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)

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.