Bavaria’s largest electrolysis plant in Wunsiedel
The WUN H2 GmbH was founded in 2021 as a joint venture by Rießner-Gase GmbH, Siemens Project Ventures GmbH and Stadtwerke Wunsiedel. The aim was to plan, build and operate Bavaria’s largest energy storage facility. At the time of commissioning in September 2022, the plant was one of the largest in Germany and Europe. The plant has a nominal output of 9 MW and produces around 175 kilograms of hydrogen per hour. This means that an annual production of up to 1,350 tons of green hydrogen can be achieved. The hydrogen supplied has a purity of up to 99 percent. Compressed to up to 500 bar, it is then stored in tanks on site.
In the plant, water is split into hydrogen and compressed in a PEM electrolysis process using electricity from solar panels and wind turbines. The PEM hydrogen generation plant converts the available renewable energy into a storable medium and makes it available for various applications in mobility and industry. This enables the efficient coupling of the individual sectors.