Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

Using Existing Nema 14-50 Power Outlet to charge Model 3 Performance

BogStandard

Member
Jun 2, 2021
34
46
MN
I used the UMC at first, but charging at 32amps got the cord pretty warm after a fairly short time. It never got hot, but any appreciable warmth is just wasted electricity. The battery/onboard charger cooling circuit would also activate fairly often. Lowering the amperage to 22 was the point where the cord stayed near ambient and the car's cooling fan rarely comes on. Even with my 120mi daily commute, 22A is plenty of speed to recharge every night.

I have now switched to a Grizzl-e EVSE, but I still only charge at 22A instead of 40A. Much less voltage sag and cooler running operation. I'm on a pretty old electrical grid in an 1800's founded small town in the middle of nowhere, so I feel safer not stressing it. Everything in this town is dated, the water system was (until last fall) still using the original cast iron water pipes from the early 1900's that were corroding away and always leaking. I think they replaced the original sewer lines too in that project.
 
  • Like
Reactions: Rocky_H

CoastieM3

Helicopter Pilot / M3 Driver
Jul 24, 2021
180
146
SF
Thank you for the heads up on this. I'll have to investigate my need for CHAdeMO adapter. Has anyone else found a need for it?
No. Between 14-50 at my house and superchargers I do not see the point. I live in SF/California so supercharges are everywhere.

At home 14-50 has been great.
 

Products we're discussing on TMC...

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top