How do I fix Ground / Earth Fault on a FoxESS?

Check the PE (earth) terminal is secure at the inverter AC output. Confirm AC isolator earth is connected Then: Test earth continuity from inverter PE terminal back to consumer unit earth bar

FoxESS

Ground Fault

Ground / Earth Fault

Earth fault current detected. Inverter shuts down for safety.

Common causes

PE conductor not connected at inverter or AC isolatorFaulty earth connection at consumer unitDamaged AC cable

What to check

STEP 1

Check the PE (earth) terminal is secure at the inverter AC output. Confirm AC isolator earth is connected

STEP 2

Test earth continuity from inverter PE terminal back to consumer unit earth bar

Escalate if

Earth continuity confirmed and fault persists — escalate

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More FoxESS fault codes

Grid Lost

Error 26

Grid Voltage Out of Range

Error 27

Grid Frequency Out of Range

Error 28

10-Minute Average Voltage Fault

Over Load

Inverter Overload