80A Breaker installed

[Chef Brian]

So, I had an electrician install my wall charger. On my first charge I noticed I was only drawing 12A. Did my research and found that the guy didn’t “Set the operating current” correctly. Installation guide says for an 80A breaker (which will output 64A Max) to set the rotary to “B”. But, the online guide says that any breaker over 60A is going to charge the car at the same speed.

Should I just have the rotary adjusted to the 60A position? Since it’s seemingly useless to pull more amperage.

 

[FourOhFour]

Set the dial to match the circuit. The dial only adjusts the maximum the car is allowed to draw, setting it higher won't cause any additional draw.

 

[Big Earl]

If it's installed on an 80 amp breaker with the appropriate wiring, set the rotary dial to B. Your Model 3 can't charge faster than 48 amps, but some Model S and X can. Might as well make the full power available if you have it.

 

[Chef Brian]

Follow up question:

If the car can only take 48A and that equates to 44 miles gained an hour, than why is a supercharger able to charge 10x faster?

 

[Big Earl]

Follow up question:

If the car can only take 48A and that equates to 44 miles gained an hour, than why is a supercharger able to charge 10x faster?

Because the Supercharger feeds direct current (DC) directly into the battery. Charging on an AC outlet requires the car's internal charger (48 amps max) to rectify the AC current to DC current. A Supercharger machine has a stack of twelve chargers similar to what's in your car.

Since you're in Rockville, I'd like to invite you to our monthly EVADC meeting. Third Wednesday of every month. Hope to see you there! Electric Vehicle Association of Greater Washington, DC | Promoting electric vehicles as an environmental and energy alternative

 

[M3BlueGeorgia]

If it's installed on an 80 amp breaker with the appropriate wiring, set the rotary dial to B. Your Model 3 can't charge faster than 48 amps, but some Model S and X can. Might as well make the full power available if you have it.

Unless you have a S or X that can charge faster, there's currently no advantage to being at over 60A (80% = 48A continuous)

 

[Big Earl]

Unless you have a S or X that can charge faster, there's currently no advantage to being at over 60A (80% = 48A continuous)

Maybe he'll come across a friend or relative with an S or X in the future. I don't know. My point is, why not set it to the max that it's wired for rather than setting it at the max of the particular car he has? Having the extra power available hurts nothing.

 

[Chef Brian]

Since you're in Rockville, I'd like to invite you to our monthly EVADC meeting. Third Wednesday of every month. Hope to see you there! Electric Vehicle Association of Greater Washington, DC | Promoting electric vehicles as an environmental and energy alternative

That sounds awesome, I work a crazy schedule, but if the planets align and I’m free on a Wednesday I’ll be there!

 

[Chef Brian]

How difficult or dangerous is it for me to just cut off the breaker, open up the charger and adjust my dial myself? I mean do I really need to wait for my electrician to come out again to get this done?

 

[davewill]

How difficult or dangerous is it for me to just cut off the breaker, open up the charger and adjust my dial myself? I mean do I really need to wait for my electrician to come out again to get this done?

Not difficult at all. Go for it if you're comfortable with doing so. I open my EVSEs every now and again just to inspect and verify that there's no signs of excess heat being generated inside.

 

[ucmndd]

How difficult or dangerous is it for me to just cut off the breaker, open up the charger and adjust my dial myself? I mean do I really need to wait for my electrician to come out again to get this done?

It’s exceedingly simple and not dangerous at all provided you can operate the circuit breaker.

 

[Big Earl]

The most difficult part is removing the wall connector’s cover.

 

[john85775]

Maybe he'll come across a friend or relative with an S or X in the future. I don't know. My point is, why not set it to the max that it's wired for rather than setting it at the max of the particular car he has? Having the extra power available hurts nothing.

Your wall charger will likely last far longer than your car, so definitely thinking longer time frame and future needs rather than "what works best today."

 

[VT_EE]

Make sure you read the manual on how to open it. There are some unique star bits you will need that came with the unit. Hopefully your electrician didn’t take them.

 

[AlanSubie4Life]

Make sure you read the manual on how to open it. There are some unique star bits you will need that came with the unit. Hopefully your electrician didn’t take them.

Yep, he needs the T20 security pin Torx bit that came with the kit, or another equivalent bit from some other set.

 

[DanDeStefano]

So, I had an electrician install my wall charger. On my first charge I noticed I was only drawing 12A. Did my research and found that the guy didn’t “Set the operating current” correctly. Installation guide says for an 80A breaker (which will output 64A Max) to set the rotary to “B”. But, the online guide says that any breaker over 60A is going to charge the car at the same speed.

Should I just have the rotary adjusted to the 60A position? Since it’s seemingly useless to pull

Yep, he needs the T20 security pin Torx bit that came with the kit, or another equivalent bit from some other set.

Bow do you change the rotary to B. We just installed the wall charger and we are only getting 10 miles per hour. Thanks

 

[DanDeStefano]

How do you change the rotary to b. We are getting 12amps or 10 miles per hour and should be more.

 

[VT_EE]

How do you change the rotary to b. We are getting 12amps or 10 miles per hour and should be more.

Read the HPWC manual. There is a dial you set.

 

[Big Earl]

How do you change the rotary to b. We are getting 12amps or 10 miles per hour and should be more.

Installation Manuals - Wall Connector

 

[DanDeStefano]

Can I do it or should an electrician do it?