I'm at wits end. My 2020 MY charges at 32amps and when done later in the evening shows 5amps charge available. 5amps is NOT permitted under the J1772 standard, so this throws up a red flag to me.
Here are some details....
0) if we program the car to charge as soon as it is plugged in, it will charge at the HPWC's advertised rate until full and stop. When it stops it will show 5amps.
1) we have MS, MY and M3... none of the other cars show 5amps when they finish charging. A neighbor has a 2021 MY and his does not show 5amp when charging is complete.
2) we have three gen 2 HPWC units in the car ports which used to be networked sharing a 48amp connection. One of my first troubleshooting steps was to separate these chargers from each other. We have charged the MY from all three of these HPWC's always with the same result.
3) I have a 14-50 in the workshop which is fed separate from the car port. Same result. all cars work correctly except for the MY.
4) We contacted Tesla and they sent a tech out 3 times. 2nd trip he replaced the charge port, 3rd trip he replaced the charge ECU.
5) We took the car to the Matthews NC service center and left it with them two days. They said they had installed a log in the car before we brought it to them (good, awesome troubleshooting tool) and that we had dirty power. They charged the car at the service center and never saw the issue.
6) We brought the car home and on the first charge, it flipped to 5amps when done.
7) we took the car to a neighbor's house and charged it... we did NOT see the problem two nights in a row.
Tesla would not tell me what voltages or how they determined we had dirty power.... so I'm just guessing here...
So... we must have dirty power. But what? I do have solar inverters and none of them are complaining about voltage or power factor errors. I guess I'll have the power company pull the meter so I can check all the lugs on that 4/0 service entrance and the ground. Any other ideas?
The thing that stumps me is why doesn't it happen to my M3 or the neighbor's MY?
Here are some details....
0) if we program the car to charge as soon as it is plugged in, it will charge at the HPWC's advertised rate until full and stop. When it stops it will show 5amps.
1) we have MS, MY and M3... none of the other cars show 5amps when they finish charging. A neighbor has a 2021 MY and his does not show 5amp when charging is complete.
2) we have three gen 2 HPWC units in the car ports which used to be networked sharing a 48amp connection. One of my first troubleshooting steps was to separate these chargers from each other. We have charged the MY from all three of these HPWC's always with the same result.
3) I have a 14-50 in the workshop which is fed separate from the car port. Same result. all cars work correctly except for the MY.
4) We contacted Tesla and they sent a tech out 3 times. 2nd trip he replaced the charge port, 3rd trip he replaced the charge ECU.
5) We took the car to the Matthews NC service center and left it with them two days. They said they had installed a log in the car before we brought it to them (good, awesome troubleshooting tool) and that we had dirty power. They charged the car at the service center and never saw the issue.
6) We brought the car home and on the first charge, it flipped to 5amps when done.
7) we took the car to a neighbor's house and charged it... we did NOT see the problem two nights in a row.
Tesla would not tell me what voltages or how they determined we had dirty power.... so I'm just guessing here...
So... we must have dirty power. But what? I do have solar inverters and none of them are complaining about voltage or power factor errors. I guess I'll have the power company pull the meter so I can check all the lugs on that 4/0 service entrance and the ground. Any other ideas?
The thing that stumps me is why doesn't it happen to my M3 or the neighbor's MY?