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Home charging
- Thread starter Penn
- Start date
Gadget-X
Member
I never installed one but when I was considering what to buy for my new MSP I did some research....
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Ostrichsak
Well-Known Member
While charging, check the main screen in your car and see what the amperage is set at. If that outlet was installed properly you should be able to set that at 40 amps. This amperage on 240-volts should yield somewhere around 30mph charge rate in our cars. It could also be that it wasn't installed properly and the car has sensed an issue and is protecting itself, your home and ultimately you. Those are the two options so I would proceed forward with that knowledge whatever way you best see fit based on the data you receive.
ATPMSD
Active Member
If you are using the Gen 2 Mobile Connector it is limited to a maximum draw of 32 amps, you will not see 40 amps. At 32 amps you should see “about” 23 miles per hour.
Yup, got all that. Voltmeter reading 240 on end of 15 ft extension cable, as well as the adapter to the Tesla charger
ATPMSD
Active Member
ATPMSD
Active Member
Hard to tell from the picture, is the cable coming out of the top of the mobile connector removable? If so, please post of picture of the prongs on it.
ATPMSD
Active Member
ATPMSD
Active Member
OK, best guess then there is a problem with the extension cord, so I would try plugging directly into the wall outlet. After that I am out of suggestions.
beatle
Active Member
My guess is that your voltage is dropping at some point and the charger will then cut the amps. I did this on a 14-50 installed in my father's garage using a first gen UMC. It started at 40A 230V and then slowly dropped to 223V. At that point the charger dropped to 30A and continued to charge, bringing the voltage back up over 230V.
Unplug the UMC and then plug it back in. Then connect to the car and check the amps. If it reads 32A, continue to monitor and see if it drops to 24A. In my experience it took about 20 minutes before the charger gave up on the voltage droop and lowered the amps, but that may vary depending on the voltage drop.
I have also charged on an extension cord (12awg to 6-20 receptacle) and had no issues or droop, so extension cords aren't inherently evil.
Unplug the UMC and then plug it back in. Then connect to the car and check the amps. If it reads 32A, continue to monitor and see if it drops to 24A. In my experience it took about 20 minutes before the charger gave up on the voltage droop and lowered the amps, but that may vary depending on the voltage drop.
I have also charged on an extension cord (12awg to 6-20 receptacle) and had no issues or droop, so extension cords aren't inherently evil.
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