Enphase
Circuit Breaker Nuisance Trip or Short Circuit
Charger trips the house breaker immediately or shortly after starting a charge.
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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
Shorted power module inside charger, Short in supply wiring or junction box, Undersized or aged breaker, Ground fault not detected by charger but seen by upstream GFCI breaker
How to Fix / Troubleshooting
Shock and fire hazard: Repeated breaker tripping indicates a serious issue. Do not keep resetting.
- Stop resetting: If the breaker trips more than once, leave it OFF until the cause is found.
- Visual inspection: Look for burn marks or damage on the charger housing, conduit, and panel around the breaker.
- Check for other loads: Ensure the charger is on a dedicated circuit with no other loads connected.
- Electrician diagnostics: Have an electrician megger-test the wiring, inspect junction boxes, and test the charger input for shorts.
- Service: If wiring is sound, the Enphase power module or internal wiring is likely shorted and must be replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
Enphase EV Charger Power Module or Internal Line Wiring
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