## Notes 1. Excess electricity heats up a medium 2. That medium heats up "sand" 3. The sand releases heat to town heating system - System is created by [[Loviisan Lämpö]], a Finnish company - [[Polar Night Energy]] ## Reference - [Finnish Giant Sand Battery - Optimist Daily](https://www.optimistdaily.com/2025/06/how-finlands-giant-sand-battery-is-storing-clean-energy-and-cutting-emissions-by-70-percent/) - [[Climate Ideas MOC]]