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djp
Model 3 Performance
The degradation might be heat related. Are you normally parked in an air conditioned garage or outdoors? Do have an estimate of average ambient temperature? If you're usually parked in the heat you can slow down the degradation by lowering your SOC.
FredTMC
Model S VIN #4925
Thanks! I'm trying this today. Just got home from Teslive. I'll report back my results.
djp
Model 3 Performance
The Roadster balances at the end of a Standard Mode or Range Mode charge, and the balancing happens faster in Range Mode.
We don't know when the Model S balances or how it handles balancing when charging to a lower percent SOC. It's a safe guess that balancing is faster after a 100% charge like the Roadster.
djp
Model 3 Performance
I'd avoid parking in the sun if possible, and drop your SOC to the lowest range you feel comfortable with.
At TESLIVE I noticed the Roadsters are a lot more aggressive in active cooling than the Model S. The charging Roadsters all had their ACs screaming to keep the battery temperature down while the Model S' compressors never seemed to come on.
A 90% charge is about 238 miles. You're pretty close, I wouldn't worry about it.
stopcrazypp
Well-Known Member
djp
Model 3 Performance
It was low 80s, and certainly not a scientific study. Anecdotally though, we had a lot of forum members notice the battery heating over the winter and it seems odd there have been few reports of battery cooling this summer. Either it's a really quiet and low energy AC compressor, or the whole BMS temperature range is shifted up compared to the Roadster.
I've seen a similar change - I have about 7000 miles on mine and the rated range in the morning (with a standard charge) recently dropped from 239 to 228 miles. 239 miles is 90% of the EPA rated range of 265 miles, and 228 is 86% so that's 4 percentage points decline in 6 months which is a little disconcerting. Or it could be a result of some kind of recalibration after going to v 4.5 of the firmware. I didn't notice if the decreased mileage started right after the upgrade or not.
Is this common? Tesla any feedback?
The standard charge definitely changed between 4.4 and 4.5, so comparing them is pretty useless. If you want to check if you've had degradation, you really need to do a range charge.
Yep. Since there is not any way yet to get a CAC value for a Model S, you might as well use a ouija board to see what your degredation is.
I have noticed that the percentage bar and rated range vary a bit(sometimes by as many as 10 miles of rated range at a certain percent value), for each charge. Point being that rated range is a complex calculation taking many variables into account. Unless the rated range drops substantially, deriving a degredation amount from it is impossible.
FredTMC
Model S VIN #4925
I gained 3 miles back on a standard charge! Yippie.
To battery balance my car, I did a full range charge last night on 110v and i got back a 3 mile increase on a subsequent standard charge of my 60kwh car. It has 9700 mi on the odo. I'm now at 185 mi instead of 182 mi on a standard charge using firmware 4.4
Interesting observations during the full range charge using 110v:
- the car topped off showing 199mi
- the car's charge port ring stopped blinking/pulsing when it reached 199mi but the car proceeded to continue to charge for over an hour. I presume the battery balancing was occurring during this time.
I'm absolutely thrilled that I now know how to rebalance my battery when std range starts declining over time.
Note that in order to more quickly do the full range charge I first did a standard charge on 40a 240v. Then, did a slow range charge using 110v plug
How many rated miles did you start with when doing the 110v charge.
Odd that you topped off at 199 mi doing a full range charge. That's a number I've never seen or heard of before on a 60. On 4.4, I thought the bug in the firmware was that 197 would be the max rated miles displayed even when the battery was fully charged. The two or three times I range charged before installing 4.5, the car continued to charge for some period of time after hitting 197 rated miles, and then when I began driving I would normally drive for 10 or so miles before the rated miles would decline. I haven't done a range charge since installing 4.5 so don't know what the max rated miles will show, although I've read others getting numbers around 203-05.
Odd that you topped off at 199 mi doing a full range charge. That's a number I've never seen or heard of before on a 60. On 4.4, I thought the bug in the firmware was that 197 would be the max rated miles displayed even when the battery was fully charged. The two or three times I range charged before installing 4.5, the car continued to charge for some period of time after hitting 197 rated miles, and then when I began driving I would normally drive for 10 or so miles before the rated miles would decline. I haven't done a range charge since installing 4.5 so don't know what the max rated miles will show, although I've read others getting numbers around 203-05.
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