The San Diego County Water Authority has an unusual plan to use the city's scenic San Vicente Reservoir to store solar power so it's available after sunset. The project, and others like it, could help ...

Solar panels and wind turbines give the world bountiful energy — but come with a conundrum. When it’s sunny and windy out, in many places these renewables produce more electricity than is actually ...

In a sandy field on the edge of the Mojave Desert in Lancaster, California, an array of solar panels sits next to dozens of long white boxes that are filled with used batteries from electric cars. At ...

CR's experts pick the best portable solar panels and battery chargers to power devices like phones and laptops, plus back-up batteries and power stations.