German cavern storage facilities operator Storag Etzel GmbH and EnBW Etzel Speicher GmbH, a unit of electric utility EnBW (<a href="https://www.boerse-frankfurt.de/equity/enbw-energie-baden-wuerttemberg-ag" target="_blank">ETR:EBK</a>), have secured a contract for the construction and operation of new hydrogen storage facilities whose capacity could reach over 1 million cubic meters.