[Csaether]

The car had been sitting in the sun, so maybe 90 F or so. I have a level 2 Juicebox charger, 32 amp limit, on a 50 amp GFI circuit breaker.

Plugged it in to charge and it would just start to charge, then the circuit breaker would trip. This happened multiple times.

Put the car in the shade, air temp probably around 80 F for an hour. Car then charged normally without tripping the breaker.

It seems unlikely it drew more than 50 amps. Could the heat have caused a ground fault to trip it?

 

[obsoperator]

I don't know if the Juicebox has a GFCI of its own, but two GFCI's cascaded can produce nuisance-trips like this. I don't own any GFCI breakers in my panel, but can you distinguish between a GFCI trip and an overcurrent trip? Just asking out of ignorance. Because I always have plenty of time to charge, I set my (adjustable) EVSE to 24 Amps. Do you have that option?

 

[Dark-Fx]

I don't know if the Juicebox has a GFCI of its own, but two GFCI's cascaded can produce nuisance-trips like this. I don't own any GFCI breakers in my panel, but can you distinguish between a GFCI trip and an overcurrent trip? Just asking out of ignorance. Because I always have plenty of time to charge, I set my (adjustable) EVSE to 24 Amps. Do you have that option?

All EVSEs are required to have a GFCI contactor inside. It's part of the reason they are so expensive.

 

[Csaether]

All EVSEs are required to have a GFCI contactor inside. It's part of the reason they are so expensive.

In my case it was definitely the circuit breaker GFI that tripped. Once the car was out of the sun and cooled down it charged fine.

 

[efbolt]

I plug my Bolt into a regular GFCI protected outlet in my garage. Roughly 3 or so times per summer, it will trip. I figured the heat must play some role because it doesn't happen in the winter.

 

[Csaether]

I plug my Bolt into a regular GFCI protected outlet in my garage. Roughly 3 or so times per summer, it will trip. I figured the heat must play some role because it doesn't happen in the winter.

Thanks. At least I'm not the only one to experience this. I will ask my dealer about it.

 

[CharleyTX]

did the OP ever figured out what was it?
my car is now doing kind of the same thing. it is 100- 105F hot in austin TX now.

 

[XJ12]

my car is now doing kind of the same thing. it is 100- 105F hot in austin TX now.

tripping a GFCI breaker? or is the EVSE shutting down?

 

[EV Trek 37604]

Heat will lower the tripping point of breakers, they are designed that the current makes heat in the breaker and at a particular temperature it trips, the higher the ambient temperature, usually over 100°f, the lower the current needed to trip the breaker, also as a breaker ages the rating can also be affected, especially the more it has tripped.

 

[CharleyTX]

tripping a GFCI breaker? or is the EVSE shutting down?

It's popping or tripping the breaker at the main (200amp) panel. It is not a fancy GFCI breaker, just the good ol GE-type regular breaker.

 

[austynjfarr]

I am experiencing the same here in Fort Worth, TX. My garage temp can sometimes reach 102 unfortunately. I am noticing the indicator lights on the stock Chevy L2 Charger blue and orange, indicating an overheating issue. Not sure how to help it or stop it from happening.