Earth/ground fault detected. System has isolated for safety. Meets IEC 62109 earth fault requirements.
Common causes
Damaged or incorrectly terminated earthing conductorPV string insulation failure (moisture in junction box or damaged cable)Internal battery module faultEarth rod or MET connection missing or loose
What to check
STEP 1
Power down — BAT switch OFF, grid breaker OFF
STEP 2
Measure insulation resistance of PV strings to earth — must be >1 MΩ
Escalate if
Fault clears but returns after reset, or insulation resistance <1 MΩ — contact Anker UK support +44 (0) 1616 056 301
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