A “sand battery” is a high temperature thermal energy storage that uses sand or sand-like materials as its storage medium. It stores energy in sand as heat.
Polar Night Energy’s sand battery is a large-scale high temperature thermal energy storage that uses sand or sand-like materials as its storage medium. It stores energy in sand as heat.
It has three main purposes: To store excess wind and solar energy, to participate in grid balancing markets, and to produce heat and power without burning.
The sand battery has a lot of potential to save emissions. Cleaner energy production is possible. Together, we can power the change from fossil fuels to renewable energy.
Watch Video on YouTube and See how it works: 
https://www.youtube.com/watch?v=bZ9TyJ1bQ3Y
Polar Night Energy’s site: 