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If you are on a 240V/50A circuit, you should be getting 29 miles per hour charging rate. View attachment 193308
The car dropped amps from 40 to 30 as a safety measure when it sensed a problem with the circuit. You should be able to charge at 40A if it's wired properly. Get it checked before you try to use it again.Crap! The power to the outlet just went out. Could this happen because I changed the setting to 40 amp?
Yes, it was.Just called customer service, and they had me change the settings in the car from 30 amp to 40 amp, and I'm now getting 26 mph. I guess the 30 amp was limiting the speed of my charge.
Higher amperage, higher charge rate. The car analyzes the circuit it is connected to and makes a determination about what is a safe amperage to charge at. It does not automatically charge at what you think is the maximum amperage the circuit can handle.Does anyone know what is the benefit of charging at 30 amp versus changing the setting to 40 amp? Why not default at the faster charging rate at 40 amp?
You likely have a problem with the circuit you are plugged into. You need to have a qualified electrician check it out ASAP.Crap! The power to the outlet just went out. Could this happen because I changed the setting to 40 amp?
Yes, it was.
Higher amperage, higher charge rate. The car analyzes the circuit it is connected to and makes a determination about what is a safe amperage to charge at. It does not automatically charge at what you think is the maximum amperage the circuit can handle.
You likely have a problem with the circuit you are plugged into. You need to have a qualified electrician check it out ASAP.
What is the amperage of the circuit breaker of the circuit you are trying to charge from?
I am currently battling this issue. My 100amp service that runs to the house coupled with my 40+ year old box has forced me to limit my charging to 30A. I have wiring for 50, my breaker is 50, and i should be good... but without a box upgrade, I'm stuck for now.
demundus, can you explain why this is an issue? I'm curious. I'm imagining that you have wiring to support 100A coming into your old load center, wiring to support 50A, and a new 50A breaker, then I don't see why the age of the load center matters?I am currently battling this issue. My 100amp service that runs to the house coupled with my 40+ year old box has forced me to limit my charging to 30A. I have wiring for 50, my breaker is 50, and i should be good... but without a box upgrade, I'm stuck for now.
While prepping for my Model 3, there is no point to putting in a 80 amp circuit if I do not plan to get dual charging? Tesla does not currently offer faster charging at home than 29 miles per hour on a single charger? Thanks for your help.
demundus, can you explain why this is an issue? I'm curious. I'm imagining that you have wiring to support 100A coming into your old load center, wiring to support 50A, and a new 50A breaker, then I don't see why the age of the load center matters?
Whoa!!! Something is seriously wrong. I wouldn't use a circuit that acted like that if you paid me. Get someone who knows what they're doing out there to check it out. What brand is the panel?Long long long story short: My car started charging at a lower rate, then eventually stopped charging. My breaker was melted (slow burn) over the course of a year. I replaced the breaker and tried to charge at a full 40A and got smoke from the breaker. Dialed it down to about 30 and havent had an issue, but still uncomfortable with the idea. I had the electrician who did the work come out to inspect, he cleaned the busbar and load test the line. The breaker is getting pretty hot @ 40a on the bar side (not wire side). He wasn't really sure why, the line run is over engineered, as is the breaker. The panel is old, and while there isnt much load on the house (gas everything) he suggested to get a new box with upgraded service.
A few other opinions yielded a similar result. Some have indicated I should have used #6 copper instead of #8, but hindsight is 20/20 and he was within code and spec to use #8, so I can't rest on that as a fault.