Charging locked at 32/48A

[voltij]

2022 Model S LR
Tesla Wall Connector Gen3 purchased Feb 2021 (and only just now getting around to installing it)
60A breaker (Square-D)
150A home service
Southpoint 6-3 NMW/G wire, ~8 ft run

Commissioning worked fine, I selected USA -> 60A breaker

Car claims a "grid" problem and locks the charge amperage to 32A.

Can someone here help or direct me to solutions?

 

[voltij]

Just switched around my search terms and found this result

60 Amp circuit HPWC gen 3 only charging at 32Amps

First, let me disclaim that I am not very knowledgeable with electrical stuff. I bought a Gen3 HPWC for my garage from a forum member. I hired a licensed electrician to install it. My main panel (200amp service) is about 40 feet from my garage, so he ran it using a 6awg cable and a 60Amp...

teslamotorsclub.com

I now assume this is what is happening to me.

 

[voltij]

Update:

I pulled out the 6/3 ROMEX and ran two new 4 gauge THHN runs inside a flexible conduit with properly secured end connectors.

Same problem.

Can someone assist?

 

[dafish]

2 new connectors? And the ground is?

What is voltage at the end of connection to wall connector when it's charging?

A-B​

A to Gnd​

B to Gnd​

Have you confirmed it's all tight?
Is the breaker rated for 75C or greater?
Have you tried this when there is no appreciable load in your home?

I ran into something like this charging an S from a portable generator. Thing would not take more than 30 amps. Generator will, and has, delivered 42 continuous through a low distortion head. Never did know why. I assumed the Tesla didn't like the idle down circuit and was seeing a brief voltage sag as the generator spun up. Is why I wonder about your voltages...

 

[dafish]

Also:

2022 Model Y charging capped to 32 on 60 Amp circuit

New member here! I just picked up my MYLR literally today (10/5), everything looked good until I came back home to charge the car for the first time (yay!) with gen 3 wall connector installed 6 months ago. The wall connector was installed using THHN 4AWG hooked up with 60A breaker on a 200A...

teslamotorsclub.com

 

[voltij]

2 new connectors? And the ground is?

What is voltage at the end of connection to wall connector when it's charging?

A-B​

A to Gnd​

B to Gnd​

Have you confirmed it's all tight?
Is the breaker rated for 75C or greater?
Have you tried this when there is no appreciable load in your home?

I ran into something like this charging an S from a portable generator. Thing would not take more than 30 amps. Generator will, and has, delivered 42 continuous through a low distortion head. Never did know why. I assumed the Tesla didn't like the idle down circuit and was seeing a brief voltage sag as the generator spun up. Is why I wonder about your voltages...

Sorry about confusion. After tearing out the ROMEX, I removed the outer jacket and retained the white sleeved wire from the 6/3 as my ground. I purchased 4 gauge THHN from HD today as well as a 3/4dia x 6' flexible conduit run kit.

Everything very tight.

Breaker is as found at Home Depot: Square D QO 60 Amp 2-Pole Circuit Breaker(QO260CP) QO260CP - The Home Depot
A comment indicates 75C rated.

I can turn everything in the home off and test tomorrow.

Can I read the Voltages from the HPWC service screen on my phone after initiating a charge? I haven't tried that.

I read through the thread linked. I should try to visit the service center and see if I can get more than 32A.

 

[DownshiftDre]

Have you tried manually starting it at a low amp setting from your app/car and increasing it slowly on your own and see what happens?

You can monitor voltage during this and see what is happening?

 

[DownshiftDre]

The other thing I am thinking if one of the lines in your onboard charger in the car is failed. There are 3x16A @ 240V that handle the AC/DC conversion within the PCS, I believe. That would be worst case and would need to find another known working 48amp charger to isolate issue.