Charging my Y with a NEMA 14-50

[eladts]

Not to hijack this thread, but does level 2 charging at 32-40amps reduce battery life, or result in Tesla reducing charge strength, like SuperCharging does?

Every use of the battery reduces its life, but L2 charging is the next best thing after just not using your car at all.

 

[rxlawdude]

Not to hijack this thread, but does level 2 charging at 32-40amps reduce battery life, or result in Tesla reducing charge strength, like SuperCharging does?

No.

 

[BLH17]

I agree there is no value added with the in home $500. unit unless speed of charge is important. I have been using the mobile charger that came with the car and bought the 14-50 adapter plug. I down graded the charging amps to 25 which is more than fast enough to recharge for my use. The cord on the mobile charger gets very warm when running at 32 amps. I know the home unit has a heavier wire and would not get as warm running 32 amps. I wish the mobile unit came with a 14-50 adapter plug instead of NEMA 5-15. It would save $35.

There isn't going to be any detectable efficiency difference since none of these units are doing any energy conversions. They are EVSEs (Electric Vehicle Supply Equipment), which means that all they are doing is some safety detection and communication with the vehicle and then connecting a switch. It's just passing the alternating current circuit from your house down the wire into the car. It's the onboard charger inside the car that does the more complicated work of rectifying it from AC to DC and managing charging the battery.

There would be a difference but perhaps not noticeable - if the Wall Charger uses a different gauge copper in it versus the Mobile Charger. Checking the temperature of each cable may tell this. I am probably just going to splurge for the pretty Wall Charger anyway even though I am only gaining 8 amps or just under 2kV of faster charging ability. It is odd how the $275 mobile charger has a 20' cable and the long cable Wall Charger ($500) is only 18'. So it's really a side-grade. Not sure what the use of the WiFi will be on it (on the Tesla website it seems pretty useless).

 

[Ozzie66]

So, I plan to leave the MY in my garage plugged in to a nema 14-50 while away for app. 13 days.while away Is that the optimal way to do this?
2020 Model Y . Thanks.

 

[rxlawdude]

So, I plan to leave the MY in my garage plugged in to a nema 14-50 while away for app. 13 days.while away Is that the optimal way to do this?
2020 Model Y . Thanks.

Yes. Set to 80%. (90% okay, 80 better for this situation.)