mknox
Well-Known Member
I have never seen this "spike" in power when I first start to drive.
Come to Canada in February :smile:
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I have never seen this "spike" in power when I first start to drive.
Come to Canada in February :smile:
I see what you are suggesting.... probably all of Tesla engineering is in California and they have never experienced this "spike" either!
I think it would be interesting if the kinetic energy of the car were considered in the calculations, so it wouldn't "count against" the power used.
I thought Rated was 300 Wh/mi. I believe that is what my car's display shows.
1. 308 Wh/mi. = 85 kWh / 265 mi ... i.e. if the battery pack have exactly as much energy as advertised and none is used for buffer (or the buffer isn't included in the capacity advertised)Now I'm not so sure what it is. I had been under the impression that he EPA 5-cycle testing that led to the revised distance estimates for the 85KW pack boiled down to 308Wh/mi... but I can't find that definitively anywhere now.
When you say your "car's display shows" 300Wh/mi for Rated, what are you speaking of?
1. 308 Wh/mi. = 85 kWh / 265 mi ... i.e. if the battery pack have exactly as much energy as advertised and none is used for buffer (or the buffer isn't included in the capacity advertised)
2. I believe mknox is referring to the "Rated" that is near the 300 Wh/mi line in the Energy chart.
How to you divide 85kWh by 265 miles and get 308Wh/mi??? My calculator says 321Wh/mi. But it works if you apply an efficiency factor for the battery of 96%, which is probably about right. That is, a 96% efficient 85 kWh battery actually delivers 81.6 kWh which at 308 Wh/mile gives a rated range of 265 miles.
When you say your "car's display shows" 300Wh/mi for Rated, what are you speaking of?
Sorry guys, I spaced. 320ish is indeed the number you get from that math.
When I got 308ish, I think it was from doing calculations like these:
New Model S owner charging primer (US) - Page 6
I'm going to have to go back and look now, but I thought there was a horizontal line on the energy display that said "Rated" on one side and 300 Wh/mi on the other. (I keep my displays in "Rated Range" mode). There is another (dashed?) line that shows your average consumption over whatever miles you have it set to average over.