Sigenergy
2003

Over-Temperature

ID1=High temperature of power module, ID2=High temperature of battery module.

Ambient temperature too highPoor ventilationDirect sunlight exposureInternal power module malfunction causing abnormal heating
STEP 1
Check ventilation at installation location is good and not obstructed
STEP 2
Check device is not exposed to direct sunlight and improve if so
Fault persists after environmental checks — submit fault feedback via APP > Service > Support > Troubleshooting
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More Sigenergy fault codes

1001
Software Version Mismatch
1002
Low Insulation Resistance
1003
Over-Temperature
1004
Equipment Fault
1005
System Grounding Fault