[rabscuttler]

The folk building Lightyear One [0], a fully solar powered prototype car, would disagree with the assertion that it is off limits for now. Obviously the car is quite different from a Prius or any other modern car.

[0] https://en.m.wikipedia.org/wiki/Lightyear_One

[jerf]

I would be very surprised if that car could meet crash-test standards to be sold at large scale. If you don't have to meet crash test standards, you can make a much lighter car than you can today.