davewill wrote: Everyone is simply guessing about charger efficiency. At least the 21 kWh number is useful when combined with the dash mpk.
Yes, we are guessing. But, if we're going to use the energy consumption numbers that match the speed, then that number comes up to 21kWh.
What it really is.... seriously, it's not important except as a number to divide/multiply by.
3.9kWh will roughly correspond to 60 mph and a range of 81.9 miles.... those numbers work close enough for most people's use. And to get there, we had to use 21kWh.