Tesla Powerwall › low-voltage communication harness
Powerwall capacity halves, one unit stops responding
reported more than once
Symptoms
- One of two Powerwalls stops charging/discharging so the system rate halves (11.5 kW to 5 kW) or both go offline at 0% for weeks
- Gateway 3 shows solar and charging but no home/grid data and the TEDI WiFi broadcasts intermittently
- Reboots help only for hours
Alerts and codes
LED flashing (Powerwall 2)Backup Switch LED flashing
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.