Solis
E021
Battery Over-Voltage
Battery pack voltage has exceeded safe upper limit.
Common causes
BMS fault on batteryIncorrect charge voltage set in inverterBattery fault
What to check
STEP 1
Check inverter battery charge voltage setting matches battery specification. Dyness Powerbox G2: max charge 58.4V. Fogstar Drift 16kWh: max charge 58.4V
STEP 2
Power cycle battery (BMS breaker OFF 30 seconds, then ON). Check for BMS fault lights on battery
Escalate if
Charge voltage correct and fault persists — internal BMS fault, contact battery manufacturer
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