Last week, Tesla Motors announced an ambitious new product line: batteries to powerhomes or businesses.

The idea is that homes and businesses powered by solar panels could harvest and store energy during the day that could be used to run homes at night, or be used as a backup during a power outage.

"Our goal is to fundamentally change the way the world uses energy," the company's founder, Elon Musk, said at a news conference April 30. [Creative Genius: The World's Greatest Minds