Is this normal tapering?

[AndrewTX]

I don’t supercharge very often and was surprised to see this behavior today. So I’d like to get the community’s feedback.
Is this normal tapering for a 2017 MS75? When I plugged into the pedestal(1B) there were no other cars present.
I started the session at 18% state of charge and it quickly ramped up to 112 kW. I then left and went inside for lunch.
When I checked the status via the app 14 minutes later the charger was down to only 34kW at 39% state of charge. No other car had arrived and connected to the paired pedestal (1A).

Is this expected behavior?

 

[P85_DA]

Variety of factors I suspect U were on a V2 charger and in Texas heat it will slow down ..that is not normal tapering in lower temperatures..if on a V3 charger I wouldn’t expect that low rate

 

[ucmndd]

No, not normal, My S75 is still north of ~90kw at 40% on recent firmwares.

Though as already mentioned, there are lots of potential reasons for this and not all of them have to do with the car itself.

 

[cookie99]

yea i'm gonna put my money on heat. but only like $10 of my own money.

 

[Watts_Up]

@AndrewTX May be you should get a Lucid Air !!! /s

Lucid Motors unveils 'fastest charging' EV Air sedan with range of 832 kms​

 

[Missile Toad]

Image below is my data from 2020 on an S70D with 50K miles. If you tried the Huntsville Supercharger -- that one is operating poorly, as documented in Plugshare. Note that the degraded range on the S70D is 230, so 50% SOC is 115. As mentioned, upthread, heat negatively impacts a) the stack of inverters in the nearby corral of Tesla equipment; b) your battery; and c) the cable that connects to your charger port.

 

[ucmndd]

Image below is my data from 2020 on an S70D with 50K miles. If you tried the Huntsville Supercharger -- that one is operating poorly, as documented in Plugshare. Note that the degraded range on the S70D is 230, so 50% SOC is 115. As mentioned, upthread, heat negatively impacts a) the stack of inverters in the nearby corral of Tesla equipment; b) your battery; and c) the cable that connects to your charger port.

This is good data, but the charge taper of the 70 is very different than the 75.

 

[AndrewTX]

Variety of factors I suspect U were on a V2 charger and in Texas heat it will slow down ..that is not normal tapering in lower temperatures..if on a V3 charger I wouldn’t expect that low rate

Relative to usual Texas summers, it wasn't that hot in Houston yesterday - it was in the low 90s around noon. I guess I'd surprised if that were the actual cause. I'm sure it was indeed a V2 charger.

 

[Snerruc]

Charged last week in Georgia in 100 degree hear. Car charged at usual rate but turned off the a/c in the cabin. Reached 90% in 45 minutes. Car is a Raven LR.