Sigenergy
1012
Grid Undervoltage
Grid voltage below undervoltage threshold. ID1=Level I, ID2=Level II, ID3=Level III.
Common causes
Grid voltage too lowGrid instabilityLoose AC connections
What to check
STEP 1
Inverter will reconnect when grid returns to normal. Measure actual grid voltage
STEP 2
If voltage consistently low, contact local power operator. Check APP protection parameter settings
Escalate if
Grid voltage is within range but fault persists — submit fault feedback via APP > Service > Troubleshooting
Need full interactive diagnosis?
Faultpath walks you through decision trees, fault codes, and commissioning — built for solar & battery engineers.
Open Faultpath
More Sigenergy fault codes