Finnish startup Polar Night Energy is teaming up with a district heating company to construct an industrial-scale thermal energy storage system in southern Finland. The sand-based system will use soapstone, a byproduct from a fireplace manufacturer, as its storage medium.| pv magazine International
Polar Night Energy will build a second pilot plant in southern Finland to test its power-to-heat-to-power sand battery technology. The project aims to demonstrate the system’s ability to reconvert stored heat into electricity.| pv magazine International