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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 3 months ago by to c/futurology@futurology.today
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[–] 7 points 3 months ago (6 children)

what’s the source for the $25/kWh claim? that’s about 100x more than I was expecting.

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  • [–] 4 points 3 months ago (1 child)

    Probably that not just any sand will do. Similar with building concrete/cement the sand used is important, even desert countries often have it shipped in because desert sand isnt the right type.

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  • [–] 2 points 3 months ago

    Yeah the article doesn't actually say that at all. That appears to be pulled straight out of OP's ass.

    However, if that's the installed cost, and per kW, then that's insanely cheap. Solar where I am is about $2500 per kW capacity installed. $25 per kW would be dirt cheap.

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