Home charging reduced from ~36 to ~25 MPH.

Home charging reduced from ~36 to ~25 MPH.

I had a 2015 MS that was charging around 36 MPH at home and when I started using my wife’s M3 cable it dropped to 25 MPH. I think the MS cable was bigger but I sold my MS and bought a new one a month ago and it has the skinnier cable as well and charges at 25 MPH. Anyone else experience this?

GHammer | 2019年8月3日

New Gen 2 portable connector that comes with the new cars is limited to 32 Amps. Older Gen 1 was capable of 40 Amps.

PrescottRichard | 2019年8月4日

Exactly what Hammer said.

Don’t know why they changed it, and even more odd- when I bought a pre-owned 2016 S from Tesla they gave me a brand new gen-2 cable. Weird.

jordanrichard | 2019年8月4日

Jeffrub your numbers don’t make sense. If for your ‘15 MS you had a HPWC wired to a 100amp circuit, your charge rate would have been 60 mph. If you had a standard 14-50 outlet, it would have been 29-30 mph.

AZGLFR | 2019年8月4日

Yup , old style cable with standard 14-50 , 50 amp breaker ,240v on 2015 MS 85D was 29 mph at 40 amps and is still 29 moh max .

AZGLFR | 2019年8月4日


jeffrub | 2019年8月4日

Hmmm. I have a 240 outlet, it was the same one I used w old MS cable and new cable from a new MS and M3. Are you saying I can buy the older style cable and get back 36? Or just improve what I’m getting from my skinny cables?

Bighorn | 2019年8月4日

You can use the old cable and get 40A instead of 32.

Anthony J. Parisio | 2019年8月4日

Yes the old cable definitely was at 40 AMPS. However I never got more than 31 mph. I never even heard of anyone getting 36 mph.

p.c.mcavoy | 2019年8月4日

Two scenarios where 36 mph would fit for a North America spec car.

One is using a Gen1 UMC charging at 40 amps and they had their display set to ideal miles.

Or, they have a HPWC on a 60 amp or greater breaker and have a mid-2016 or new car with the standard 48 amp on-board charger.

Since the OP indicates their car is a 2015 MS, the first scenario with display set to ideal miles might apply.

impala1ss | 2019年8月5日

I have had the same experience as the OP. My cable (2017 MS) quit working and was replaced by the Mobile Service. He advised this was a new Universal charger that fit all Teslas. It charges considerably slower.

GHammer | 2019年8月5日

"He advised this was a new Universal charger that fit all Teslas."

The old one fits all Tesla's also.

reed_lewis | 2019年8月5日

It is much better to quote the Amperage or kW when referring to charging rates because that is a more accurate number compared to MPH. The best would be to give the Voltage and Amperage.