Hmm... it seems like the really sweet spot for this type of thing is one that could supply power while you drive. If it could deliver about 7 kW (a little more

Hmm... it seems like the really sweet spot for this type of thing is one that could supply power while you drive. If it could deliver about 7 kW (a little more than the mains plug for a domestic dryer or oven or range), it would supply around 50% to 70% of the car's freeway power requirements. That would double or triple the range, from ~250 miles to ~750 miles.