On 14 days during March, Arizona utilities got a gift from California: free solar power. Well, actually better than free. California produced so much solar power on those days that it paid Arizona to ...

Aerial shot of a solar plant near Gila Bend, Arizona. The power plant is a parabolic trough plant, with molten salt thermal energy storage. Photo via Getty Images Proposed solar energy projects on ...

Forbes contributors publish independent expert analyses and insights. Robert Rapier is a chemical engineer covering the energy sector. On a recent flight from Los Angeles to Phoenix, I glanced out the ...

Electric Research and Manufacturing Cooperative (ERMCO), a distribution transformers manufacturer, is opening a new factory in Maricopa County, Arizona.

Arizona ranks second nationally for rooftop solar and first for utility-scale solar power plants, according to an August report from Ernst & Young. And a July report from Environment America’s ...

Editor's Note: Third Act Arizona was the key organizer of the Sun-Day event. Researchers are coming together from across Arizona for Sun-Day, to see how solar energy keeps the lights on above while ...

PHOENIX (AZFamily/AP) — Arizonans got see quite the sight in the night sky on Tuesday night thanks to powerful solar systems. Photos started to flood into the First Alert Weather Facebook page and the ...

A painting of a white city, clustered around pearly towers and skirted by leagues of brilliant solar panels, wraps the front and back cover of Arizona Highways’ August 1975 edition. The painting, ...