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

Tesla Wall Connector on 50 amp breaker

May 13, 2018
18
14
Sacramento
I have a new Model 3. I would like to install the Tesla Wall Connector. I have an available 50 amp breaker. If I install the Wall Connector to the 50 amp breaker, the car will draw 40 amps and I should add 37 miles per hour to my battery. Is this correct? I know I could up the breaker to 60 amps, but with my panel this adds a number of issues.

Am I correct on the 50 amp breaker adding 37 miles? Here is where I found the charging information.

Home Charging Installation
 

KJD

Supporting Member
Dec 14, 2013
1,351
1,009
SLC, UT
Yes I think that is correct based on this chart. You just need to set the rotary switch in the Wall Connector to the proper setting and that is in the instructions. Easy to do.

Screen Shot 2018-05-13 at 5.57.19 PM.png
 
  • Informative
Reactions: scrapps

TallGuy3

Member
May 29, 2016
21
16
Seattle
Do you have NEMA 14-50, 240 on that 50amp breaker now? $500 plus install of ~$700 for wall connector didn’t make sense to me. Only increases output from 32 amps with NEMA 14-50 to 40 amps with wall connector. Plus 30 miles per hour versus 37 miles per hour for wall charger is nominal unless you discharge battery fully and need to recharge 100% in less than 10 hours overnight. Sure, going to 60 amp breaker and 48 amp output sounds great, but how much will that cost you?

Unless you have 2 Teslas of course. In which case the wall charger can balance the charge loads, and then 100amp breaker makes the most sense.
 
  • Like
Reactions: karpetkutter

brkaus

Well-Known Member
Jul 8, 2014
7,909
6,402
Austin, TX
You are correct.

I put my wall connector in a 50a breaker and it provides plenty of charging for me (Model S) overnight.

You would likely be fine with the UMC and a 14-50 as well.
 

miimura

Well-Known Member
Aug 21, 2013
6,362
6,065
Los Altos, CA
You are correct.

I put my wall connector in a 50a breaker and it provides plenty of charging for me (Model S) overnight.

You would likely be fine with the UMC and a 14-50 as well.

Just remember that the Gen2 UMC provided these days is only 32 amps on a 14-50 while the Gen1 UMC delivers 40 amps to the car. Likely still "fine" for most people, but it is not the same as a Wall Connector on a 50 amp breaker.
 
  • Informative
Reactions: Rocky_H

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