[varjag]

It takes more energy per mile for a walker versus a car, so apparently batteries are ruled out so far.

Solar is not an option in practical transportation. The energy yield per surface area is way too low.

[orionblastar]

So then no AT-AT or AT-ST walkers because of the same problems. Better stick to tanks instead.

[varjag]

Tanks are not exactly solar or battery driven either, am not quite sure what is your point.