The world’s first sand battery acts as a high-capacity reservoir for excess wind and solar energy. Energy is stored as heat, which can then be transferred for commercial use. Currently, the battery is ...

Polar Night Energy’s heat storage system is a 23-foot-tall steel container filled with 100 tons of sand. (Polar Night Energy uses the lowest grade of sand that isn’t used in construction.) Hot air ...

Batteries are the key to the future of the most abundant sources of renewable energy, solar and wind power for one obvious reason: intermittence. If power generators want to replace fossil fuels ...

Haley Mast is a freelance writer, fact-checker, and small organic farmer in the Columbia River Gorge. She enjoys gardening, reporting on environmental topics, and spending her time outside ...

Finnish startup Polar Night Energy and Loviisan Lämpö, a district heating company in Finland, plan to construct an industrial-scale thermal energy sand-based storage system in the municipality of ...