Simpa Networks offers a simple solution to the expenses of solar installation: pay in installments, just like people do with cell phones.

Nanosolar, which uses an innovative method to get roofs covered with solar panels, is busy outfitting Guard bases around the country. The nation's biggest energy consumer should be its biggest solar customer.

Energy-efficient home improvements cost a lot up front, but eventually pay themselves off. Exactly how long does it take? Consult this handy chart.

The end of the solar company--with $1 billion in investments and hundreds of millions in government loans--is bad for the U.S. economy. But the good news is, it failed because solar power is growing too fast.

Since everyone prefers a good-looking solar cell to a clunky one, GE is working overtime to bring thin film solar cells up to speed.

Bad things are generally cheaper: Like Big Macs. Or H&M. Or coal power. But new research suggests solar power is going to be the wallet-friendliest power option as early as 2013. Time to get into the solar-panel business...

You've no doubt heard of offshore wind power, but how about offshore solar power? Australian solar power company Sunengy would like you to.

A team of MIT researchers develop "self-healing" solar cells that are highly efficient.