How do I fix PE Abnormal / Earth Fault on a Growatt?

Test earth continuity from inverter PE terminal to consumer unit earth bar. Must be <1 Ω Then: Check AC cable for damage. Ensure PE terminal is clamped correctly at both ends

Growatt

Error 303

PE Abnormal / Earth Fault

Earth continuity test has failed or PE conductor is absent.

Common causes

PE conductor not connected at inverter or isolatorPoor earth connection at consumer unitDamaged AC cable with broken earth

What to check

STEP 1

Test earth continuity from inverter PE terminal to consumer unit earth bar. Must be <1 Ω

STEP 2

Check AC cable for damage. Ensure PE terminal is clamped correctly at both ends

Escalate if

Earth continuity confirmed and fault persists — escalate

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More Growatt fault codes

Error 200

AFCI — Arc Fault Detected

PV Isolation Low (RISO)

Error 300

AC Voltage Out of Range