Tesla Powerwall › PV strings and MCIs
PV string production far below expected estimate
reported more than once
Symptoms
- New or reworked install produces roughly half the expected output
- String voltage/current readings show one MPPT channel idle or a string at a fraction of its voltage
- Problem dates from panel removal/reinstall or an installer reconfiguration
Alerts and codes
reverse polarity
The cause and the fix
Subscribers see the cause, the fixes that worked and who did them, part numbers and recent prices when a part is involved, and the field reports behind this entry.