What it means
Ground Fault protection — Listed under 7.1 Battery System Features as part of the inverter-interface protection set: detects/protects against ground faults at the battery-inverter interface.
Cause: Leakage current to ground was detected at the battery-inverter interface — damaged cable insulation or a wiring fault allowing current to flow to earth.
How to fix it
- Power down the inverter, wait 5 minutes for capacitors to discharge, then restart.
- If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.
Source: felicity-5.1-kwh-user-manual.pdf, p.4