Charging at home decreased to 46Amps

[Genie]

Electrical terminology can be very confusing. I don't know how to correctly say what you're trying to say, but I do know this is wrong for two reasons:
1) In the US, my 240V circuit using 2 legs (slots) in the panel is still single-phase (I used to think it was two phase, but that was wrong).
2) I can charge at 72 amps on the circuit described in (1), so the boards are not tied to (for) phases or legs.

I think Tesla connects the 3 boards as single phase for North America and as 3 phase for some cars sold in other markets,

 

[rejedejo]

My 2018 Model 3 negotiates with the charger for a minute or so then sets the charge rate it is comfortable with. Not the 48A my new charger can supply, but only 32A. Sends an error message saying something about the quality of the connection. 32/48 Amp. I wonder what that negotiation is all about.

 

[thtrotter]

So… I’m sorry that I never closed this loop. The service center replaced the “on-board” charger and all is well — charges at 64/64Amps about 40mph.

 

[thtrotter]

 

[John in LB]

As soon as you handed them $2900... everything gets straightened out !!! see.... very easy... 😁

By the way, I had the same problem, but my 2017 was still under warranty when it failed...

 

[thtrotter]

Don’t rub it in… if it weren’t for that and a complete set of tires at $1500 every 9 months, it’d be perfect…

 

[strider]

My 2018 Model 3 negotiates with the charger for a minute or so then sets the charge rate it is comfortable with. Not the 48A my new charger can supply, but only 32A. Sends an error message saying something about the quality of the connection. 32/48 Amp. I wonder what that negotiation is all about.

What voltage is it showing before and after the drop? If the voltage sags below a certain value it will lower the charge rate. It's possible that some part of your electrical chain can't handle 48A sustained with other loads. If it starts at, say, 243V/48A and then slowly drops to 235V it may kick down to 32A to try and get the voltage back up.

 

[Riceball777]

I thought the max charge rate was 48 amps?

 

[thtrotter]

I thought the max charge rate was 48 amps?

It’s 72Å… with my charger connected to two 80Å breakers, I get 64Å…