Solar Power for AllThese brothers have set big goals, but that's the only way to make big change.

Lyndon and Peter Rive, 32 and 34, respectively, never tire of meeting new customers. "It's great to see the smiles on their faces when their utility meter starts spinning backward," says Lyndon.

The South Africa-born brothers are the founders of SolarCity, and they've made it their mission to make solar power accessible to everyone. "In the past, solar was typically only available to the wealthy--with a price tag of about $60,000 to install," says Lyndon. "We've designed a system that allows someone to go solar without putting down that money."