At the site of the STEAG power plant, the project partners produce hydrogen with the help of an electrolyser in times of oversupply of wind and solar energy. This energy carrier is then used in a variety of ways, by linking the electricity and gas networks, industry and transport: the hydrogen is delivered to nearby steel companies, among others, who need it for industrial processes. It is fed into the regional gas grid and also supplies public hydrogen filling stations for fuel cell vehicles in Saarland. Cooperation with the local public transport system is also being considered. In addition, the hydrogen can later be converted back into electricity. The heat generated during the production of the hydrogen is fed into the network of the Saar District Heating Association (FVS).