For years, solar power at home was mostly limited to people who owned their rooftops and could afford the steep upfront costs. But now, a new generation of small, affordable systems — often called ...

Plug Power has taken investors on a wild ride over the past 10 years.

A simple smart plug can save a whole lot of stress.

The Slingerlands fuel cell company will supply 480,000 pounds of liquid hydrogen to NASA's Glenn and Neil A. Armstrong facilities in Ohio.

Plug Power produces hydrogen and uses it to generate clean electricity.

Temperatures may be dropping, but investors are warming up to this hydrogen stock.