Ford Motor Company has just changed the definition of "sunroof". Ford debuted Solar Energi, a concept car version of the Ford C-MAX plug-in hybrid in January 2014. According to Mike Tinskey, Ford's Director of Vehicle Electrification, the Solar Energi can both convert solar energy and use conventional electrical grids for power.
Ford and it's contractors, re-invented solar panels to power the weights of conventionally designed cars. Contractors working on the Solar Energi project team include Sunpower, Eaton, Whirlpool and students at Georgia Tech.
The current plug-in Ford C-MAX version achieves 108 mpg in the city and 100 mpg combined. There's no word yet on how much Solar Energi will top that or horsepower production. But Ford claims that Solar Energi's roof top panel redesign produces 50% more energy than the typical solar panels used in solar racing cars.