TravelFree
Active Member
Did you ever see a warning on your Tesla asking you to charge to 100% once to recalibrate the BMS? I did once after a couple thousand miles on the new M S.
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TravelFree
Active Member
TravelFree
Active Member
I typically get only 165KW on my 2020 LR+ M S. But the new M Y gets 250KW for brief periods. Interestingly both Teslas take about the same time to get to 90%, about 45 minutes. 80% is about 35 minutes.
Until Tesla modifies the taper curves, looks like there is no real advantage to the V3, or the latest tech on battery. The M S is 18650, and the Y is 2170 cells.
Efficiency is measured in Wh/km. kW/hr is implausible.
Let’s say your 75D has 70 kWh of energy available, that’s 70,000 Wh. 70,000 Wh / 165 Wh/km = 424 km range on a full charge. Since you choose to only use 62% of that, your range is 263 km.
Wh/km is a driving style and a function of car efficiency, not a degradation measurement.
You should get the same wh/km at 72% charge as at 10% charge and about the same wh/km when new as when your battery is degraded 50% in maybe ten years.
Try this indtead, take a note of your charge percentage when pretty full, say at 72%. Then change this display from percent to distance and note the range in km. Then divide the km by the percent.
When new, your car would work out to maybe 300km at 0.72 or 418km for 100% (300/0.72=418 i.e. 72% of 418 is 300).
Now if it reads 240km at 0.72 then you have 333km at 100% (240/0.72=333). That would be 20% degradation (333/418=0.80), or worse than average.
If it reads 255km at .72 then you have 354km at 100% (255/.72=354 and 354/418=0.85). That would be 15% degradation or maybe average.
Few three year old 75Kw cars will be above 270km at 72%. That would be only 10% degradation.(270/0.72=375, 375/418=0.9)
As @Krash said, you're asking about your vehicle's efficiency, not its degradation. Your efficiency seems to be very good.
If you want to know your battery's capacity, charge it to 100% and tell us how many miles it says it can do (referenced from the battery indicator, not the energy screen). Compare that number to what your vehicle's rated range was when new to see total degradation or reduction in capacity from new. If you prefer not to charge to 100%, you can charge to 90% and divide the displayed range by .9 to get an estimate of your 100% capacity.
Great advice from all I will be driving on a road trip this weekend so I'll charge to 100% to see. Have only charged to 100% about 6 times in 4 years, usually keep around 70 to 80 % charge and mostly charge using Tesla Wall charger at home. So hopefully not too much degradation.
So 9.7% degradation. (1-(272/0.72)/418)) That is great. Most people have 10% their first year.
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Aug 2016 build with AP1 / MCU1 . 94000 miles. My 90% is 206-208 miles, full charge around 229 miles. When new, the numbers were 232 and 259 respectively. Used to drive extremely long distances every week, but not much in the last 2.5 years. Almost all of the degradation was in the first 2-3 years, essentially nothing since. If anything I've gained back a few miles after recent firmware upgrades and longer drives, up from 199-200 to ~207 now. I find the reported range increasing a few miles when I have Chill Mode on. I got 118kW peak charging rate.
I get functionally almost rated range doing keeping up with freeway speeds during family road trips, with iPhones/iPads plugged in and the air con running at 8-10. Very recently I did Bay Area to San Diego with 2 stops (Kettleman City, Santa Clarita) quite comfortably. I've read that Santa Clarita - San Diego is hard in a 75D but I didn't have a problem, starting with just under 90% in either direction and making the destination with ~15-17% left continuously doing the carpool lane speeds on the I5/I405, which were keeping up with left lane traffic.
I get functionally almost rated range doing keeping up with freeway speeds during family road trips, with iPhones/iPads plugged in and the air con running at 8-10. Very recently I did Bay Area to San Diego with 2 stops (Kettleman City, Santa Clarita) quite comfortably. I've read that Santa Clarita - San Diego is hard in a 75D but I didn't have a problem, starting with just under 90% in either direction and making the destination with ~15-17% left continuously doing the carpool lane speeds on the I5/I405, which were keeping up with left lane traffic.
Finally found a reason to charge my July build 2017 S75D, FSD upgrade , MCU 2 upgraded , firmware 2021.4.18.2
100% 392km/243 miles at 100% Usually only charge to 70% and have charged to 100% about 20 times in 4 years. Also rarely used Supercharger, mostly home charge with Tesla Wall Charger at 11.5 kw ,48 amp ,240 volt.
100% 392km/243 miles at 100% Usually only charge to 70% and have charged to 100% about 20 times in 4 years. Also rarely used Supercharger, mostly home charge with Tesla Wall Charger at 11.5 kw ,48 amp ,240 volt.
The questionable point in this calculation is that an almost new car usually does not display its full rated range, see:
The question is, are the batteries already degraded when they roll out of the factory or should we use the average displayed mileage of new cars as the measure for zero degradation?
Just reporting since I've got some supercharger experience with it now. A 2016 AP1 S75D with 33k miles. I was at the charger in Littleton MA and starting from 5% it was pulling 120kW pretty much the whole time and was still charging north of 100kW when we left at 38%. This charge took only 13min according to TeslaFi. I was very relieved to see such a healthy charge rate as I was mentally prepared for it to hit 100 and taper down from there immediately (as I saw on the day I took delivery of the car, though at that time I did not start from such a low state of charge). I didnt supercharge it much at all pre-MCU2 upgrade, so i don't know if this has something to do with it. It might.
Overall, though, it's been disappointing to see that anywhere in the city of Boston, the chargers are inside paid parking garages with 72kW max chargers, so it's both slower and you have to pay $12-13 upon exiting the garage. So it blows a lot but now I know to just plan my routes to go to the one on route 9 or go to Revere. I suppose the cambridge one at $5 for half an hour (not 24/7 though) might see some use from me. (edit: some sites say the south bay one is free parking? nice!)
Overall, though, it's been disappointing to see that anywhere in the city of Boston, the chargers are inside paid parking garages with 72kW max chargers, so it's both slower and you have to pay $12-13 upon exiting the garage. So it blows a lot but now I know to just plan my routes to go to the one on route 9 or go to Revere. I suppose the cambridge one at $5 for half an hour (not 24/7 though) might see some use from me. (edit: some sites say the south bay one is free parking? nice!)
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ucmndd
Well-Known Member
Probably pretty accurate. But there’s no reason not to charge to 100% if you want to check.
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