DC Overvoltage (Alarm 1020)

PV input voltage above the inverter maximum. Variants OV-DC01 and OV-DC02 per MPPT on ES models.

Common causes

Too many panels in seriesCold weather raising Voc

What to check

STEP 1

Check string Voc against the inverter maximum input and count panels in series.

STEP 2

Restart the inverter.

Escalate if

Voc within range but alarm persists

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