this post was submitted on 17 Jun 2025
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Finland warms up the world’s largest sand battery, and the economics look appealing (techcrunch.com)
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[–] Olgratin_Magmatoe@slrpnk.net 27 points 1 month ago* (last edited 1 month ago) (1 children)

it’s hard to get any cheaper than the crushed soapstone now housed inside an insulated silo in the small town of Pornainen. The soapstone was basically trash — discarded from a Finnish fireplace maker.

Hell yeah. I'm glad that this works with that kind of sand, and is being done without the kind we're running out of.