Symptoms
- Breaker trips shortly after charging starts
- Trips more often when other appliances run at the same time
- Charger shows an error after the trip
- Breaker feels warm to the touch
Likely causes
- CommonCharger set to an amperage higher than the circuit supportsMany chargers let you adjust the charging current, and setting it too high for the circuit will trip the breaker.
- CommonShared circuit with other high-draw appliancesRunning the charger at the same time as an AC unit, dryer, or oven on a shared circuit can overload it.
- PossibleUndersized or aging breaker or wiringA breaker or circuit that isn't properly rated for continuous EV charging load can trip repeatedly or overheat.
- PossibleFault within the charger itselfAn internal charger fault can cause it to draw excess current and trip the breaker.
What to do
- Check the charger's settings and reduce the amperage if it's currently set higher than the dedicated circuit's rating.
- Avoid running other major appliances on the same circuit while charging.
- Note whether the breaker feels warm or shows any discoloration, which would be a sign to stop using it immediately.
- Do not repeatedly reset a breaker that keeps tripping; treat two or more trips as a sign to stop and get it inspected.
- Check that the circuit was originally installed and rated specifically for EV charging load, since older outlets weren't always designed for it.
- Contact the charger manufacturer if the charger itself seems to be drawing more current than its setting indicates.
When to call a pro
A licensed electrician should inspect the circuit, breaker, and wiring; if the charger itself is faulty, the manufacturer should evaluate it under warranty.
Safety
Use caution
A breaker that trips repeatedly or feels warm indicates a possible electrical fault; stop using that circuit and have a licensed electrician inspect it before continuing.