Breaker Tripping When Charging

[eisenb11]

I’ll differ to you on this. Mine is not an AFCI Breaker

I don't get what you're saying. Are you saying that you're not on an AFCI breaker and are NOT having problems? Or you are on a non-AFCI breaker and you ARE having problems?

If you are on a non-AFCI breaker and you ARE having problems, then I stand by what I've said that something seems to be wrong as you shouldn't be popping that 50A breaker.

- Edit - Found your earlier post:

" I’ve had the same issue with both a juice box and Enel - turned down max charge from 40 to 38 and problem went away"

That shouldn't be required - makes me think something is either wrong with the charger or with the breaker if a small 2A change fixes the problem, no?

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[RPSRPS]

I don't get what you're saying. Are you saying that you're not on an AFCI breaker and are NOT having problems? Or you are on a non-AFCI breaker and you ARE having problems?

If you are on a non-AFCI breaker and you ARE having problems, then I stand by what I've said that something seems to be wrong as you shouldn't be popping that 50A breaker.

I’m not having the issue, I was relaying my experience to the gentleman who was. My problem was reconciled by lowering the charging amperage to 38 from 40. I had just mentioned to him that I thought my issue might have also had something to do with the draw from when my AC came on.

 

[eisenb11]

I’m not having the issue, I was relaying my experience to the gentleman who was. My problem was reconciled by lowering the charging amperage to 38 from 40. I had just mentioned to him that I thought my issue might have also had something to do with the draw from when my AC came on.

Yeah, I found your earlier post after I posted that. I'm thinking that what you're doing is more of a workaround, though, as perhaps addressing the root cause of the issue.

In general, that breaker shouldn't be popping under normal conditions (which does include a car charging starting up or an A/C in your case). I'm more inclined to place the blame on faulty equipment - either the breaker or the device consuming the electricity is malfunctioning and drawing more than it should or some other issue.

 

[NetArchitect]

Just to give an update.. Emporia replaced my evse and I was able to use it fine with my Taycan. However when I try to charged it using my ID.4 thats when the breaker trip again. So it doesn’t seem like a Taycan issu anymore. Right now I just don't charge my id.4 anymore at home. I will probably have someone build another breaker for ithe id.4? I did send it to the dealer and it charged correctly with their L2 evse

 

[Tooney]

Just to give an update.. Emporia replaced my evse and I was able to use it fine with my Taycan. However when I try to charged it using my ID.4 thats when the breaker trip again. So it doesn’t seem like a Taycan issu anymore. Right now I just don't charge my id.4 anymore at home. I will probably have someone build another breaker for ithe id.4? I did send it to the dealer and it charged correctly with their L2 evse

If breaker trips when ID.4 charges, there is something wrong with ID.4 - probably its on-board charging system. Need to have its on-board charging system checked. Just because it charged correctly at dealer does not mean it is working properly.
Try charging the ID.4 at a public AC charger.

 

[David Bennett]

I’ve had the same issue with both a juice box and Enel - turned down max charge from 40 to 38 and problem went away. I also had issue during A/C season, the spike in draw when A/C came on would trip my breaker

Do you know what class of breaker you have? Your A/C compressor might have a high inrush current and require a class 30 to prevent nuisance tripping.

 

[BayouTiger]

So I did some digging - are you sure you have a NEMA 15-40??? I’m thinking that you have a NEMA 14-50.

If you have a 14-50 on a 50A breaker (like I do) then 40A charging is technically correct.

Note: one other poster suggested 38A.

A 40A charger would go on a 50A circuit with the 14-50R receptacle due to the 80% rule for circuit loading. A 40A circuit would limit you to 32A@240 (7.68kw). At least for the US.

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