I think there's a unit issue here. The likely speed of a semi is ~60mph, which conveniently is 1mile/min. So even if you're using 20kW (>25hp) continuously or m

I think there's a unit issue here. The likely speed of a semi is ~60mph, which conveniently is 1mile/min. So even if you're using 20kW (>25hp) continuously or more likely 120kW (>160hp) you'll travel 60 miles in a hour. So 2kWh/mi = 120kWh/60mi.