ChargePoint
Short Circuit or Overload on Supply Circuit
Breaker trips immediately or shortly after starting a charge; sometimes accompanied by a pop or smell near panel.
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
Shorted EVSE input wiring, Incorrect breaker size or type, Internal short on power board, Damaged input surge protection device (SPD)
How to Fix / Troubleshooting
Warning: Repeatedly resetting a tripping breaker without finding the cause is dangerous.
- Step 1 – Visual inspection:
- Check the charger exterior and surrounding wiring for burn marks or melted insulation.
- Step 2 – Isolate charger:
- Turn OFF the breaker and disconnect the charger (unplug or disconnect hardwired leads).
- Turn the breaker back ON with the charger disconnected.
- If it still trips, the issue is in the house wiring or panel; call an electrician.
- Step 3 – Test charger separately (qualified):
- With the charger disconnected and power OFF, measure resistance between line conductors and ground at the charger input.
- Very low resistance indicates an internal short; do not re-energize.
- Step 4 – Internal inspection:
- Open the charger and inspect the power board, surge protection device, and wiring for obvious damage.
- Replace any visibly damaged components.
- Step 5 – Professional repair:
- Due to the risk of fire and shock, internal shorts should be repaired by an EVSE technician, often by replacing the power board or entire unit.
Advertisements
Repair Difficulty
Professional Required
5/5
Advertisements