That’s assuming 50kwh will power a car 500 miles.
That is 100wh per mile. There have been many cars built that used that little energy. Not an SUV, but people building electric cars dedicated to lowest energy use.
There are home-converted SUV’s carrying around 1500 lbs of lead-acid batteries that still use less than 400wh per mile.
Visit www.evalbum.com for examples of home electric vehicle conversions. Certainly purpose-built vehicles will be more efficient than those.
Even the GM Impact (EV1) used only 160wh per mile for cruising at 55mph. And it carried over ten times as much weight in batteries as the EESTOR cap would weigh. Removing 1000 lbs of batteries from the EV1 might yield 100wh per mile.