Residual current exceeds protection threshold — safety feature to prevent electric shock hazard. May self-clear in dry conditions. Displayed fault ID: 012.
Common causes
Damp or wet environment causing transient leakage (common on rainy days)Damaged AC cable insulationDamaged DC cable insulationGround fault in PV array
What to check
STEP 1
If raining or recently rained, wait for dry conditions and monitor. Check weather before further investigation.
STEP 2
In dry conditions: inspect AC and DC cables for damaged insulation, cuts, or pinch points. Check cable glands for moisture ingress.
Escalate if
Cabling confirmed intact in dry conditions but fault persists — contact Sungrow support
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