1...I cannot charge to 100%......Tesla has capped me at 98%....Each time I try, car shows only 98% and I have never been able to get the 402 miles of range that the 2020 Model S LR+ is advertised to get....the most I have seen is 396 even when new,,now I have 4500 miles and I guess that is within normal segregation levels but the capping is what irritates me the most
2...I calculate battery range by multiplying the estimated range x Wh/m....I divide that by the SoC percentage displayed on the instrument cluster....then divide that by 1000.....Remember to use the SoC percentage as .XX
Example.......estimated range is 287 miles; Wh/m is 204 (both from the screen); SoC on the IC is 61%
287 x 204 = 58,548.
58,548 / .61 = 95,980
95,980 \ 1000 = 95.9 = battery range
Thats how I calculate to get my battery range....Is this incorrect and if so, is there a better way.......
thanks
There may be some confusion here due to use of terms...
The term capping, as it relates to older cars such as those using 85 KwH pack, was caused by software that limited the maximum BMS voltage to 4.1 to 4,15 VPC, instead of 4.18-4.2 VPC. AKA "Batterygate"
The only way to see this is to read the CAN bus, as the car would display 100% regardless of the actual voltage per cell (VPC). So, folks would see their range drop overnight, even though they could still charge to 100%. See thread "sudden loss of range"
In your case, you cannot charge to 100%, so you may have a cell imbalance, or some calibration problem with the BMS. It might go away, or it might get worse.
Lets assume for the moment you charge tomorrow, and get to 100%, Your RR on the displays is now 394, 8 miles less than nominal or advertised range. That is only a 2% loss! I would be happy with that.
Also, about your calcs, you don't really have a 100 KwH pack. More like a 102 KwH pack of which 98 or so is usable. I believe your 2020 Model S has a buffer of 2 or 4 Kwh, not sure exactly, the CAN bus will tell you.
In addition, even if you had 402 miles of RR on the display, you could not drive that far at the EPA RR consumption. Why? EPA test allows you to use the entire pack capacity, including the buffer, until the car will no longer maintain speed. That means you would be driving past zero miles to get the RR.
Since you have a degradation clause in you warranty, I would get a reader and CAN bus software, and find you actual Nominal full pack capacity, and keep tract of it.