AJ Series - Inverter STUDER - Free user manual and instructions
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| Product type | Inverter / battery charger |
| Brand | STUDER |
| Model | AJ Series |
| Category | Inverter |
| Output voltage | 230 V AC / 50 Hz |
| Rated power | 3000 VA (depending on version) |
| Waveform | Pure sine wave |
| Battery input voltage | 24 V / 48 V DC |
| Maximum charge current | 50 A |
| Efficiency | 90% in converter mode |
| Dimensions (L x H x D) | 400 x 150 x 250 mm |
| Weight | 15 kg |
| Power supply | External battery (not supplied) |
| Display | LCD screen for monitoring |
| Main functions | DC/AC conversion, automatic charger, load transfer |
| Protections | Overload, short circuit, high temperature, battery undervoltage |
| Cooling | Temperature-controlled fan |
| Maintenance and cleaning | Dust with a dry cloth, check connections |
| Safety | Use indoors, respect polarity, mandatory grounding |
| Spare parts and repairability | Electronic boards and fans available on request |
| General information | CE compliant, 2-year warranty |
Frequently Asked Questions - AJ Series STUDER
What is the difference between the AJ Series and a simple inverter?
The AJ Series is an inverter/charger: it converts DC current from batteries into 230 V AC, but also integrates an automatic charger to recharge the batteries via the mains.
How to install the AJ Series for off-grid use?
Connect the batteries to the DC terminals respecting polarity, then plug your devices into the AC output. Make sure you have correct wiring and compliant grounding.
What cable cross-section is recommended for the battery connection?
For a power of 3000 VA, use a cross-section of 50 mm² (or adapted to the distance) and properly crimped lugs to avoid overheating.
Does the AJ Series work with all types of batteries?
It is compatible with lead-acid, GEL and AGM batteries. For lithium batteries, check the voltage and compatibility of the charging profile.
What to do in case of overload or short circuit?
The device automatically shuts down and displays an error code. Unplug the devices, wait a few minutes then reset by cutting off the battery power.
How to maintain the inverter to prolong its lifespan?
Regularly clean the ventilation grilles with a dry cloth, check the condition of the connections, and make sure the batteries are well ventilated.
Can I use the AJ Series in parallel with the mains?
Yes, the bypass function transfers the load to the grid when voltage is present, and automatically switches to battery in the event of a power outage.
What is the noise level of the fan?
The fan is variable speed and only activates when needed. At rest, the device is silent; during charging it may emit about 45 dB.
Where can I find spare parts for the AJ Series?
Spare parts are available from STUDER's after-sales service or via authorized distributors. Contact support with the device's serial number.
What is the legal warranty of the inverter?
The manufacturer's warranty is 2 years (parts and labor). The statutory warranty of conformity also applies according to local legislation.
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USER MANUAL AJ Series STUDER
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Product information
Brand : STUDER
Model : AJ Series
Category : Inverter