1, RS485 differential signal-
PE	5 PE, shielding ground		—
	6 PE, shielding ground
RS485_2	7	RS485A2, RS485 differential signal+	Used for connecting to communication devices of the tracking system.
	8	RS485B2, RS485 differential signal-

5.8.2 RS485 Communication System

Single-inverter Communication System

In case of a single inverter, communication cable connection requires only one RS485 cable.

(A) Inverter (B) Data Logger (C) PC

Multi-inverter Communication System

In case of multiple inverters, all the inverters can be connected via RS485 cables in the daisy chain manner. The communication cable of the tracking system can be connected to the port RS485_2 of any inverter in the daisy chain.

graph TD
    A["Module A"] -->|1/2 3/4| B["Component B"]
    A -->|1/2 3/4| C["Component C"]
    A -->|7.8| D["Component D"]
    B --> C
    C --> D
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333

(A) Inverter (B) Data Logger (C) PC (D) Tracking system

The length of the RS485 cable should be no longer than 1,000 m.

If multiple inverters are connected to the data logger, the number of permissible daisy chains and the number of devices allowed to be connected should meet the requirements (refer to the user manual of the data logger).

5.8.3 Connection Procedure

step 1 Unscrew the swivel nut from the communication terminal and take out the seal.

Diagram of a cylindrical device with a blue arrow indicating rotation or movement, showing internal components without any text or symbols.

step 2 Press the snap on both sides of the connector to separate the cable gland and the terminal block.

Technical line drawing of a cylindrical device with internal components and a blue arrow pointing to a component (no text or symbols)

step 3 Select a seal according to the cable outer diameter. Lead the cable through the swivel nut, seal and the cable gland.

step 4 Strip the protective layer and the insulation layer of the cable to proper length.

step 5 Secure the wires to corresponding terminals.

step 6 Pull cables outwards to confirm whether they are fastened firmly, then tighten the swivel nut with appropriate torque.

step 7 Remove the waterproof lid from the communication terminal COM1.

Illustration of a mechanical component with a blue downward arrow indicating force or direction (no text or symbols present)

step 8 Insert the connector into the communication terminal.

3D illustration of a mechanical device with a blue arrow indicating direction (no text or symbols)

step 9 Seal the vacant cable hole with a waterproof plug.

Diagram of a flashlight with a gold connector and blue directional arrow indicating motion (no text or symbols)

-- End

5.9 PLC Communication Connection

With a PLC communication module built inside, the inverter can communicate with the Data Logger provided by SUNGROW. For specific wiring method, refer to the user manual for the data logger.

• The Data Logger is an optional device that can be ordered from SUNGROW.
• The Data Logger conducts data communication by directly using the AC output cable of the inverter and thus saves the trouble to lay and maintain the special communication cables. The RS-485 port of the Data Logger supports the transparent transmission of the MODBUS-RTU and is completely compatible with the monitoring devices and software of the original RS-485 communication method.

5.9.1 Application Scenarios

Device can be connected to a double-split transformer and a double-winding transformer. Wiring diagrams under these two scenarios are shown as follows. PLC1 refers to the MPLC node built in Logger4000. All cables run outside Logger 4000 in the wiring diagram, only for a clear illustration of the wiring principles.

graph TD
    subgraph_EMU200A["EMU200A"]
        A["Switch"] --> B["PLC1"]
        B --> C["L1"]
        B --> D["L2"]
        B --> E["L3"]
        F["Controller"] --> G["FU"]
        H["Controller"] --> I["PLC cable"]
        J["Controller"] --> K["AC cable"]
    end

    EMU200A -->|D2| Transformer
    EMU200A -->|AC input, 100~277 Vac| Transformer
    EMU200A -->|D1| Inverter
    EMU200A -->|D2| Transformer
    Inverter -->|D1| D1
    Inverter -->|D2| D2
    D1 --> FU["PU"]
    D1 --> GS["GS"]
    FU --> FU1["FU"]
    FU --> GS1["QS"]
    GS --> FU2["FU"]
    GS1 --> FU3["QS"]
    FU3 --> FU4["ACB"]
    FU4 --> FU5["FU"]
    FU5 --> FU6["QS"]
    FU6 --> FU7["ACB"]
    FU7 --> FU8["FU"]
    FU8 --> FU9["QS"]
    FU9 --> FU10["FU"]
    FU10 --> FU11["FU"]
    FU11 --> FU12["QS"]
    FU12 --> FU13["FU"]
    FU13 --> FU14["QS"]
    FU14 --> FU15["FU"]
    FU15 --> FU16["QS"]
    FU16 --> FU17["FU"]
    FU17 --> FU18["QS"]
    FU18 --> FU19["FU"]
    FU19 --> FU20["QS"]
    FU20 --> FU21["FU"]
    FU21 --> FU22["QS"]
    FU22 --> FU23["FU"]
    FU23 --> FU24["QS"]
    FU24 --> FU25["FU"]
    FU25 --> FU26["QS"]
    FU26 --> FU27["FU"]
    FU27 --> FU28["QS"]
    FU28 --> FU29["FU"]
    FU29 --> FU30["QS"]
    FU30 --> FU31["FU"]
    FU31 --> FU32["QS"]
    FU32 --> FU33["FU"]
    FU33 --> FU34["QS"]
    FU34 --> FU35["FU"]
    FU35 --> FU36["QS"]
    FU36 --> FU37["FU"]
    FU37 --> FU38["QS"]
    FU38 --> FU39["FU"]
    FU39 --> FU40["QS"]
    FU40 --> FU41["FU"]
    FU41 --> FU42["QS"]
    FU42 --> FU43["FU"]
    FU43 --> FU44["QS"]
    FU44 --> FU45["FU"]
    FU45 --> FU46["QS"]
    FU46 --> FU47["FU"]
    FU47 --> FU48["QS"]
    FU48 --> FU49["FU"]
    FU49 --> FU50["QS"]
    FU50 --> FU51["FU"]
    FU51 --> FU52["QS"]
    FU52 --> FU53["FU"]
    FU53 --> FU54["QS"]
    FU54 --> FU55["FU"]
    FU55 --> FU56["QS"]
    FU56 --> FU57["FU"]
    FU57 --> FU58["QS"]
    FU58 --> FU59["FU"]
    FU59 --> FU60["QS"]
    FU60 --> FU61["FU"]
    FU61 --> FU62["QS"]
    FU62 --> FU63["FU"]
    FU63 --> FU64["QS"]
    FU64 --> FU65["FU"]
    FU65 --> FU66["QS"]
    FU66 --> FU67["FU"]
    FU67 --> FU68["QS"]
    FU68 --> FU69["FU"]
    FU69 --> FU70["QS"]
    FU70 --> FU71["FU"]
    FU71 --> FU72["QS"]
    FU72 --> FU73["FU"]
    FU73 --> FU74["QS"]
    FU74 --> FU75["FU"]
    FU75 --> FU76["QS"]
    FU76 --> FU77["FU"]
    FU77 --> FU78["QS"]
    FU78 --> FU79["FU"]
    FU79 --> FU80["QS"]
    Fu80 --> Fu81["FU"]
    Fu81 --> Fu82["QS"]
    Fu82 --> Fu83["FU"]
    Fu83 --> Fu84["QS"]

figure 5-5 PLC wiring diagram for a double-winding transformer

graph TD
    A["Switch"] --> B["Logwin000"]
    B --> C["PLC1"]
    C --> D["PLC2"]
    D --> E["PLC3"]
    E --> F["AC cable"]
    F --> G["Auxiliary transformer"]
    H["EMU200A"] --> I["D1"]
    I --> J["FU QS"]
    J --> K["ACB"]
    K --> L["FU QS"]
    L --> M["ACB"]
    M --> N["FU QS"]
    N --> O["Combine point"]
    P["Inverter"] --> Q["FU QS"]
    R["Inverter"] --> S["FU QS"]
    T["Auxiliary transformer"] --> U["Transformer"]
    V["AC cable"] --> W["ACB"]
    X["AC cable"] --> Y["ACB"]
    Z["AC cable"] --> AA["ACB"]
    AB["AC cable"] --> AC["ACB"]
    AD["AC cable"] --> AE["ACB"]
    AF["AC cable"] --> AG["ACB"]

figure 5-6 PLC wiring diagram for a double-split transformer

Description of parameters in the diagrams is listed in the table below.

Parameter Description Cable Specification
D1 Length of PLC	cable from com-munication box to box-type trans-former	·If using multicore AC cable, the length should be ≤990m.·If using single-core AC cable:- When D2 ≤ 3m, the single-core cable length should be ≤790m.- When 3m < D2 ≤ 10m, the single-core cable length should be ≤690m.·If the two-wire-per-phase wiring scheme is adopted, the cable length requirements are the same as above.
D2 PLC cable from box-type trans-former to commu-nication box or ex-ternal PLC mod-ule		·Outdoor UV-resistant multicore copper AC cable should be used, with a recommended core di-ameter of 2.5mm2to 4mm2.Cable isolation voltage >1000V.Cable length ≤ 10m.
		NOTICEThe shorter the cable, the better the communi-cation quality. If the cable length exceeds 10m, there is a risk of communication disconnec-tion.
PLC module	Port input voltage ≤800 Vac
	Port supply volt-age	24 Vdc
	Maximum number of inverters con- nected	80

5.9.2 PLC Wiring Rules

Wiring from box-type transformer to inverter

General requirements

The box-type transformer can be connected to the inverter using multi-core AC cables or single-core AC cables, or adopting the two-wire-per-phase wiring scheme, as required by the project.

To ensure communication quality, the use of multi-core cables is recommended.

• The cable should be laid in cable trenches, cable ducts, or conduits.
• The cables should be laid parallel without any knots or twists.

- For three-phase single-core cables, they should be fixed every 1 meter and arranged in a "triangular" shape.

In this scenario, the cables are not easily bent. It is recommended to tie them separately at positions 10cm before and after the bend.

- If the single-core cables exceed 400 meters, log into the Web UI of Logger4000, on the >MPLC page, set the PLC master node's frequency to Band2 or Band3.

Requirements for two-wire-per-phase wiring

If two-wire-per-phase wiring is adopted, to ensure the MPLC communication quality, the length difference between the two sets of cables must not exceed 5 meters. For two-wire-per-phase

wiring using single-core cables, the requirements for both sets of cables and the frequency band settings are the same as mentioned above.

figure 5-7 Two-wire-per-phase wiring scheme

PLC wiring requirements

- The distance between low-voltage AC cables and medium-voltage AC cables should meet the following requirements:

- Maintain a minimum horizontal distance of 0.5m between low-voltage AC cables and medium-voltage AC cables when laid parallel.

- If two cables are laid in a crossing manner, the angle of crossing should be between 60^ and 120^ , and the vertical distance should be no less than 0.5m.

graph TD
    A["Top view"] --> B["LV cable trench"]
    A --> C["MV cable trench"]
    B --> D["60°~120°"]
    C --> D
    D --> E["Front view"]
    E --> F["MV cable trench"]
    F --> G["≥0.5m"]
    style A fill:#f9f,stroke:#333
    style E fill:#ccf,stroke:#333

- Only AC cables under the same box-type transformer can be laid in the same cable trench.

- When using different box-type transformers, the distance between the low-voltage side cable trays should meet the following requirements:

- Maintain a minimum horizontal distance of 0.5m between cable trays from different box-type transformers.

graph LR
    A["S1 box-type transformer cable tray"] <-->|≥0.5m| B["S2 box-type transformer cable tray"]

- If two cables are laid in a crossing manner, the angle of crossing should be between 60^ and 120^ , and the vertical distance should be no less than 0.5 ~m .

figure 5-8 Vertical crossing distance between PLC cables

Wiring from communication box to box-type transformer

• The AC cable between the box-type transformer and the communication box should be laid parallel without being twisted within the cable trench.
• The coupling point for the PLC cable connecting to the box-type transformer busbar should ideally be at the breaker corresponding to the middle position of the busbar. For example, this would be the 4th or 5th branch in an 8-branch setup, or the 5th branch in a 9-branch setup.

5.9.3 PLC Wiring

Pre-wiring preparation

• Before performing AC wiring, please ensure that upstream AC switches and fuses inside the device are all in the open state.
• Please refer to 5.9.1 Application Scenarios for PLC application scenarios and cable specifications.
• Please refer to 5.9.2 PLC Wiring Rules for wiring diagrams under different application scenarios.

Steps of wiring

1 Unscrew the "MPLC 800V" waterproof terminal at the bottom of the device, and lead the external AC cable through the waterproof terminal.
2 Remove the protective layer of the cable using a wire stripper to expose the copper core, as shown in the figure below.

3 Crimp the OT terminals (OT2.5-6 is recommended).

graph TD
    A["Step 1: Wire connection"] --> B["Step 2: Welding"]
    B --> C["Step 3: Welding"]
    C --> D["Step 4: Welding"]
    D --> E["Step 5: Welding"]

4 Connect the cable to the corresponding terminal, as shown in the figure below.

graph TD
    A["Switch"] --> B["Transformer"]
    B --> C["Circuit breaker"]
    D["Control Panel"] --> B
    E["Nominal voltage: 800Vac\nNominal current: ±2A"] --> B
    F["Nominal voltage: 800Vac\nNominal current: ±2A"] --> B
    G["Terminal"] --> B

figure 5-9 Three-phase three-wire method

The coupling point for connecting the PLC cable to the box-type transformer busbar is recommended to be arranged in the position corresponding to the middle of the busbar.

• For parameters of the circuit breaker on the box-type transformer side, you may refer to the parameters of EMU200A's internal circuit breaker in the above figure.
• Please pay attention to the phase sequence of cables and terminals in the wiring process.

5 Fasten the cables with screws after confirming the cables are properly prepared. Tightening torque: 5.5N·m

6 Commissioning

6.1 Inspection Before Commissioning

Check the following items before starting the inverter:

• All equipment has been reliably installed.
• DC switch(es) and AC circuit breaker are in the "OFF" position.
• The ground cable is properly and reliably connected.

- The AC cable is properly and reliably connected.

- The DC cable is properly and reliably connected.

- The communication cable is properly and reliably connected.

• The unused terminals are sealed.

- No foreign items, such as tools, are left on the top of the machine or in the junction box (if there is).

- The AC circuit breaker is selected in accordance with the requirements of this manual and local standards.

- All warning signs & labels are intact and legible.

6.2 Commissioning Procedure

If all of the items mentioned above meet the requirements, proceed as follows to start up the inverter for the first time.

step 1 Rotate one DC switch of the inverter to the "ON" position. When the indicator blinks blue slowly, turn the other DC switches to the "ON" position.

NOTICE

- Strictly follow the preceding sequence. Otherwise, the product may be damaged, and the loss caused is not covered by the warranty.

- If the DC side is powered up while the AC side is not, the inverter will report a fault named “Grid Power Outage” (the fault information can be viewed on the iSolarCloud App, see “Records” for details). The fault is automatically cleared when the AC circuit breaker between the inverter and the grid is closed.

- Before closing the AC circuit breaker between the inverter and the power grid, use a multimeter that is set to the AC gear to ensure that the AC voltage is within the specified range. Otherwise, the inverter may be damaged.

step 2 Close the AC circuit breaker between the inverter and the grid.

step 3 Install the iSolarCloud App, see 7.2 Installing App for details.

step 4 Set initial protection parameters via the iSolarCloud App when the inverter is connected to the grid for the first time (see Step 4 in 7.3.2 Login Procedure for details). If the irradiation and grid conditions meet requirements, the inverter normally operates.

step 5 The home page is automatically displayed when the setting is completed. The indicator is steady blue, and the inverter is in grid-connected operation.

WARNING

It is strictly forbidden to close the DC switch if the inverter is in grid-connected status. Otherwise, the inverter may be damaged due to the lack of insulation impedance detection, and the loss caused is not covered by the warranty.

--End

7 iSolarCloud App

7.1 Brief Introduction

The iSolarCloud App can establish communication connection to the inverter via the Bluetooth, thereby achieving near-end maintenance on the inverter. Users can use the App to view basic information, alarms, and events, set parameters, or download logs, etc.

Screenshots in this manual are based on the Android system V2.1.6, and the actual interfaces may differ.

7.2 Installing App

Method 1

Download and install the App through the following application stores:

• MyApp (Android, mainland China users)
• Google Play (Android, users other than mainland China ones)
- App Store (iOS)

Method 2

Scan the following QR code to download and install the App according to the prompt information.

The App icon appears on the home screen after installation.

Weather icon showing a cloud with rays on orange background (no text or symbols)

7.3 Login

7.3.1 Requirements

The following requirements should be met:

• The AC or DC side of the inverter is powered-on.
- The mobile phone is within 5 meters away from the inverter and there are no obstructions in between.
- The Bluetooth function of the mobile phone is enabled.

The inverter can only pair with one phone at a time through Bluetooth.

7.3.2 Login Procedure

step 1 Open the App to enter the login page, tap Local Access at the bottom of the page to go to the next page.
step 2 Establish the Bluetooth connection by either of the two following ways. If the LED indicator flashes blue, the connection is successfully established.

• Scan the QR code on the side of the inverter for Bluetooth connection.
• Tap "Manual connection" and select "Others" at the bottom of the page, the Bluetooth search page will automatically pop up, and select the inverter to be connected according to the SN on the nameplate on the side of the inverter body.

graph TD
    A["SUNGROW\nWelcome to iSolarCloud"] --> B["Login\nVisitor Login\nRegister\nLocal Access\nWLAN Configuration"]
    B --> C["SCAN TO CONNECT\nScan the QR code on the device to connect the device.\nif there is no QR code or this code cannot be identified,\nplease select "Manual connection".\nQR code not found\nMANUAL CONNECTION""]
    C --> D["Bluetooth Search\nNearby Bluetooth Device(0)\n82210504867\nSEARCH DEVICE"]
    D --> E["Back\nWiFi\nWiFi-P2\nEyeM4\nLogger1000\nEMS300CP\nBluetooth\nEyeS4\nEyeWAB5\nCaspers"]

figure 7-1 Bluetooth Connection

step 3 Enter the identity verification interface after the Bluetooth connection is established.

figure 7-2 Login

The Account is "user", and the initial password is "pw1111" or "111111" which should be changed for the consideration of account security.

To set inverter parameters related to grid protection and grid support, contact your distributor to obtain the advanced account and corresponding password. If the distributor is unable to provide the required information, contact SUNGROW.

step 4 If the inverter is not initialized, you will enter the quick setting interface of initializing protection parameters.

graph LR
    A["INITIALIZE PROTECTION PARAM..."] --> B["CREATE TRANSITION"]
    B --> C["CREATE TRANSITION"]
    C --> D["CREATE TRANSITION"]
    D --> E["CREATE TRANSITION"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333

figure 7-3 Initialization Protection Parameter

NOTICE

The Country/Region must be set to the country where the inverter is installed. Otherwise, the inverter may report errors.

step 5 After finishing the settings, tap TUNR ON DEVICE at the upper right corner and the device will be initialized. The App will send start instructions and the device will start and operate.

step 6 If the inverter is initialized, the App automatically turns to its home page.

--End

7.4 Function Overview

The App provides parameter viewing and setting functions, as shown in the following figure.

graph TD
    A["iSolarCloud"] --> B["Home"]
    A --> C["Running information"]
    A --> D["Record"]
    A --> E["More"]
    C --> F["Fault and Record"]
    D --> G["Yield Record"]
    D --> H["Event Record"]
    E --> I["Settings"]
    E --> J["Firmware Update"]
    E --> K["Modify Password"]
    I --> L["System Parameters"]
    I --> M["Operation Parameter"]
    I --> N["Power Regulation Parameters"]
    I --> O["Communication Parameter"]
    L --> P["Running Time"]
    M --> Q["PID Parameters"]
    N --> R["Active Power Regulation"]
    N --> S["Reactive Power Regulation"]
    O --> T["Serial Port Parameters"]
    O --> U["MPLC Parameters"]

figure 7-4 App Function Tree Map

7.5 Home

After login, the home page is as follows:

figure 7-5 Home Page

table 7-1 Home Page Description

No. Designation Description
1 Date and time System date and time of the inverter
2 Inverter state	Present operation state of the inverter. For details, refer to table 7-2 Description of Inverter State.
3 PID function state	Present state of the PID function. For details, refer to table 7-3 Description of PID Function State
4 Power flow chart	Display the PV power generation power, feed-in power, etc.The line with an arrow indicates energy flow between connected devices, and the arrow pointing indicates energy flow direction.
5 Real-time power Output power of the inverter
6 Power generation	Today power yield and accumulative power yield of the inverter
7 Power curve	Curve showing change of power between 5 am and 23 pm every day(Each point on the curve represents the percentage of present inverter power to rated power)
8 Navigation bar	Including Home, Run Information, Records, and More

table 7-2 Description of Inverter State

State Description
Run	After being energized, inverter tracks the PV arrays' maximum power point (MPP) and converts the DC power into AC power. This is the normal operation mode.
Stop Inverter is stopped.
Press to Shut Down	Inverter will stop operation by tapping "Stop" via app. In this way, inverter internal DSP stops. Restart the inverter via app if needed.
Standby	Inverter enters standby mode when DC side input is insufficient. In this mode inverter will wait within the standby duration.
Initial standby The inverter is in the initial power-on standby state.
Starting up The inverter is initializing and synchronizing with the grid.
Warn run Warning information is detected.
Derating running	The inverter derates actively due to environmental factors such as temperature or altitude
Dispatch Running	The inverter runs according to the scheduling instructions received from the monitoring background
Shut down	If a fault occurs, inverter will automatically stop operation, the AC relay acts. The fault information will be displayed on the app. Once the fault is removed in recovery time, inverter will automatically resume running.

table 7-3 Description of PID Function State

State Description
PID recovery running	The inverters perform PID recovery actively.
PID abnormality	It is detected that the ISO impedance is abnormal or the PID function cannot work normally after the PID function is enabled.

If the inverter is running abnormally, the alarm or fault icon will be displayed in the lower right corner of the inverter icon in power flow chart. The user can tap this icon to enter the alarm or fault interface to view detailed information and corrective measures.

7.6 Run Information

Tap Run Information in the navigation bar to enter the corresponding interface. Swipe upward to view details.

The run information includes the PV information, the inverter information, and input and output information.

table 7-4 Run Information

Classifica-tion	Parameter Name Description
PV Information	String n Voltage The input voltage of String n
	String n Current The input current of String n
Inverter Information	Total On-grid Run-ning Time	/
	Daily On-grid Run-ning Time	/
	Negative Voltage to Ground	Inverter DC side negative to ground voltage value
	Bus Voltage	Voltage between the positive and negative poles of the DC side of the inverter
	Internal Air Temperature	/
	Array Insulation Resistance	Insulation resistance value of the input side to the protection ground
	Country/Region /
	Power Limitation Mode	/
	Reactive Power Mode /
Input	Total DC Power DC side total input power
	MPPT x Voltage	The input voltage of MPPT x
	MPPT x Current	The input current of MPPT x
Output	Daily Yield	/
	Monthly Yield	/
	Annual Yield	/
	Total Active Power	Current active power value of the inverter
	Total Reactive Power	Current reactive power value of the inverter
	Total Apparent Power	Current apparent power value of the inverter
	Total Power Factor	Power factor of the AC side of the inverter
	Grid Frequency	Frequency of the AC side of the inverter
	A-B Line Voltage	Line voltage
	B-C Line Voltage
	C-A Line Voltage
	Phase A Current	Phase current
	Phase B Current

Classification	Parameter Name Description
	Phase C Current

7.7 Records

Tap Records on the navigation bar to enter the interface showing event records, as shown in the following figure.

figure 7-6 Records

Fault Alarm Record

Tap Fault Alarm Record to enter the interface, as shown in the following figure.

figure 7-7 Fault Alarm Record

Tap to select a time segment and view corresponding records. The inverter can record up to 400 latest entries.

Select one of the records in the list and tap the record to view the detailed fault information as shown in following figure.

figure 7-8 Detailed Fault Alarm Information

Yield Record

Tap Yield Record to enter the interface showing daily power generation as shown in the following figure.

figure 7-9 Power Curve

The App displays power generation records in a variety of forms, including daily power generation histogram,, monthly power generation histogram, annual power generation histogram and total power generation histogram.

table 7-5 Yield Record Explanation

Parameter Description
Power curve	Show the power output from 5 am to 11 pm in a single day. Each point on the curve represents the percentage of present inverter power to rated power.

Parameter Description

Daily yield histogram	Shows the power output every day in the present month.
Monthly yield histogram	Shows the power output every month in a year.
Annual yield histogram	Shows the power output every year.

Tap the time bar on the top of the interface to select a time segment and view the corresponding power curve.

Swipe left to check the power yields histogram.

Event Record

Tap Event Record to view event record list.

Tap to select a time segment and view corresponding records. The inverter can record up to 400 latest entries.

7.8 More

Tap More on the navigation bar to enter the corresponding interface, as shown in the following figure.

figure 7-10 More

7.8.1 System Parameters

Tap Settings > System Parameters to enter the corresponding interface, as shown in the following figure.

figure 7-11 System Parameters

* The image shown here is for reference only.

Boot/Shutdown

Tap Boot/Shutdown to send the boot/shutdown instruction to the inverter.

Date Setting/Time Setting

The correct system time is very important. Wrong system time will directly affect the data logging and power generation value. The clock is in 24-hour format.

Software Version

Version information of the current firmware.

7.8.2 Operation Parameters

Running Time

Tap Settings > Operation Parameters > Running Time to enter the corresponding interface.

figure 7-12 Running Time

PID Parameters

Tap Settings > Operation Parameters > PID Parameters to enter the corresponding interface.

PID PARAMETERS

figure 7-13 PID Parameters

table 7-6 PID Parameter Description

Parameter Description
Availability of Q at Night during PID Recovery	If this switch is turned on, PID recovery and Q at night can be enabled at the same time, but can not work at the same time.
PID Recovery*	Enable/Disable the PID night recovery function. Once enabled, it works between 22:00 pm and 5:00 am by default.
Anti PID	Enable this function of the inverter to protect PV modules from PID effect during the daytime
Clear PID Alarm	If ISO impedance abnormality or PID function exception is detected during running of the PID function, the inverter reports a PID abnormality and reminds the user to take corresponding measures. Clear the alarm report via this parameter once the problems are handled.
PID Scheme Apply negative or positive voltage.
Full-Day PID Sup-pression	Enable this function to enable both PID recovery and anti PID.

*:Please enable both "Availability of Q at Night during PID Recovery" and "PID Recovery" to turn on the PID recovery.

NOTICE

Please ensure that the inverter is equipped with DC PID before setting PID parameters. If it is equipped with AC PID, please refer to the EMU200A user manual for PID parameter settings. The PID type of the inverter is subject to the actually received inverter.

7.8.3 Power Regulation Parameters

Active Power Regulation

Tap Settings > Power Regulation Parameters > Active Power Regulation to enter the interface, as shown in the following figure.

figure 7-14 Active Power Regulation

table 7-7 Active Power Regulation

Parameter	Definition/Setting Description	Range
Active Power Soft Start after Fault	The switch for enabling/disabling the soft start function after a fault occurs.	Enable/Disable
Active Power Soft Start Time after Fault	Time that the soft start takes to raise the power from 0 to 100% rated power.	1s~1200s
Active Power Gradient Control	Select whether to allow setting the active power rate.	Enable/Disable
Active Power Decline Gradient	The decline rate of inverter active power per minute.	1%/min~6000%/min
Active Power Rising Gradient	The rise rate of inverter active power per minute.	1%/min~6000%/min
Active Power Setting Persistence	Select whether to retain the output limited power settings	Enable/Disable
Active Power Limit	The switch for limiting output power.	Enable/Disable
Active Power Limit Ratio	The ratio of limiting output power to rated power in percentage.	0%~110%
Shutdown When Active Power Limit to 0%	Select whether to shut down the inverter when the limited power reaches 0.	Enable/Disable
100% Scheduling to achieve active overload	Switch used to ensure that the inverter operates at the maximum active power when the active power limit ratio is set over 100%.	Enable/Disable

Reactive Power Regulation

Tap Settings > Power Regulation Parameters > Reactive Power Regulation to enter the screen, as shown in the following figure.

figure 7-15 Reactive Power Regulation

table 7-8 Reactive Power Regulation

Parameter	Definition/Setting Description	Range
Reactive power generation at night	Switch for enabling/disabling night SVG function.	Enable/Disable
Reactive power ratio at night	Reactive power ratio set for the night SVG function.	-100%~0%/0%~100%
Reactive power setting persistence	Switch for enabling/disabling the power-off function during reactive power.	Enable/Disable
Reactive closed-loop control	Switch for enabling/disabling the closed-loop control during reactive power.	Enable/Disable
Reactive power regulation mode	Switch for selecting reactive power regulation mode	Off/PF/Qt/Q(P)/Q(U)

The inverter provides the reactive power regulation function. Enable this function under Reactive Power Regulation Mode and select the appropriate mode.

table 7-9 Reactive Power Regulation:

Mode Descriptions

Off The PF is fixed at +1.000.

PF The reactive power can be regulated by the parameter PF (Power Factor).

Qt The reactive power can be regulated by the parameter Q-Var limits (in %).

Q(P) The PF changes with the output power of the inverter.

Q(U) The reactive power changes with the grid voltage.

"Off" Mode

The reactive power regulation function is disabled. The PF is limited to +1.000.

"PF" Mode

The power factor is fixed and reactive power setpoint is calculated according to the current power. The range of PF is (-1.0 to -0.8) and (+0.8 to +1.0).

Leading: The inverter supplies reactive power to the grid.

Lagging: The inverter absorbs reactive power from the grid.

"Qt" Mode

In the Qt mode, system rated reactive power is fixed, and the system injects reactive power according to the delivered reactive power ratio. The Reactive Power Ratio is set through the App.

The setting range of the reactive power ratio is 0\~100% for inductive reactive power regulation or 0\~-100% for capacitive reactive power regulation.

"Q(P)" Mode

The PF of the inverter output varies in response to the output power of the inverter.

table 7-10 "Q(P)" Mode Parameter Descriptions:

Parameter Definition/Setting Description Range
Reactive Response	Switch for enabling/disabling reactive response	Enable/Disable
Reactive Response Time	Completion time of reactive response	0.1s~600.0s
Q(P) Curve	Select corresponding curve according to local regulations	A, B, C*
QP_P1	Output power at P1 on the Q(P) mode curve (in percentage)	0 ~ 100%
QP_P2	Output power at P2 on the Q(P) mode curve (in percentage)	20% ~ 100%
QP_P3	Output power at P3 on the Q(P) mode curve (in percentage)	20% ~ 100%

Parameter Definition/Setting Description Range

QP_K1 Power factor at P1 on the Q(P) mode curve		Curve A/C: 0.8 ~ 1
QP_K2 Power factor at P2 on the Q(P) mode curve		Curve B: [-0.600~0-.600]*Active Over-load Rate/1000
QP_K3 Power factor at P3 on the Q(P) mode curve
QP_EnterVoltage	Voltage percentage for Q(P) function activation	100% ~ 110%
QP_ExitVoltage	Voltage percentage for Q(P) function deactivation	90% ~ 100%
QP_ExitPower	Power percentage for Q(P) function deactivation	1% ~ 100%
QP_EnableMode	Unconditional activation/deactivation of Q(P) function	Yes / No

* Curve C is reserved and consistent with Curve A currently.

figure 7-16 Q(P) Curve

"Q(U)" Mode

table 7-11 "Q(U)" Mode Parameter Descriptions:

Parameter Definition/Setting Description Range
Reactive Response	Switch for enabling/disabling reactive response	Enable/Disable
Reactive Response Time	Completion time of reactive response 0.1s~600.0s
Q(U) Curve	Select corresponding curve according to local regulations	A, B, C*
Hysteresis Ratio	Voltage hysteresis ratio on the Q(U) mode curve	0 ~ 5%
QU_V1	Grid voltage limit at P1 on the Q(U) mode curve	80% ~ 100%
QU_Q1 Value of Q/Sn at P1 on the Q(U) mode curve		[-60.0%-0]* Over-load Rate/ 1000
QU_V2	Grid voltage limit at P2 on the Q(U) mode curve	80% ~ 100%
QU_Q2 Value of Q/Sn at P2 on the Q(U) mode curve		[-60.0%-60.0%]* Overload Rate/1000
QU_V3	Grid voltage limit at P3 on the Q(U) mode curve	100% ~ 120%
QU_Q3 Value of Q/Sn at P3 on the Q(U) mode curve		[-60.0%-60.0%]* Overload Rate/1000
QU_V4	Grid voltage limit at P4 on the Q(U) mode curve	100% ~ 120%
QU_Q4 Value of Q/Sn at P4 on the Q(U) mode curve		[0-60.0%]* Over-load Rate/ 1000
QU_EnterPower Active power for Q(U) function activation 20% ~ 100%
QU_ExitPower Active power for Q(U) function deactivation 1% ~ 20%
QU_EnableMode	Unconditional activation/deactivation of Q(U) function	Yes / No / Yes, Limited by PF
QU_Limited PF Val-ue	PF value for Q(U) function activation 0~1.00

* Curve C is reserved and consistent with Curve A currently.

figure 7-17 Q(U) Curve

7.8.4 Communication Parameters

Serial Port Parameters

Tap Settings > Communication Parameters > Serial Port Parameters to enter the corresponding interface, as shown in the following figure.

SERIAL PORT PARAMETERS

Device Address

figure 7-18 Serial Port Parameters

table 7-12 Serial Port Parameters

Parameter Range

Device Address 1–246

MPLC Parameters

Tap Settings > Communication Parameters > MPLC Parameters to enter the corresponding interface, as shown in the following figure.

figure 7-19 MPLC Parameters

table 7-13 MPLC Parameters

Parameter Range

Band Num Band1, Band2

Array ID 1–255

Winding ID 1–10

7.8.5 Firmware Update

To avoid download failure due to poor on-site network signal, it is recommended to download the firmware package to the mobile device in advance.

step 1 Enable the "Mobile data" of the mobile device.
step 2 Open the App, enter the account and password on the login interface. Tap Login to enter the home interface.
step 3 Tap More > Firmware Download to enter corresponding interface on which you can view the device list.
step 4 Select the device model before downloading the firmware. Tap the device name in the device list to enter the firmware upgrade package detail interface, and tap behind the firmware upgrade package to download it.

step 5 Return to the Firmware Download interface, tap ↓ in the upper right corner of the interface to view the downloaded firmware upgrade package.

step 6 Login the App via local access mode. Refer to 7.3 Login.

step 7 Tap More on the App home interface and then tap Firmware Update.

step 8 Tap the upgrade package file, a prompt box will pop up asking whether to upgrade the firmware with the file, tap CONFIRM to perform the firmware upgrade.

step 9 Wait for the file to be uploaded. When the upgrade is finished, a message is displayed indicating that the upgrade is completed. Tap Complete to end the upgrade.

--End

7.8.6 Password Changing

Tap Modify Password to enter the modify password interface, as shown in the following figure.

figure 7-20 Modify Password

The password shall consist of 8–20 digits, including letters and numbers.

8 Troubleshooting and Maintenance

8.1 Troubleshooting

Once the inverter fails, the fault information is displayed on the App interface. If the inverter is equipped with an LCD screen, the fault information can be viewed on it.

The fault codes and troubleshooting methods of all PV inverters are detailed in the table below, and only some of the faults may occur to the model you purchased. When a fault occurs, you can check the fault information according to the fault code on the mobile app.

Fault Code Fault Name Corrective Measures

2, 3, 14, 15 Grid Overvoltage

Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:1. Measure the actual grid voltage, and contact the local electric power company for solutions if the grid voltage is higher than the set value.2. Check whether the protection parameters are appropriately set via the App or the LCD. Modify the overvoltage protection values with the consent of the local electric power operator.3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

4, 5 Grid Undervoltage

Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:1. Measure the actual grid voltage, and contact the local electric power company for solutions if the grid voltage is lower than the set value.2. Check whether the protection parameters are appropriately set via the App or the LCD.3. Check whether the AC cable is firmly in place.4. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

Fault Code Fault Name Corrective Measures

8	Grid Overfrequen-cy	Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:1. Measure the actual grid frequency, and contact the local electric power company for solutions if the grid frequency is beyond the set range.2. Check whether the protection parameters are appropriately set via the App or the LCD.3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
9	Grid Underfrequen-cy
10 Grid Power Outage		Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:1. Check whether the grid supplies power reliably.2. Check whether the AC cable is firmly in place.3. Check whether the AC cable is connected to the correct terminal (whether the live wire and the N wire are correctly in place).4. Check whether the AC circuit breaker is connected.5. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
12	Excess Leakage Current	1. The fault can be caused by poor sunlight or damp environment, and generally the inverter will be reconnected to the grid after the environment is improved.2. If the environment is normal, check whether the AC and DC cables are well insulated.3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
13 Grid Abnormal		Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:1. Measure the actual grid, and contact the local electric power company for solutions if the grid parameter exceeds the set range.2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

Fault Code Fault Name Corrective Measures

17	Grid Voltage Imbalance	Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:1. Measure the actual grid voltage. If grid phase voltages differ greatly, contact the electric power company for solutions.2. If the voltage difference between phases is within the permissible range of the local power company, modify the grid voltage imbalance parameter through the App or the LCD.3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
28, 29, 208, 212, 448-479	PV Reserve Connection Fault	1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops below 0.5 A.2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.*The code 28 to code 29 are corresponding to PV1 to PV2 respectively.*The code 448 to code 479 are corresponding to string 1 to string 32 respectively.
532-547, 564-579	PV Reverse Connection Alarm	1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops below 0.5 A.2. Contact Sungrow Customer Service if the preceding causes are ruled out and the alarm persists.*The code 532 to code 547 are corresponding to string 1 to string 16 respectively.*The code 564 to code 579 are corresponding to string 17 to string 32 respectively.

Fault Code Fault Name Corrective Measures

548-563, 580-595	PV Abnormal Alarm	Check whether the voltage and current of the inverter is abnormal to determine the cause of the alarm.1. Check whether the corresponding module is sheltered. If so, remove the shelter and ensure module cleanness.2. Check whether the battery board wiring is loose, if so, make it reliably connected.3. Check if the DC fuse(if there is fuse between PV string and inverter DC input) is damaged. If so, replace the fuse.4. Contact Sungrow Customer Service if the preceding causes are ruled out and the alarm persists.*The code 548 to code 563 are corresponding to string 1 to string 16 respectively.*The code 580 to code 595 are corresponding to string 17 to string 32 respectively.
37	Excessively High Ambient Temperature	Generally, the inverter will resume operation when the internal or module temperature returns to normal. If the fault persists:1. Check whether the ambient temperature of the inverter is too high;2. Check whether the inverter is in a well-ventilated place;3. Check whether the inverter is exposed to direct sunlight. Shield it if so;4. Check whether the fan is running properly. Replace the fan if not;5. Contact Sungrow Power Customer Service if the fault is due to other causes and the fault persists.
43	Excessively Low Ambient Temperature	Stop and disconnect the inverter. Restart the inverter when the ambient temperature rises within the operation temperature range.

Fault Code Fault Name Corrective Measures

39	Low System Insulation Resistance	Wait for the inverter to return to normal. If the fault occurs repeatedly:1. Check whether the ISO resistance protection value is excessively high via the app or the LCD, and ensure that it complies with the local regulations.2. Check the resistance to ground of the string and DC cable. Take corrective measures in case of short circuit or damaged insulation layer.3. If the cable is normal and the fault occurs on rainy days, check it again when the weather turns fine.4. If there are batteries, check whether battery cables are damaged and whether terminals are loose or in poor contact. If so, replace the damaged cable and secure terminals to ensure a reliable connection.5. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
106	Grounding Cable Fault	1. Check whether the AC cable is correctly connected.2. Check whether the insulation between the ground cable and the live wire is normal.3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
88 Electric Arc Fault		1. Disconnect the DC power supply, and check whether any DC cable is damaged, the connection terminal or fuse is loose or there is a weak contact. If so, replace the damaged cable, fasten the terminal or fuse, and replace the burnt component.2. After performing step 1, reconnect the DC power supply, and clear the electric arc fault via the App or the LCD, after that the inverter will return to normal.3. Contact Sungrow Customer Service if the fault persists.

Fault Code Fault Name Corrective Measures

84	Reverse Connec-tion Alarm of the Meter/CT	1. Check if the meter is wrongly connected.2. Check if the input and output wiring of the meter is reversed.3. If the existing system is enabled, please check if the rated power setting of the existing inverter is correct.
514	Meter Communi-cation Abnormal Alarm	1. Check whether the communication cable and the terminals are abnormal. If so, correct them to ensure reliable connection.2. Reconnect the communication cable of the me-ter.3. Contact Sungrow Customer Service if the pre-ceding causes are ruled out and the alarm persists.
323 Grid Confrontation		1. Check whether the output port is connected to actual grid. Disconnect it from the grid if so.2. Contact Sungrow Customer Service if the pre-ceding causes are ruled out and the fault persists.
75	Inverter Paral-lel Communication Alarm	1. Check whether the communication cable and the terminals are abnormal. If so, correct them to ensure reliable connection.2. Reconnect the communication cable of the me-ter.3. Contact Sungrow Customer Service if the pre-ceding causes are ruled out and the alarm persists.
7, 11, 16, 19–25,30–34, 36, 38,40–42, 44–50,52–58, 60–69,85, 87, 92, 93,100–105, 107–114, 116–124,200–211, 248–255, 300–322,324–328, 401–412, 600–603,605, 608, 612,616, 620, 622–624, 800, 802,804, 807, 1096–1122System Fault	1. Wait for the inverter to return to normal.2. Disconnect the AC and DC switches, and dis-connect the battery side switches if there are bat-teries. Close the AC and DC switches in turn 15 minutes later and restart the system.3. Contact Sungrow Customer Service if the pre-ceding causes are ruled out and the fault persists.
Fault Code Fault Name Corrective Measures
59, 70–74, 76–83, 89, 216–218, 220–233, 432–434, 500–513, 515–518, 635–638, 900, 901, 910, 911, 996	System Alarm	1. The inverter can continue running.2. Check whether the related wiring and terminal are abnormal, check whether there are any foreign materials or other environmental abnormalities, and take corresponding corrective measures when necessary.3. If the fault persists, please contact Sungrow Power Customer Service.
264-283	MPPT Reverse Connection	1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops below 0.5 A.2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.*The code 264 to code 279 are corresponding to string 1 to string 20 respectively.
332-363	Boost Capacitor Overvoltage Alarm	1. The inverter can continue running.2. Check whether the related wiring and terminals are abnormal, check whether there are any foreign materials or other environmental abnormalities, and take corresponding corrective measures when necessary.If the fault persists, please contact Sungrow Power Customer Service.
364-395	Boost Capacitor Overvoltage Fault	1. Disconnect the AC and DC switches, and disconnect the battery side switches if there are batteries. Close the AC and DC switches in turn 15 minutes later and restart the system.2. If the fault persists, please contact Sungrow Power Customer Service.

Fault Code Fault Name Corrective Measures

1548-1579	String Current Reflux	1. Check whether the number of PV modules of the corresponding string is less than other strings. If so, disconnect the DC switch and adjust the PV module configuration when the string current drops below 0.5 A.2. Check whether the PV module is shaded;3. Disconnect the DC switch to check whether the open circuit voltage is normal when the string current drops below 0.5 A. If so, check the wiring and configuration of the PV module,4. Check whether the orientation of the PV module is abnormal.
1600 - 1615, 1632 - 1655	PV Grounding Fault	1. When the fault occurs, it is forbidden to directly disconnect the DC switch and unplug PV terminals when the direct current is greater than 0.5 A;2. Wait until the direct current of the inverter falls below 0.5 A, then disconnect the DC switch and unplug the faulty strings;3. Do not reinsert the faulty strings before the grounding fault is cleared;4. If the fault is not caused by the foregoing reasons and still exists, contact Sungrow Customer Service.
1616	System Hardware Fault	1. It is prohibited to disconnect the DC switch when the DC current is greater than 0.5 A when the fault occurs.2. Disconnect the DC switch only when the inverter DC side current drops below 0.5 A.3. It is prohibited to power up the inverter again. Please contact Sungrow Customer Service.

Contact SUNGROW if the measures listed in the “Troubleshooting Method” column have been taken but the problem persists.

8.2 Maintenance

8.2.1 Maintenance Notices

DANGER

Risk of inverter damage or personal injury due to incorrect service!

• Be sure to use special insulation tools when perform high-voltage operations.
• Before any service work, first disconnect the grid-side AC circuit breaker and check the inverter status. If the inverter indicator is off, please wait until night to disconnect the DC switch. If the inverter indicator is on, directly disconnect the DC switch.
• After the inverter is powered off for 5 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter
• Even if the inverter is shut down, it may still be hot and cause burns. Wear protective gloves before operating the inverter after it cools down.

DANGER

When maintaining the product, it is strictly prohibited to open the product if there is an odor or smoke or if the product appearance is abnormal. If there is no odor, smoke, or obvious abnormal appearance, repair or restart the inverter according to the alarm corrective measures. Avoid standing directly in front of the inverter during maintenance.

CAUTION

To prevent misuse or accidents caused by unrelated personnel: Post prominent warning signs or demarcate safety warning areas around the inverter to prevent accidents caused by misuse.

NOTICE

Restart the inverter only after removing the fault that impairs safety performance.

As the inverter contains no component parts that can be maintained, never open the enclosure, or replace any internal components.

To avoid the risk of electric shock, do not perform any other maintenance operations beyond this manual. If necessary, contact SUNGROW for maintenance. Otherwise, the losses caused is not covered by the warranty.

NOTICE

Touching the PCB or other static sensitive components may cause damage to the device.

• Do not touch the circuit board unnecessarily.
• Observe the regulations to protect against electrostatic and wear an anti-static wrist strap.

8.2.2 Disconnecting the Inverter

CAUTION

Danger of burns!

Even if the inverter is shut down, it may still be hot and cause burns. Wear protective gloves before operating the inverter after it cools down.

For maintenance or other service work, the inverter must be switched off. Proceed as follows to disconnect the inverter. Lethal voltages or damage to the inverter will follow if otherwise.

step 1 Disconnect the external AC circuit breaker and prevent it from inadvertent reconnection.

step 2 Rotate the DC switch to the "OFF" position for disconnecting all of the PV string inputs.

step 3 Wait about 5 minutes until the capacitors inside the inverter completely discharge.

step 4 Ensure that the DC cable is current-free with a current clamp.

--End

8.2.3 Routine Maintenance

Item Method Period

Device clean	Check whether the air outlet and heat sink are blocked by dust and other objects.Check if the air inlet and outlet are normal. Clean the air inlet and outlet, if necessary.	Six months to a year (depend on the dust contents in air)
Fans	Check whether there is a fan alarm on the App.Check whether there is any abnormal noise when the fan is rotating.Clean or replace the fans if necessary (see the following section).	Once a year
Item Method Period
Cable entry	Check whether the cable entry is insufficiently sealed or the gap is excessively large, and reseal the entry when necessary.	Once a year
Electrical connection	Check whether cables are loose or fall off.Check whether the cable is damaged, especially the part in contact with the metal enclosure.	Six months to a year
Surrounding vegetation	Perform inspection and weeding before vegetation wilts.Clean the site promptly after weeding and do not pile the weed up around the device.	Based on the local wilting season

8.2.4 Cleaning Air Inlet and Outlet

A significant amount of heat is generated when the inverter is working.

In order to maintain good ventilation, please check to make sure the air inlet and outlet are not blocked.

Clean the air inlet and outlet with soft brush or vacuum cleaner if necessary.

8.2.5 Fan Maintenance

DANGER

• Power off the inverter and disconnect it from all power supplies before maintaining fans.
• After the inverter is powered off for 5 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.
  • Fan maintenance must be performed by professionals.

Fans inside the inverter are used to cool the inverter during operation. If the fans do not operate normally, the inverter may not be cooled down and inverter efficiency may decrease. Therefore, it is necessary to clean dirty fans and replace the broken fans in a timely manner.

The operation procedure is as follows:

step 1 Stop the inverter (see 8.2.2 Disconnecting the Inverter).

step 2 Loosen the screw on the sealing plate of the fan module.

step 3 Press the tab of the latch hook, unplug the cable connection joint outwards, and loosen the screw on the fan holder.

step 4 Loosen screws on the sides of fans.

step 5 Pull out the fans. Clean them with a soft brush or vacuum cleaner, and replace them when necessary.

Technical illustration of a mechanical assembly showing a step-by-step transformation from a component to a bracket (no text or symbols present)

If there is not enough space, pull out part of the fans and remove the screws between the two fans.

--End

8.2.6 Heat Sink Cleaning

! DANGER

• Power off the inverter and disconnect it from all power supplies before cleaning the heat sink.
• After the inverter is powered off for 5 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.
  • The heat sink can only be cleaned by professionals.

It is important to keep the inverter in good heat dissipation for its highly reliable operation. To ensure proper heat dissipation of the inverter, check the heat sink periodically and clean it with a soft brush if necessary.

The operation procedure is as follows:

step 1 Please refer to Step 1 to Step 5 of the fan maintenance section to remove the fan (see 8.2.5 Fan Maintenance).

step 2 Loosen screws on the rear cover plate of the inverter and pull the rear cover plate out.

Technical diagram showing a device interior with airflow arrows and a 3D schematic view of its internal structure (no text or symbols present)

step 3 Use a soft brush or a vacuum cleaner to clean the heat sink.

Technical line drawing of a mechanical assembly with no visible text or symbols

step 4 After cleaning the heat sink, install the fan and the rear cover plate in reverse steps.

--End

8.3 Inverter Disposal

8.3.1 Dismantling the Inverter

CAUTION

Risk of burn injuries and electric shock!

After the inverter is powered off for 5 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.

• Before dismantling the inverter, disconnect the inverter from both AC and DC power sources.
• If there are more than two layers of inverter DC terminals, dismantle the outer DC connectors before dismantling the inner ones.
• If the original packing materials are available, put the inverter inside them and then seal them using adhesive tape. If the original packing materials are not available, put the inverter inside a cardboard box suitable for the weight and size of this inverter and seal it properly.

step 1 Refer to 5 Electrical Connection, for the inverter disconnection of all cables in reverse steps. In particular, when removing the DC connector, use an MC4 wrench to loosen the locking parts and install waterproof plugs.

step 2 Refer to 4 Mechanical Mounting, to dismantle the inverter in reverse steps.

step 3 If necessary, remove the wall-mounting bracket from the wall.

step 4 If the inverter will be used again in the future, please refer to 3.3 Inverter Storage for a proper conservation.

--End

8.3.2 Disposal of Inverter

Users take the responsibility for the disposal of the inverter.

WARNING

Please scrap the inverter in accordance with relevant local regulations and standards to avoid property losses or casualties.

NOTICE

Some parts of the inverter may cause environmental pollution. Please dispose of them in accordance with the disposal regulations for electronic waste applicable at the installation site.

9 Appendix

9.1 Technical Data

Parameters SG200HX-US
Input (DC)
Max. PV input voltage 1500 V
Min. PV input voltage / Startup input voltage	500 V / 550 V
Nominal PV input voltage 1000 V
MPP voltage range 500 V – 1500 V
Full Power MPP Voltage Range@40°C	850 V - 1300 V *
No. of independent MPP inputs	12
Max. number of PV strings per MPPT	2
Max. PV input current 12 * 40 A
Max. DC short-circuit current per MPPT	60 A
Output (AC)
AC output power 200 kVA @40	°C
Max. AC output current 193A
Nominal AC voltage 3 / PE, 600 V
AC voltage range 528 – 660V
Nominal grid frequency / Grid frequency range	60 Hz / 55 – 65 Hz
THD	< 3 % (at nominal power)
DC current injection	< 0.5 % In
Power factor at nominal power / Adjustable power factor	> 0.99 / 0.8 leading – 0.8 lagging
Feed-in phases / Connection phases	3 / 3
Efficiency
Max. efficiency / CEC efficiency	98.9 % / 98.5%

Parameters SG200HX-US

Protection
DC reverse connection protection	Yes
AC short circuit protection Yes
Leakage current protection Yes
Grid monitoring Yes
Ground fault monitoring Yes
DC switch / AC switch Yes / No
PV string current monitoring Yes
Q at night function Yes
Anti-PID and PID recovery function	Optional
Surge protection DC Type II / AC Type II
General Data
Dimensions (W*H*D) 1165 * 870 * 361 mm (45.9" * 34.3" * 14.2")
Weight*	≤ 120 kg ( ≤ 265 lbs )
Isolation method Transformerless
Degree of protection	IP66 ( NEMA 4X )
Power consumption at night	< 6 W
Operating ambient temperature range	-30 to 60°C(-22 to 140 °F)
Allowable relative humidity range	0 – 100 %
Cooling method Smart forced air cooling
Max. operating altitude	4000 m (> 3000 m derating) / 13123 ft (> 9843 ft derating)
Display	LED, Bluetooth+App
Communication	RS485、SunSpec、Modbus
DC connection type	MC4 (Max. 10AWG, optional 8AWG )
AC connection type	Support OT/DT terminal (Max. 750 Kcmil)
Compliance	UL1741, UL62109-1, CSA C22.2 No.107.1-16, IEEE1547-2018, IEEE1547.1-2020, UL1741 SA/SB, California Rule21,and FCC Part 15 Class A Limit
Grid Support	Q at night function, LVRT, HVRT,active & reactive power control and power ramp rate control, Q-U control, P-f control

*Due to the multi-supplier for some key components, the actual weight may have a ±8% deviation, please refer to the actually delivered product.

*Full power MPP range is temperature dependent, check the characteristic curve of the inverter for more information.

9.2 Wring Distance of DI Dry Contact

The wiring distance between DI dry contact terminals must meet the requirements in the table below. The wiring distance L is the total length of all DI signal cables.

$$ L = 2 \sum_ {k = 1} ^ {n} L _ {k} $$

L_K refers to the cable length in one direction between the DI dry contact terminal of the k ^th inverter and the corresponding terminal of the (k-1) ^th inverter.

table 9-1 Correspondence Between Inverter Quantity and Maximum Wiring Distance

Number of Inverter	Maximum Wiring Distance(unit:m)
	16AWG / 1.31mm2	17AWG / 1.026mm2
1 13030 10552
2 6515 5276
3 4343 3517
4 3258 2638
5 2606 2110
6 2172 1759
7 1861 1507
8 1629 1319
9 1448 1172
10 1303 1055
11 1185 959
12 1086 879
13 1002 812
14 931 754
15 869 703
16 814 660
17 766 621
18 724 586
19 686 555
20 652 528
21 620 502
22 592 480
23 567 459
24 543 440
25 521 422

NOTICE

In case the specification of the cable used is not included in the table above, when there is only one inverter, ensure that the line impedance of the input node is less than 300 ; and when there are multiple inverters connected in the daisy chain, ensure that the impedance is less than 300 /number of inverter.

9.3 Quality Assurance

When product faults occur during the warranty period, SUNGROW will provide free service or replace the product with a new one.

Evidence

During the warranty period, the customer shall provide the product purchase invoice and date. In addition, the trademark on the product shall be undamaged and legible. Otherwise, SUN-GROW has the right to refuse to honor the quality guarantee.

Conditions

• After replacement, unqualified products shall be processed by SUNGROW.
- The customer shall give SUNGROW a reasonable period to repair the faulty device.

Exclusion of Liability

In the following circumstances, SUNGROW has the right to refuse to honor the quality guarantee:

• The free warranty period for the whole machine/components has expired.
  • The device is damaged during transport.
• The device is incorrectly installed, refitted, or used.
• The device operates in harsh conditions beyond those described in this manual.

• The fault or damage is caused by installation, repairs, modification, or disassembly performed by a service provider or personnel not from SUNGROW.

• The fault or damage is caused by the use of non-standard or non-SUNGROW components or software.

• The installation and use range are beyond stipulations of relevant international standards.
• The damage is caused by unexpected natural factors.

For faulty products in any of above cases, if the customer requests maintenance, paid maintenance service may be provided based on the judgment of SUNGROW.

Product data such as product dimensions are subject to change without prior notice. The latest documentation from SUNGROW should take precedence in case of any deviation.

9.4 Contact Information

In case of questions about this product, please contact us.

We need the following information to provide you the best assistance:

• Model of the device
- Serial number of the device
- Fault code/name
- Brief description of the problem

For detailed contact information, please visit: https://en.sungrowpower.com/contactUS