E07
Porsche
Supply Voltage Out of Range / Phase Configuration Error
Porsche EV home charger shows E07 and refuses to start; often associated with incorrect supply voltage or wiring.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Incorrect line-to-line or line-to-neutral voltage at wallbox input, Miswired phases or neutral in supply cable, Supply frequency outside allowed range, Faulty input voltage sensing circuit on main control PCB
How to Fix / Troubleshooting
Safety first: Only a qualified electrician should measure or modify supply wiring. Turn off the main breaker before opening any covers.
- Verify supply configuration: Confirm that the Porsche wallbox is wired according to the installation manual (single-phase or three-phase as specified). Incorrect phase/neutral connections can trigger E07.
- Measure voltage and frequency: The electrician should measure line-to-line and line-to-neutral voltages at the wallbox input terminals and verify they are within Porsche’s specified range and that frequency is stable (typically 50/60 Hz).
- Check neutral and phase rotation: On three-phase installations, verify correct phase rotation and that neutral (if required) is properly connected.
- Inspect input terminals: Tighten all input terminal screws to the torque specified by Porsche to ensure reliable sensing.
- Replace sensing circuit if needed: If supply is correct but E07 persists, the input voltage sensing circuit on the main control PCB may be defective and the board should be replaced.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Input voltage sensing circuit on main control PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements