String Current Backfeed

What does String Current Backfeed mean?

The DC SWITCH has automatically turned off, signaling an event where current is flowing back into the PV strings from the inverter or another source. This condition can indicate an internal fault within the inverter or an external wiring issue that could damage the PV array or the SUN2000 inverter.

• Internal fault within the inverter allowing current to backfeed into PV strings.
• External electrical fault or short circuit on the DC side causing reverse current flow.

Click steps to track your progress.

1. 1

   Identify and rectify the cause of current backfeed into the PV strings.

2. 2

   After rectification, wait for at least 3 minutes.

3. 3

   Set the DC SWITCH handle to OFF to complete the reset procedure.

4. 4

   Set the DC SWITCH handle to ON to restart the inverter.