Sand Battery Trials Begin In Finland

Sand Battery Trials Begin In Finland

The sand battery is the idea of two Finnish engineers, Markku Ylönen and Tommi Eronen. It is simplicity itself. Make a really big pile of sand. Heat it with excess renewable electricity to around 500º C (932º F), then use that heat later to heat homes, factories, even swimming pools. They say the sand can stay hot for 3 months or more. Together they founded Polar Night Energy, which has completed its first installation — 100 tons of sand inside what looks very much like a silo — in the town of Kankaanpää.