This is the diagram accompanying Ford's patent application for a roof-retractable "cocoon" that blankets a parked vehicle with a solar panel array to steal the sun's energy and use it for its own. Some more details while I yell at the sun for being so bright when it knows I forgot my sunglasses today:
The tarp, made from a shape-memory polymer, would protect the car from the elements, while harnessing energy from the sun.
Since the flexible solar tarp would dramatically increase the surface area compared to a simple roof panel, it could capture much more solar power. The patent application also describes a variant of the invention which could automatically retract when it receives a signal that the driver is ready to retrieve their car from its parking space.
Interesting, but do you think the concept *putting on cool guy shades* will ever see the light of day? "I thought you said you forgot your sunglasses." I did, I'm actually just holding up magnifying glasses. "You blind yet?" Definitely getting close.
Thanks to Mark B, who agrees plus you can get freaky under there without anybody seeing.