Finland is turning one of the planet’s most ordinary materials into a high impact climate tool, using hot sand to store vast ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The new Polar Night Energy sand battery installed in Pornainen, a small municipality in southern ...

An innovative thermal energy storage system has redefined the way a small Finnish town heats its residential and commercial buildings, with an enormous silo of 2,000 tons of crushed stone capable of ...

Polar Night Energy will deploy an industrial-scale thermal energy storage unit for Lahti Energia’s district heating network in Vääksy, Finland. The sand battery will provide 2 MW of thermal output and ...

A small municipality in southern Finland recently installed the world's largest "sand battery" to supply the town's heating. The new sand battery, designed by Polar Night Energy, is effectively a ...