The HPC (Hydrogen Pilot Cavern) Krummhörn project aims to test the construction and operation of a 100% hydrogen storage facility under real conditions. During the test operation, we check equipment, materials and substances for H2 compatibility and gather experience regarding technology and operation in the storage of hydrogen. For this purpose, we are using our salt cavern storage facility in Krummhörn in northern Germany, which has not been used commercially since 2017. The demonstration plant was inaugurated in 2024.  

The Salinae Hydrogen Storage project is a potential salt cavern hydrogen storage development in Cheshire, in the UK. The site has the potential to store up to 400 GWh of hydrogen, across up to 13 caverns. This could help to provide confidence for industries looking to fuel switch to hydrogen and away from fossil fuels, by providing a reliable source of hydrogen, complementing other sources. Uniper is working on the Salinae Hydrogen Storage project with British Salt who own the mineral rights and whose existing operations are on the site.

The project intends to expand one of Uniper's largest natural gas storage facilities in Epe, Westphalia, for commercial underground hydrogen storage. 

The European Commission has included the hydrogen storage project UST Hydrogen Storage Epe in the list of “Projects of Common Interest” (PCI). In its initial development phase, the project foresees two salt caverns with an H₂ working gas capacity of around 200 GWh for 100% hydrogen by the end of the 2030s. This project will strengthen regional resilience in North Rhine-Westphalia and provide both seasonal and short-term flexibility for industrial consumers in the region and across Europe.