this post was submitted on 13 Jun 2023
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[–] bstix@feddit.dk 1 points 1 year ago* (last edited 1 year ago)

Yes. The first commercial sand battery in Finland is doing just that. It's connected to the district heating. It doesn't convert back to electricity, but offsets the use of other fuels.

https://polarnightenergy.fi/sand-battery