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Issues with Watt Hours per mile are that most people have no idea what a watt hour is; and the lower the number is, the better.
Maybe we should put the average powertrain efficiency? I.E. ~18% for ICE's and 85% for EV's. Or, both the average and the peak efficiency? I think most ICE's peak around 30-32%, while EV's can peak at ~90%.
By the way, in my xA with most of my grill covered, it still takes 4-6 miles (depending on the season) to come fully to operating temperature (184F), so I'll bet the efficiency during this warm up time is less than 10 or 12%? For an average drive (less than 20 miles), this means as much as 1/3 of the drive is lower than 18%.
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