How do I fix DC Reversed (Alarm 1028) on a Solis?

Isolate the system, then verify string polarity with a meter before reconnecting. Then: Check the cable size is correct and the grid standard is set.

Solis

Reve-DC

DC Reversed (Alarm 1028)

A PV string is connected with reversed polarity. Isolate before checking.

Common causes

String polarity reversed at the inverter or in a junction boxWrong cable size

What to check

STEP 1

Isolate the system, then verify string polarity with a meter before reconnecting.

STEP 2

Check the cable size is correct and the grid standard is set.

Escalate if

Polarity confirmed correct but alarm persists

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