I suggest you perform a SpC taper curve and compare with those available for 90 kWh packs. This would be a true litmus test, as you would see far worse performance at your apparent degradation level.
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I suggest you perform a SpC taper curve and compare with those available for 90 kWh packs. This would be a true litmus test, as you would see far worse performance at your apparent degradation level.
He should do a what? Why not just press for the fix from Tesla. They're saying there is no degradation.
wouldn't it be fairly easy to try to run the car down and see what range the car delivers despite what the readout says? I know it is risky but with planning it could be done so you wind up near a supercharger after 220 miles or so.
BertL
Active Member
To some degree, this has been done, but as is so often the case in the world of MS, the devil is in the detail getting down to that very last drop of energy and taking that risk. IMHO, we're sort of beginning to rehash the older and more detailed 90D Range Slowing Declining thread -- at least when it comes of S90 challenges some of us are seeing. 
No because "rated range" is an EPA estimate not real driving miles. Actual miles are based on too many variables as you know. We use it as a baseline as it starts dropping. Tesla agrees this is an issue and has promised to fix it and I'm sure they will but we don't know when.
After lots of driving and a full charging cycle, half of the initial increase in reported range I observed after the update is gone at 90% level: I am at 373km down from 385 after the update (with 360 on 7.0).
Although perhaps it could be related to the car being parked outside right now at -10 Celsius (plugged), not sure if this affects reported range.
Although perhaps it could be related to the car being parked outside right now at -10 Celsius (plugged), not sure if this affects reported range.
mknox
Well-Known Member
In about 3 years, I have never once experienced any range estimate changes over firmware updates. Not even 1 mile. And I didn't this time either. Not sure why some folks see it and others don't.
Owner
Active Member
Well my data is in. A full range charge on 7.0 - 241 miles, 7.1 - 240 miles. No noticeable change. The 1 mile difference is sometime when doing a full range charge it loops sort of indefinitely.
My first full range charge tonight on 7.1 shows Rated Range of 243 vs. 240 on 7.0; doubt there is any meaningful difference in actual range.
MarcG
Active Member
MarcG
Active Member
On subject, I observed an interesting jump in rated range reported by the car overnight.
For background, I use VisibleTesla (VT) to keep track of various metrics that Tesla makes available through its public API.
To minimize the amount of polling VT does, I put the car to "sleep" during night hours, meaning VT only gets data every 33 minutes or so.
Anyway, between 1:24 and 1:57 am PST, the rated range reported by the car went from 85 to 91 miles!
I usually see the range drop slowly overnight, so this was definitely surprising to see.
One theory I have is that I've been in cold weather (around freezing) the last few days, but drove back to San Francisco yesterday where temps are above 10ºC (50ºF).
Could it be that the algorithm is adjusting up as the car reenters warmer weather?
For background, I use VisibleTesla (VT) to keep track of various metrics that Tesla makes available through its public API.
To minimize the amount of polling VT does, I put the car to "sleep" during night hours, meaning VT only gets data every 33 minutes or so.
Anyway, between 1:24 and 1:57 am PST, the rated range reported by the car went from 85 to 91 miles!
I usually see the range drop slowly overnight, so this was definitely surprising to see.
One theory I have is that I've been in cold weather (around freezing) the last few days, but drove back to San Francisco yesterday where temps are above 10ºC (50ºF).
Could it be that the algorithm is adjusting up as the car reenters warmer weather?
I observed the same thing. Over the weekend, my car was parked outside and I noticed a loss of reported range compared to after the 7.1 update. On Sunday, it entered a warmer climate (my garage) and was 10km higher than in the cold.
BertL
Active Member
Like the FlasherZ data and what msnow suggested, I also believe these rated range changes MarcG and orlenok are reporting, are more related to temperature increases than any improvements 7.1 may have provided. I've yet to see any real difference in my S90D here in SoCal with 7.1, but then, temps have been relatively stable and moderate the last several days -- around a mean of 56F and low only 52F.
Texas
Member
No change on my May 2015 P85D after loading 7.1. My 90% was 227 on delivery in late May. It has gradually drifted down to 224 as of mid-January 2016.
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