Last month, Finnish startup Polar Night Energy announced that it is building a giant sand battery capable of heating a town of 5,000 people for up to a month. That’s on a single charge.

Finnish companies Polar Night Energy and Vatajankoski have built the world's first operational "sand battery", which provides a low-cost and low-emissions way to store renewable energy.

The new 1 MW sand battery has a precursor. In May 2022, Polar Night Energy rigged a smaller design to a power station in Kankaanpää town. Launched just as Russia cut off gas supplies in ...

Finland’s Polar Night Energy has secured €7.6 million ($8.2 million) in seed funding. The startup, known for its thermal energy sand-based storage systems, says the investment will be used for ...

Finnish startup Polar Night Energy has announced a new pilot project that will test the next generation of its sand battery technology. The sand battery pilot plant will build on the company’s ...