Tesla does not tell you how many kWh your pack has that are usable for driving.
But it gives you a battery percentage meter and the number of kWh you allegedly used.
Question #1:
Is the kWh used value you can display on the center console, the actual amount that came out of the battery, or the amount of power used by the motor (i.e. power out of the battery is higher)?
I took how many Kwh I used to go uphill to a ski resort taking my battery from 95% to 20%, and expanded that value to 100% (57.4kWh/75% = 76kWh)
Then I did the same on the way back, 65% to 4%, used 46kWh and expanded the Kwh to 100%, 46/0.61 = 75kWh
I got 75 and 76kWh respectively, which are pretty close. But it seems like a low number for a brand new 90D. I've even read that 85 owners measured their usable kWh to also be in the 75kWh range, which worries me a bit
Question #2: are there unofficial numbers for 85 and 90D that I can compare with?
Question #3: was my measurement method incorrect, maybe because the percent meter is not accurate, or because kWh measures the motor power used and not the power in and out of the battery? Or maybe it doesn't count regen properly? (but that's irrelevant if I got the same error climbing 7000ft up to a ski resort)
Question #4: in my blog post with longer details, this bit worries me:
10:55: Left Manteca Supercharger: 0 miles with 95% (trip router claims I'll arrive with 29% battery)
11:35: Passed by Lockeford Inn: 31 miles with 76% (losing 19% for just 31 miles was both weird and disappointing, by now trip router says I should arrive with 21% battery only)
It feels fishy that I used 19% battery or 14kWh-ish for just 31 miles of simple freeway/highway driving not going uphill. It should have been around 10%. This leads me to believe that the percent meter may not be reliable?
Post with more details and data:
http://marc.merlins.org/perso/cars/...-Area-to-Kirkwood-in-a-Tesla-Model-S-90D.html
But it gives you a battery percentage meter and the number of kWh you allegedly used.
Question #1:
Is the kWh used value you can display on the center console, the actual amount that came out of the battery, or the amount of power used by the motor (i.e. power out of the battery is higher)?
I took how many Kwh I used to go uphill to a ski resort taking my battery from 95% to 20%, and expanded that value to 100% (57.4kWh/75% = 76kWh)
Then I did the same on the way back, 65% to 4%, used 46kWh and expanded the Kwh to 100%, 46/0.61 = 75kWh
I got 75 and 76kWh respectively, which are pretty close. But it seems like a low number for a brand new 90D. I've even read that 85 owners measured their usable kWh to also be in the 75kWh range, which worries me a bit
Question #2: are there unofficial numbers for 85 and 90D that I can compare with?
Question #3: was my measurement method incorrect, maybe because the percent meter is not accurate, or because kWh measures the motor power used and not the power in and out of the battery? Or maybe it doesn't count regen properly? (but that's irrelevant if I got the same error climbing 7000ft up to a ski resort)
Question #4: in my blog post with longer details, this bit worries me:
10:55: Left Manteca Supercharger: 0 miles with 95% (trip router claims I'll arrive with 29% battery)
11:35: Passed by Lockeford Inn: 31 miles with 76% (losing 19% for just 31 miles was both weird and disappointing, by now trip router says I should arrive with 21% battery only)
It feels fishy that I used 19% battery or 14kWh-ish for just 31 miles of simple freeway/highway driving not going uphill. It should have been around 10%. This leads me to believe that the percent meter may not be reliable?
Post with more details and data:
http://marc.merlins.org/perso/cars/...-Area-to-Kirkwood-in-a-Tesla-Model-S-90D.html
