Two companies plan to use novel solar storage technology to power households on summer nights.

One of the greatest problems of large scale solar power facilities is that they do not produce electricity at night, and when they do produce power, it is constantly fluctuating with the sun’s strength. Under development in the deserts of Tonopah, Nev…

Some companies are betting that the increased use of solar panels will open the way for solar thermal, a kind of energy storage that compensates for the vagaries of photovoltaic generation.

Two years ago, India said it would drastically increase its use of solar power by 2020. Many analysts said it couldn’t be done. Now they aren’t so sure.

Two auctions of electricity generated with solar power were far more successful than anyone anticipated.

Shell says that as much as 40,000 barrels’ worth was released during an accident 75 miles off the coast.

India’s rapidly expanding nuclear power sector is stirring anxiety about insufficient regulatory safeguards.

It’s always sunny in low-Earth orbit, so what better place to look for a source of solar energy? With the end of “cheap oil” rumored to be rapidly approaching (if not already upon us), not to mention the effects of fossil fuel use upon the environment …

A proposal from the Bloomberg administration and City Council would make it easier for property owners to add insulation to exterior walls, for example, and install awnings, skylights, green roofs, solar panels and greenhouses.

Estimating that 40 to 50 percent of the cost of owning and operating a rooftop solar power system is administrative expenses, the Department of Energy organized a competition to find the best ways of bringing those costs down.