Canuck
Well-Known Member
Really? How do you know this?
You're right. I don't know. I should have said "it may still be there", because we don't know if it's an algorithm problem or degradation problem.
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Really? How do you know this?
Just checking in again. My 90% charge went from 242 to 246/247 in the days since receiving the latest firmware update. Not sure if it's the software or rising temperatures here, but I'll take what I can get!
Almost the same exact scenario here, although my 90% is now up to 249.
What are we "supposed" to be seeing at 90%?
Jeff
90% would be about 257, right? (270*1.06)*0.9=257.58.
Really? How do you know this? Has anyone run their 90D down to 0 miles yet and reported here? At this point, even if Tesla *fixes* this through a software update, I'd be more than paranoid that it was just a tweak to the software to hide actual degradation.
Interesting... I remember the first night or two after we got it home it was 259 then came down from there. I always assumed it was because the car's algorithm was adjusting to my wh/mi driving style and that seems to be possibly supported with the conversation here about a algorithm problem. That being said, I'd like to think Tesla could find and fix the "math"...
I paid extra for the 6% as a "just in case" since the 85 would have been fine for 95%+ of our driving so if I paid extra for "nothing" then I'd certainly like to understand that better... My problem is I don't have the time to complain to my local SC, track the communication of that complaint, etc...
Jeff
Nobody's going to run their car to zero and there's no 100% guarantee that would prove anything anyway. Tesla has said "in writing" that nothing is wrong with our batteries based on their tests and that the update will fix the discrepancy. I say we trust them and if we find out different down the rode we can deal with it then.
90% would be about 257, right? (270*1.06)*0.9=257.58.
FYI - not to muddy the waters - but Tesla had published on their website the EPA rated range for the 90D in early-February as 288 miles, but then changed it a couple of weeks later back to the 85D range with an asterisk that the 90kWh pack provides about 6% more. Not sure why, but there you have it :biggrin:
Specs as of 2/8/16:
View attachment 114143
Specs as of 2/25/16:
View attachment 114144
Almost the same exact scenario here, although my 90% is now up to 249.
What are we "supposed" to be seeing at 90%?
Jeff
Just checking in again. My 90% charge went from 242 to 246/247 in the days since receiving the latest firmware update. Not sure if it's the software or rising temperatures here, but I'll take what I can get!
From my understanding of lithium ion batteries, degradation is worse in the first year then slows after that. So you can't expect the battery to have the same capacity six months later, by comparing that number to when you drove it off the lot. However, you can expect that the loss in capacity will not be as significant as takes place within the first year.
I guess the question is, if you discovered you lost 11 of the promised 16 miles you paid $3k extra for in the first 8-12 weeks would you feel ripped off? This, of course, is assuming as you are that it's a real loss and not a software issue.
I posted this in the 90% thread but applies here too. The algo on the car is flexible, learns based on your driving, and no one really drives the idea pattern that original miles are based on. So everyone is going to see their true estimate of rated range go down, and perhaps level off some after a while. Tesla sent me the below a while back:
"
The original ### miles is based on a test of the vehicle’s driving efficiency in ideal driving conditions. Clear sky, no traffic, 60-65 MPH. As the vehicle is exposed to your various driving conditions which can allow efficiency to falter from time to time, the vehicle will soon adapt to the conditions and display a more accurate or real-time estimate of miles based on that history.
Essentially the vehicle’s algorithm that projects usable range has learned your driving conditions/style and thus the apparent loss of range. You should continue to feel confident in your vehicles battery as regardless of what may happen over time you are covered for 8 years Unlimited miles if there is something that comes up with the Battery.
"