Denmark's largest battery - one step closer to storing green power in stones
E-Mail IMAGE: When there is a surplus of electricity from wind or solar, the energy storage is charged. This is done by a system of compressors and turbines pumping heat energy from... view more Credit: Claus Rye, Stiesdal Storage Technologies. Pea sized stones heated to 600?C in large, insulated steel tanks are at the heart of a new innovation project aiming to make a breakthrough in the storage of intermittent wind and solar electricity. The technology, which stores electrical energy as heat in stones, is called GridScale, and could become a cheap and efficient alternative to st...