Porsche
External Overcurrent or Earth Leakage Trip
Porsche EV home charger causes the house breaker or RCD to trip as soon as charging starts.
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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.
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Possible Causes
Circuit breaker rating too low for configured wallbox current, Shared circuit with other heavy loads, Earth leakage from wallbox output cable or internal components, Incorrect wiring of neutral and earth in supply circuit
How to Fix / Troubleshooting
Safety first: Repeated tripping indicates a serious issue. Do not keep resetting the breaker. Turn off the charger and contact an electrician.
- Check circuit rating: Confirm that the breaker feeding the Porsche wallbox matches the maximum current setting of the charger. If the charger is set higher, have an electrician reduce the setting or upgrade the circuit as per code.
- Dedicated circuit: Ensure the wallbox is on a dedicated circuit with no other large loads connected.
- Visual inspection: Inspect the cable and wallbox for visible damage or signs of moisture. Do not use the charger if damage is found.
- Technician testing: An electrician should perform earth leakage and insulation resistance tests, verify correct wiring of line, neutral, and earth, and correct any installation errors.
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Repair Difficulty
Hard
4/5
Required Part
Supply circuit breaker and wallbox output cable
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