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Range increase (split from Master Thread: 2019.40.2)
- Thread starter Tholland
- Start date
Google EPA.
Haha JK, here you go: Download Fuel Economy Data
Download the one for 2020 and scroll wayyyy over to the right side and it says this: "Combined range voluntarily lowered from 332 miles"
Sooo for some reason the performance cars get better range but Tesla wanted to hide that fact and artificially limited the range to match the other AWD cars.
diamond.g
Active Member
eladts
Member
Why do people car so much about the max range when the display is set to miles? It is decided by a trivial calculation and doesn't really mean anything. Tesla could make the car show 500 miles if they wanted to.
If you listen to the conference call, it seemed like he misspoke. They were talking about the 5% power increase. If you've heard Elon, he sometimes stumbles for words, as he thinks faster than he can talk, or the other way around. Either way, it seemed obvious that he misspoke.
AlanSubie4Life
Efficiency Obsessed Member
@XLR82XS has not posted any pictures showing this to be true. I'm not saying I don't believe him, but his is the only report I have seen so far and I haven't seen pictures showing the new constant (pictures of the Energy->Consumption screen showing, in a single picture, rated miles remaining, projected range, and prior efficiency are sufficient to prove the new constant).
We HAVE seen such a picture for the SR+ - there is one person who reports ~250 miles at 100%, and his Energy screen shows that the constant/s has/have changed (the constant is lower than it was for earlier SR+ vehicles). (Previously the charging constant established with this method for the SR+ was 219Wh/rmi; now it is about 213Wh/rmi.)
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AlanSubie4Life
Efficiency Obsessed Member
I care about it because it shows me the car's best estimate of the energy available in the battery relative to when it was new, assuming the charging/BMS constant has not been changed (which can be determined independently, and if it has changed, used to scale the result appropriately).
Full Battery Capacity:
Battery Full kWh = Rated Miles @ 100% * Charging Constant
or...
Battery Full kWh = Rated Miles @ 100% * BMS Constant + Buffer Size (Wh) (Buffer Size only available via CAN read, typically 3.3-3.5kWh for AWD)
Lines & Constants
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And I care because if Tesla submitted a version of software to the EPA that has some kind of magic efficiency improvements that are supposed to be representative of model year 2020 cars, I want to know why my car does not have this more efficient software.
Knightshade
Well-Known Member
Maybe?
But then if the 990 is less efficient, how did the AWD suddenly go from 310 (last year
AlanSubie4Life
Efficiency Obsessed Member
Just remember that the Performance is voluntarily derated (from 332) to match the AWD. So it's a small difference but apparently it is there (obviously this is just in regards to the 980 vs. the 990 that are installed in 2020 vehicles - who knows what the differences are with the older 980 and 990 motor versions, if any. The front motor is identical (amongst the 2020 vehicles) per the EPA datafile).
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dandrewk
Active Member
Agreed, he said something to the effect of "we should do better with a software update" while talking about increasing the Model S range. It's ambiguous, to say the least. It's not surprising that a couple of websites took that to mean a model/trim wide increase in range.
AlanSubie4Life
Efficiency Obsessed Member
Can you take another picture of that screen with the three relevant numbers? Curious if they have just limited your energy or whether they are playing around with constants.
AlanSubie4Life
Efficiency Obsessed Member
I would be patient for now. As long as your car does not degrade in capacity too much before the range “increase” you will likely see the increased rated miles (and a reduced constant - so take a picture of that Energy -> Consumption screen with the three numbers - rated miles, projected range, and interval average efficiency for your records!) on your 2020 vehicle soon. Maybe it will be a Christmas present!
AlanSubie4Life
Efficiency Obsessed Member
Sorry man. Hard to get a good read on it with just two significant digits...maybe another time when you have more than 100 miles remaining, we can get a better estimate.
This calculates out to 216Wh/rmi, but it is only two significant digits. So it could be off by a lot.
Thanks for the pictures...maybe another one some other time...
EDIT: No need for the lifetime Wh/mi for this calculation. Just those three other numbers, and they all should have three digits. Set display to miles, make sure you have a good charge, pull up that energy screen, make sure it is not set to “instant range,” and take a picture - that’s all that is needed.
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