Forbes contributors publish independent expert analyses and insights. Dianne Plummer is an Energy Consultant and Certified Energy Manager. Rooftop solar has become one of the fastest-growing clean ...

We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Solar panels, also known as photovoltaic cells, absorb energy from the sun, convert it ...

What if your electric company paid you each month instead of the other way around? That's the reality for Doug Kalmer, a Tennessee resident who built an impressive solar setup that powers his life — ...