J.S. Turissi wrote:Electric? Not good for hauling.
Marcos Buenijo wrote:Photovoltaics with electric motor drive is another possibility.
Topher Belknap wrote:Perhaps, if you are willing to travel a horse pace. The ELF has a solar panel, but it needs to sit in the sun stopped for hours to recharge a full charge (about 30 miles). A Prius with a solar panel doesn't even bother, it only runs the vent when parked. Solar racers are ALL solar panel, and have drag areas around 1 ft². Solar is diffuse, locomotion requires a lot of power.