Juicebox Pro40 repair

[Newomij]

My charger started flipping the 50 amp circuit breaker a few weeks ago.
I checked the ground for the electric panel and found it corroded, cleaned it up, and the issue went away for four weeks.
Issue is back. Cleaned the ground even better this time but did not help.
Does anyone know of an EV charger repair service?

 

[electriceddy]

My charger started flipping the 50 amp circuit breaker a few weeks ago.
I checked the ground for the electric panel and found it corroded, cleaned it up, and the issue went away for four weeks.
Issue is back. Cleaned the ground even better this time but did not help.
Does anyone know of an EV charger repair service?

Suggest you measure the current draw @ full load with a clamp on meter, if it is at 80% (40A or less and the breaker trips after running for some period), I would suspect the breaker overloads are overheating -replace it. Can't hurt to check the terminal voltages while you are there.
Cleaning/tightening the ground connection is always a good idea (not only for bonding purposes but also to avoid control issues) however if there were a short to ground with a solid bonding connection it would trip the breaker instantly.

 

[Newomij]

So, I got inside of the charger looking for continuity issues - found none. I disconnected all hot wires from the control unit and found no scarring. Resecured all wires. Plugged it back into the 240 outlet and charger worked again normally. After 15 minutes charging the car, the circuit popped again. Unplugged the charger - plugged it back in - reset the circuit breaker and charged the car for about an hour and thirty minutes when the breaker popped again.
electriceddy is the second person, now, to suggest it's not the charger but the circuit breaker itself.
I had a second 50 amp breaker sitting in the panel, swapped it with the first, but the same thing happened again.
I don't have the above suggested tool to measure the current draw. Time to call in an electrician.
Thank you, electriceddy, for your response.

 

[Frank Pierson`]

Suggest you measure the current draw @ full load with a clamp on meter, if it is at 80% (40A or less and the breaker trips after running for some period), I would suspect the breaker overloads are overheating -replace it. Can't hurt to check the terminal voltages while you are there.
Cleaning/tightening the ground connection is always a good idea (not only for bonding purposes but also to avoid control issues) however if there were a short to ground with a solid bonding connection it would trip the breaker instantly.

Like to expand on this a bit. Check your wire size in the panel and that the breaker terminals are tight, and not showing any signs of heat in the wires. I've run across several that have excess resistance and trip the breaker. Especially if it has aluminium wire.