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.