String Current Backfeed

What does 2012 mean?

A PV string has a lower end voltage compared to other strings, often due to an insufficient number of series-connected modules or shading. This can lead to current flowing back into the string, reducing overall system efficiency.

• Only a few PV modules are connected in series in the PV string, causing the end voltage to be lower than other PV strings.
• The PV string is shaded.
• The open-circuit voltage of the PV string is not normal.

Click steps to track your progress.

1. 1

   Check whether the PV modules connected in series in the PV string are enough. If not, add more modules.

2. 2

   Check whether the PV string is shaded.

3. 3

   Check whether the open-circuit voltage of the PV string is normal.