Yet another 85kWh supercharging thread

[kirkusss]

Recently purchased a 2015 85D with around 87k miles on it.
Today did a supercharging test to see what I should expect on a longer drive. Boy, was I surprised…
Had access to previous owner’s charging curve from 2015 to compare. Same temperature and I drove the car for about 40 miles to allow preconditioning.
Here are the differences:

Percentage	2022 7 degrees celsius	2015 7 degrees celsius
10%	102kW
11%	92kW
13%	90kW	115kW
20%	73kW	117kW
25%	68kW	117kW
30%	66kW	112kW
35%	64kW	104kW
40%	62kW	98kW
45%	60kW	89kW
50%	55kW	82kW
55%	50kW	74kW
60%	46kW	65kW
65%	43kW	60kW

Was expecting 10-15% slower speed, but in this rate 10-80% would be double than it was. The pack has very little degradation, but the speed will be a problem.
Should I raise this to Tesla or this seems the norm for this pack now?

 

[Tam]

...Should I raise this to Tesla or this seems the norm for this pack now?...

In the past, owners have raised the issue of the Supercharger's slower speed but Tesla said it's not in the warranty, so no repairs.

 

[ucmndd]

Should I raise this to Tesla or this seems the norm for this pack now?

They don’t care, they’re the ones that did it. You have no recourse.

 

[kirkusss]

So I should take advantage of the free supercharging, do crazy discharges and hope a cell will call it quits to get a newer pack? (This sounds a bit extreme, but was not expecting to be so bad). On 11 months until the end of warranty…

 

[dbldwn02]

I have a 75d. I'd be happy to see the speeds you're seeing.

 

[cwerdna]

I have a 75d. I'd be happy to see the speeds you're seeing.

I'm guessing you've done a lot of DC FCing and thus have been "nerfed" (90 and 75 battery packs getting nerfed early???)?

 

[Tam]

...hope a cell will call it quits to get a newer pack?...

You can hope but the Tesla battery is resilient so it may only die after your warranty runs out and not before!

 

[kirkusss]

True..my luck probably ran out when my BMW timing chain was replaced 300 miles before the warranty expiration. Even considering a base M3 to not have this in my mind, but the dual motor ans space of the S are hard to beat

 

[henderrj]

I bought some peace of mind from wk057. My warranty dies December 1st, I'm hoping my battery does before that! I've got 250k on the odometer.

And, yes, they slowed the charging to make the batteries last longer. Can't argue that it seems to have worked.

 

[kirkusss]

Indeed, but that would only replace with the same type of pack, no benefit in faster charging (mcu2 upgraded car, only tesla can reprogram it with the bewer 90kWh 350V).

 

[Tam]

...no benefit in faster charging,,,

For those who can afford the best, their practical solution is to get a brand new Tesla with the best charging rate. Then repeat that process again in a few years when the charging rate slows down.

 

[dbldwn02]

I'm guessing you've done a lot of DC FCing and thus have been "nerfed" (90 and 75 battery packs getting nerfed early???)?

No more than 30 times in 5 years. Never seen my rate for above 80. And then it usually settles at 60 after 30%. "Normal" according to Tesla.

Don't really care too much as I only supercharge on road trips.

 

[ucmndd]

No more than 30 times in 5 years. Never seen my rate for above 80. And then it usually settles at 60 after 30%. "Normal" according to Tesla.

Don't really care too much as I only supercharge on road trips.

My 2016 S75 hit 130kw today for a hot minute at about 20% SoC. Your experience is not common or normal.

 

[Rider668]

Recently purchased a 2015 85D with around 87k miles on it.
Today did a supercharging test to see what I should expect on a longer drive. Boy, was I surprised…
Had access to previous owner’s charging curve from 2015 to compare. Same temperature and I drove the car for about 40 miles to allow preconditioning.
Here are the differences:

Percentage	2022 7 degrees celsius	2015 7 degrees celsius
10%	102kW
11%	92kW
13%	90kW	115kW
20%	73kW	117kW
25%	68kW	117kW
30%	66kW	112kW
35%	64kW	104kW
40%	62kW	98kW
45%	60kW	89kW
50%	55kW	82kW
55%	50kW	74kW
60%	46kW	65kW
65%	43kW	60kW

Was expecting 10-15% slower speed, but in this rate 10-80% would be double than it was. The pack has very little degradation, but the speed will be a problem.
Should I raise this to Tesla or this seems the norm for this pack now?

I have a 2015 85D with similar miles. What you are seeing at higher SoC is the “chargegate” reduction in rate which was implemented some time ago. You have SoC+rate= 106 ish which is nearly normal - eg I get about 108. However, your initial charge rate is low. Post “chargegate” Tesla actually increased the peak rate at low SoC from the 120kW limit when the car was new to 130kW - although this is very brief. What has maybe happened is that your pack was not fully warmed up when you started to charge. You note that the ambient temperature is 7, but it is the pack temperature which matters - and I think yours was possibly low. Tesla has helped this a while back by putting in a preconditioning function; if you navigate to the supercharger then it heats the battery for quite a while first - and this would be required at 7degC.
I hope this is what has happened to you and that you can get the higher rates that this car can do, with a warm battery and an unrestricted supercharger, and that you have not been subjected to a cap (although that is still possible…)
Ian

 

[henderrj]

Indeed, but that would only replace with the same type of pack, no benefit in faster charging (mcu2 upgraded car, only tesla can reprogram it with the bewer 90kWh 350V).

I believe you to be incorrect. Check wk057.com.

 

[kirkusss]

The pack was preconditioned before, maybe not long enough…will try another day at higher outside temps and with longer preconditioning. If I still get slow top end will start asking Tesla about it. It’s kind of sad that one of the best packs in term of degradation is slow on charging speed

 

[dbldwn02]

My 2016 S75 hit 130kw today for a hot minute at about 20% SoC. Your experience is not common or normal.

Thanks for the info. I'll try another service request and combine it with the latch recall. My guess is, they'll just say normal ops.

 

[jaguar36]

The pack was preconditioned before, maybe not long enough…will try another day at higher outside temps and with longer preconditioning. If I still get slow top end will start asking Tesla about it. It’s kind of sad that one of the best packs in term of degradation is slow on charging speed

What's to ask about? They nerfed the supercharging speed on purpose, it wasn't an accident. Tesla cares not for its early adopters and is happy to screw them over.

 

[kirkusss]

Did another test Today, same V3 supercharger, 9 degrees celsius outside, battery was at 28 degrees celsius (car still has a debug profile that shows temps) when arrived with 7%. Here are the numbers:
7% 112kW for just few seconds
10% 92kW
12% 85kW
15% 81kW
20% 76kW
25% 70kW
30% 69kW
35% 66kW
40% 64kW
45% 60kW
50% 54kW
55% 50kW

For a total of 37kWh in 33 minutes. I understand Everyone is experiencing slow speeds above 30%, but mine seems low from start. At the end battery was at 40 degrees celsius.

 

[henderrj]

Did another test Today, same V3 supercharger, 9 degrees celsius outside, battery was at 28 degrees celsius (car still has a debug profile that shows temps) when arrived with 7%. Here are the numbers:
7% 112kW for just few seconds
10% 92kW
12% 85kW
15% 81kW
20% 76kW
25% 70kW
30% 69kW
35% 66kW
40% 64kW
45% 60kW
50% 54kW
55% 50kW

For a total of 37kWh in 33 minutes. I understand Everyone is experiencing slow speeds above 30%, but mine seems low from start. At the end battery was at 40 degrees celsius.

Haven't done an exact measurement but that seems very close to what mine does. I've probably used 10 different supercharger stations and it's always about that.