While the idea of never having to plug in is thrilling, I don't think it will ever be possible with just the roof of the car. The Fisker Karma's solar roof pro

While the idea of never having to plug in is thrilling, I don't think it will ever be possible with just the roof of the car. The Fisker Karma's solar roof produces 120W max (ideal california sunshine conditions). According to Fisker, that equals about 320 km (200 miles) per year. http://www.heise.de/autos/artikel/Beim-Fisker-Karma-sorgt-das-Dach-fuer-Vortrieb-zumindest-ein-wenig-1331102.html http://www.heise.de/autos/artikel/Beim-Fisker-Karma-sorgt-da...