There are plenty of engineers who reckon harnessing the sun's rays could be the answer to our energy crisis - because whether you think cars are a huge cause of global warming or not, oil will run out.
But those building these things have a long way to go. Cheap motoring, yes; stylish and rapid transport, most certainly not.
Most of them look like refugees from Tracy Island, and those that don't, will hardly excite petrolheads. Check out our gallery for some of the world's weirdest solar powered cars: