Reverse current has occurred in PV array

What does 7901 mean?

Reverse current has been detected in the PV array. This condition can damage the PV modules or the inverter. The inverter will shut down for 1 minute and reset automatically on day change.

• Faulty PV modules.
• Shading or mismatch conditions causing reverse bias in certain modules.
• Wiring errors.

Click steps to track your progress.

1. 1

   Identify and isolate the affected PV string or modules.

2. 2

   Check for any shading issues on the PV array.

3. 3

   Contact the SMA Service Line for further diagnosis.