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LiveScience
LiveScience
Sophie Berdugo

A scalding hot 'sand battery' is now heating a small Finnish town

Renewable Energy Finland
The Polar Night Energy sand battery with two workers in high visibility vests walking alongside it.

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 giant sandpit encased in a roughly 100 by 40 foot (30 by 12 meter) steel container.

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