Forward-looking: A Finnish startup has secured $7.6 million Euro ($8.2 million) in seed funding to scale up its unique sand battery technology. The money will be used to grow the company's sales and R ...

Finland is turning one of the planet’s most ordinary materials into a high impact climate tool, using hot sand to store vast amounts of energy and release it as heat when homes and factories need it ...

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. Polar Night is ...

A small town in Finland is about to ditch fossil fuels in its heating network thanks to a sand-filled energy storage tank the size of a house. Finnish startup Polar Night Energy recently turned on the ...

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 ...

Imagine walking into a double-brick house on a scorching 40°C summer day – it feels cool almost straight away. Now imagine stepping into a corrugated tin shed – it feels like an oven. The difference ...