News Digest Item
22 Jun 2017

Frisian salt caverns to become “world’s largest battery”

Frankfurter Allgemeine Zeitung

Underground salt caverns in the northern German region of Frisia could become the “world’s largest battery”, German energy company EWE AG told Frankfurter Allgemeine Zeitung. EWE plans to use the caverns as large redox flow batteries. Commonly, climate-harmful sulfuric acid in combination with Vanadium is used in these batteries, but EWE plans to use alternatives, Andreas Mihm reports. The batteries would store the region’s sometimes large excess of wind power and could store enough power to supply a large city like Berlin for one day. EWE is currently performing successful small-scale tests above ground and plans to put the caverns to use from 2023.

Read the article (behind paywall) in German here.

For background read the CLEW dossier New technologies for the Energiewende.

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