Aniket Bhor is a contributing writer for USA TODAY Homefront specializing in solar power. He has a master’s in renewable energies, and he has spent the past decade working as a solar engineer ...

Read more: 12 Smart Gadgets You Didn't Know Existed There are two main types of solar heating systems: active and passive. Active systems are more complex, using pumps, temperature sensors, ...

It’s the third rooftop installation of a solar-powered water heating system that Petros Mihali and his assistant, Soteris, ...