World's First Commercial Sand Battery (Finland)

https://newatlas.com/energy/sand-battery-polar-night/

 

You have created quite a relevant topic. I think most people will find the answer for themselves

 

Hrmmm. So how are they heating the sand to 1000 degrees F?

 

They claim to get the sand hot with excess energy and a heat exchanger.

 

I see. They plan to use all that excessive green energy to heat the sand. Didn't know sand could maintain such a steady thermal constant even in wintertime. In FINLAND. ABOVE THE ARCTIC CIRCLE.