Tesla HPWC Charging at Very Slow Rate

[SPF]

Hi! Crowd sourcing here...Any help will be most appreciated.

I just moved into new condo where I have a deeded dedicated spot that by contract is to have a Level 2 240 V 40 Amp outlet. I had my electrician install the HPWC (The black one that has Elon's signature on it. It's about 2 years old but was new and right out of the box - received as a referral reward). At my old condo, where I still can charge as I have yet to rent the condo, I can charge via the 240 outlet at about 19m/hr. At my new place with the newly installed HPWC I am only charging at a rate of 7 mi/hour and as soon as I log in via the app it drops to 6mi/hr.

The Tesla Touchscreen Display won't let me go higher than 12 A when plugged in. When not plugged in, I can adjust that to 40 Amps.

Of Note: The charger is directly wired to the electrical panel in my condo (9th floor) and there is a dedicated 40 A breaker.

Any thoughts on why this is happening and how to fix it would be greatly appreciated.

Thank you!

 

[SPF]

 

[SPF]

 

[Zaxxon]

Sounds like maybe the dip switch inside the HPWC wasn't set to the proper setting to reflect your breaker size, so it's defaulting to a safe (very low) 12A.

 

[Silicon Desert]

Sounds like maybe the dip switch inside the HPWC wasn't set to the proper setting to reflect your breaker size, so it's defaulting to a safe (very low) 12A.

agree. That was also my first thought. The dip switch likely was not properly set when the HPWC was installed. If it is on a 40 amp breaker, then the dip switch needs to be set to 32 amps max.

 

[bhorn]

View attachment 557811

The voltage reading in this pic is 215V. That seems low for a 240V circuit. Is this during the middle of the day when all the other units are running AC? A voltage drop will cause the HPWC to reduce the rate. Did your electrician say what the load rating is for the breaker box?

 

[Hebert]

If the electrician is going to check things, I wonder how long the run is from his breaker on the 9th floor to the parking spot. Is the wire gauge correct for the length of run and amperage?