This Sand Battery Is an  Green Power

Audacious Attempt to Store

Engineers in Finland

May have discovered a cheap and effective way to get the most out of their country's wind and solar power systems.

A Finland Startup Claims to Have

Constructed "the first commercial sand-based energy storage" in the world, and their facility is currently operational.

The Idea Behind the Sand Battery

Is quite simple. Use a large silo of cheap, low-grade sand to store thermal energy created from renewable sources.

This Thermal Energy

Can be made when there is an excess of one type of power — like solar in the middle of summer.

That Thermal Energy Can Then

Be released as needed and used to heat water which is then used to heat homes and public buildings.

The Sand Is Heated

To 500 degrees Celsius, or 932 degrees Fahrenheit, by a process known as resistive heating.

The Battery's Designers Claims

That the sand can hold on to the heat for "several months," which makes it an ideal medium for a thermal battery 

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