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 distr

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-could-be-key-breakthrough-in-storing-solar-and-wind-energy-year-round https://www.euronews.com/green/2024/03/10/sand-batteries-cou... https://en.wikipedia.org/wiki/Drake_Landing_Solar_Community https://en.wikipedia.org/wiki/Drake_Landing_Solar_Community