this post was submitted on 28 Jul 2026
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Finland builds the world's largest sand battery. Site can cheaply store energy for entire month. No "rare earths" or critical materials used. Estimated at $25/KWh (www.cnbc.com)
submitted 10 hours ago by Lugh@futurology.today to c/futurology@futurology.today
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[–] ThePantser@sh.itjust.works 4 points 9 hours ago

It should only get cheaper with time though. How much degradation can you expect with sand. I do wonder what is the ROI on this kind of thing.