[michael1999]

A single house is too small to make that work. I can't see how you could insulate such a small volume for more than a few hours. It can start to work at district scale, but the Finns are just targeting a few days.

https://www.euronews.com/green/2024/03/10/sand-batteries-cou...

https://en.wikipedia.org/wiki/Drake_Landing_Solar_Community