Battery communication error
The inverter can no longer exchange data with the battery or BMS, so stored energy cannot be managed.
Common causes
- Communication cable between inverter and battery loose or damaged
- Communication protocol or battery brand setting changed wrongly
- Battery or BMS not powered
- Firmware mismatch between inverter and battery
Safe checks
- 1Check that the battery and BMS indicators show power.
- 2Verify the communication cable at both ends is fully seated without opening enclosures.
- 3Note the code so your installer can compare it with the battery protocol configuration.
- 4Do not change battery settings you do not understand — incorrect settings can affect warranty.
When to call a technician
Call a qualified technician if the device repeats the fault after a manufacturer-approved restart, shows a burning smell, has damaged or discoloured wiring, or if the symptom involves the battery, inverter power stage or any sealed high-voltage component.