Assume 5 miles per kWH of power, that's a little better than the average EV, but as others have noted, this battery will decrease the vehicle's overall weight a

Assume 5 miles per kWH of power, that's a little better than the average EV, but as others have noted, this battery will decrease the vehicle's overall weight and thus improve efficiency. Then the calculation you're looking for looks something like this: 300 miles range * 1/5 kWH/mile = 60 kWH of power We need to deliver that power in 10 mins, so: 60 kWH * 6 = 360 kW. You need a 360 kW power feed in order to charge this battery in 10 minutes. Keep in mind the average modern household in the US has a 24kW feed, so it would take all the power available to 15 modern US households to charge this car. But it's only need for 10 minutes. Put another way, if people were continually using this commercial charging point all day long - let's say 16 hours for the day - then for the peak power consumption of 15 US households you could charge 96 cars using this fast charge.