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90D Range slowly declining

rawn77

Member
Aug 11, 2015
34
3
Montreal, QC
I received my S90D September 15th. At first with a 90% charge my range was 258 miles.
Since then my range has slowly crept down to where tonight I hit a new low of 251.
I'd like to know what other 90D owners are getting at 90%.
Is my slow decline normal?

Please chime in.

Regards
Ron
 

Panoz

Member
Nov 19, 2013
304
10
Colorado Springs, CO
Gosh - I can't believe I didn't write down my miles at a specific charge %. I know I've changed the charge point a few times already. I'll set the charge point to a fixed amount and keep track of the miles from now on.
 

travwill

Active Member
May 1, 2015
1,577
894
Marble Falls, TX
From what I've seen on here, it shouldn't really be the battery degrading or anything yet - instead it is the algorithm for estimating rated miles that is just estimating a lower amount. It does that based on your driving patterns which is likely not as conservative as what the standard rated would be (e.g. perfect temp, flat roads, x slow speed, not launching too fast, etc.). I'd think you'll settle into a lower number and then stay there soon...
 

msnow

Active Member
Jul 14, 2015
4,951
2,236
SoCal
I received my S90D September 15th. At first with a 90% charge my range was 258 miles.
Since then my range has slowly crept down to where tonight I hit a new low of 251.
I'd like to know what other 90D owners are getting at 90%.
Is my slow decline normal?

Please chime in.

Regards
Ron

Same issue here. I got delivery the same day you did 9/15. Started at 257 now 253. I plan I bringing it up with the SC whenever I bring it in the first time.
 

Battman

Member
Sep 7, 2015
57
5
Calgary, Alberta, Canada
Got my 90D on Sept 9. Got 414-416km for the first couple of weeks. Now getting closer to 406-408km. Been super careful to keep it above 25%, and have never charged it to 100%. Was told by the Vancouver a Service manager that this is normal. Supposedly will go down the first couple of months and then should stabilize.
 
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TSLAX

Member
Nov 23, 2014
52
41
Cambridge, Ma.
Yes we have experienced the same. On Oct 5 when the car was delivered, the car was charged to 90% and 263 miles. After delivery, it has steadily been declining. Today it was at 255 after charging to 90%. My husband spoke to our DS today and he said it was due to driving patterns. My husband has used the car mostly on the highway and somehow this is the reason why it has declined.
 

andrewket

Well-Known Member
Dec 20, 2012
5,704
1,525
Two things going on here.

1/ The BMS adjusting it's estimate of the capacity of the pack, using a variety of factors.
2/ The first year is the worst for battery degradation. You guys probably are seeing some real loss. It will level out.
 

gg_got_a_tesla

Model S: VIN 65513, Model 3: VIN 1913
Jan 29, 2010
6,534
769
Redwood Shores, CA
It's very odd though. If someone's consistently charging to 90%, they shouldn't be seeing this much of a loss.

I've had my P85D for ten months now and have consistently charged to 90%. I've stayed at 226 miles for the most part and only recently dropped to 225.

Is the new chemistry in the 90 packs behaving differently from that in the 85 packs?
 

CHG-ON

Still in love after all these miles
Jun 24, 2014
3,079
636
Santa Cruz Mountains, USA
My 90% dropped from 236 to 232 suddenly in late August or early September on my 85 pack. I think it may have been related to an update. But I wasn't really paying attention to it. I was really worried at first. But it has stayed at 232 since. I do think it may be an algorithm change.
 

andrewket

Well-Known Member
Dec 20, 2012
5,704
1,525
It's very odd though. If someone's consistently charging to 90%, they shouldn't be seeing this much of a loss.

I've had my P85D for ten months now and have consistently charged to 90%. I've stayed at 226 miles for the most part and only recently dropped to 225.

Is the new chemistry in the 90 packs behaving differently from that in the 85 packs?

My P85D which is also 10 months old is at 221 @ 90%, and has been for awhile. 100% is now 249. It was 253 when new (I think).
 

Max*

Charging
Apr 8, 2015
6,670
3,719
NoVa
(70kwh battery): My 90% dropped by 2% in 4 months/10k miles.

Started off with 214-218RM at 90%, now I'm consistently at 210RM for 90%. I think my 100% dropped from 242RM down to 235RM.
 

ecarfan

Well-Known Member
Sep 21, 2013
19,283
13,951
West Vancouver, British Columbia
I received my S90D September 15th. At first with a 90% charge my range was 258 miles.
Since then my range has slowly crept down to where tonight I hit a new low of 251.
I'd like to know what other 90D owners are getting at 90%.
Is my slow decline normal?
It is well known that, on an annual basis, Teslas experience the highest battery capacity loss in the first year, somewhere around 2%, and then in subsequent years it is around 1% or less, on average. There are of course exceptions, but that is the average. What you describe does not sound excessive to me, though it might be slightly more than average.
 
Last edited:

jerry33

(S85-3/2/13 traded in) X LR: F2611##-3/27/20
Mar 8, 2012
19,823
23,218
Texas
Use Ideal rather than Rated range for battery degradation. Tesla seems to mess less with that algorithm. Note that there can also be battery imbalance which will show less range. FWIW my S85 is at 95% at ~60k miles and 2 years 8 months. No idea how much of that is imbalance.
 

deonb

Active Member
Mar 4, 2013
4,060
4,215
Redmond, WA
My 100% when I got the car was at 257. Today - 25k miles and 2.5 years later its at 258. If I only charge to 80% for months and then 100% charge again it goes down to 253 and then comes back up after a few range charges.

If you only ever charge to 90%, the estimate means very little.
 

msnow

Active Member
Jul 14, 2015
4,951
2,236
SoCal
My 100% when I got the car was at 257. Today - 25k miles and 2.5 years later its at 258. If I only charge to 80% for months and then 100% charge again it goes down to 253 and then comes back up after a few range charges.

If you only ever charge to 90%, the estimate means very little.

deonb - 100% 257 for a 90D?
 

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