Sungrow
SG-003 · ID 8
Grid Overfrequency
AC grid frequency has exceeded upper frequency protection threshold. Auto-reconnects when frequency normalises. Displayed fault ID: 008.
Common causes
Grid frequency genuinely above thresholdFrequency protection parameters set too low
What to check
STEP 1
Wait — inverter auto-reconnects. If recurring, measure actual grid frequency and compare to threshold.
STEP 2
If frequency exceeds set range, contact DNO/DNSP. Review frequency protection parameters via App or LCD.
Escalate if
Fault persists after parameter review — contact Sungrow support
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