The Anonymous Widower

Climate Change: ‘Sand Battery’ Could Solve Green Energy’s Big Problem

The title of this post, is the same as that of this article on the BBC.

This is the introductory paragraph.

Finnish researchers have installed the world’s first fully working “sand battery” which can store green power for months at a time.

The article then gives a detailed explanation about how the battery works.


  1. The article does not give any details on battery capacity.
  2. The heat stored in the battery is extracted as hot water.
  3. The Finnish company is called Polar Night Energy.

In Bang Goes My Holiday!, I described the Siemens Gamesa ETES, which appears to work on similar principles, to the Finnish battery.

This document on the Siemens Gamesa web site describes that installation.

  • The nominal power is 30 MW.
  • The storage capacity is 130 MWh.
  • Siemens use volcanic rock as the storage medium.
  • 80 % of the technology is off the shelf.

The picture on the front says “Welcome To The New Stone Age”.

The BBC have published a video of the Polar Night Energy Battery.

July 5, 2022 - Posted by | Energy, Energy Storage | , ,

1 Comment »

  1. Cleantechnica have just run an article on this, which also mentions a similar NREL research project The Gridscale project in Denmark is similar, storing energy in piles of stones. As is Energy Vault, with energy stored in blocks of concrete. I think something like this is promising, as it is low cost, using materials that are widely available.

    Comment by Peter Robins | July 6, 2022 | Reply

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: