Siemens has commissioned one of Germany’s largest green hydrogen generation plants, it has been announced.

Siemens said that the hydrogen generation plant has an electrical capacity of 8.75 megawatts. Located in Wunsiedel, Upper Franconia, it is one of Germany's largest green hydrogen generation plants. It has been planned digitally and commissioned by Siemens, demonstrating the key role hydrogen can play in the country’s energy future.

Renewable energy and hydrogen power in Germany 

Coming one year after the official ground-breaking ceremony, Bavaria’s Minister-President Markus Söder, Siemens Managing Board member Matthias Rebellius and Siemens Financial Services CEO Veronika Bienert handed over the plant to the operating company WUN H2, represented by Managing Directors Thilo Rießner and Philipp Matthes, the statement added.

Up to 1,350 tonnes of green hydrogen can now be generated annually from renewable solar and wind power in the Wunsiedel Energy Park. The hydrogen will be used primarily in the region’s industrial and commercial enterprises, but also in road transport. 

With this amount of hydrogen, 400 40-tonne hydrogen-powered trucks could – assuming a regional distance of 150kms per day – drive for an entire year without emitting any CO2. By using the hydrogen generated in Wunsiedel and the related replacement of fossil fuels, annual CO2 emissions can be cut by up to 13,500 tonnes, the company said.

The hydrogen is generated by an electrolyser – with a total capacity of 8.75 megawatts – from Siemens Energy. The Silyzer 300 is based on proton exchange membrane (PEM) technology, which is optimally suited for operation with renewable energies. 

A carbon-free power supply of renewable energy

Siemens Smart Infrastructure was the general contractor for the project and was responsible for the construction of the hydrogen plant and the creation of an intelligently monitored and controlled power grid. 

“With global warming, energy dependency and rising costs becoming increasingly pressing issues, real-world solutions for the future of energy are crucial,” said Matthias Rebellius, Member of the Managing Board of Siemens AG and CEO of Smart Infrastructure. 

“The Wunsiedel project is an excellent demonstration of how vision and initiative combined with the right technology and financing can drive forward the development of a carbon-free power supply.”

Siemens Financial Services has supported the project with an intelligent financing concept. It holds a 45% stake in the operating company WUN H2. Rießner-Gase, located in Lichtenfels also holds a 45% stake and the utility company Stadtwerke Wunsiedel (SWW) the remaining 10%. 

“Future-oriented projects need a solid financing basis,” said Veronika Bienert, CEO of Siemens Financial Services, the financing arm of Siemens AG. “In Wunsiedel, we teamed up with an external lender, the UmweltBank in Nuremberg, to implement the first non-recourse project financing – in other words, financing without counter-liability to the shareholders – for such a plant in Germany and thus demonstrate the project’s economic feasibility.”

The customer for green hydrogen is the regional business community – encompassing everything from the glass and ceramics industry to transport companies, automotive suppliers, and the neighbouring sawmill. The hydrogen will be distributed by truck trailers on a decentralised basis to end customers mainly within a radius of around 150 to 200kms (Northern Bavaria, Thuringia, Southern Saxony and Western Bohemia). 

In addition, following the construction of an H2 filling station at the Wunsiedel Energy Park, scheduled for completion in 2023, the regional fleet of commercial vehicles can be decarbonised, the statement said.

In Wunsiedel, the energy used by the community of 10,000 is 100% climate neutral. Wunsiedel also generates its own electricity and heating. The hydrogen generation plant will be linked to Siemens’ existing battery storage facility and with neighbouring industrial enterprises, which can use – for example – its waste heat or the oxygen split off during electrolysis.

Hydrogen also plays a major role in Germany’s decarbonisation strategy to make transportation, steel production and the chemical industry carbon-neutral, since it can be used to implement many processes previously dependent on fossil fuels, without releasing CO2 in the reconversion into energy. Hydrogen is also an important storage provider for renewable energies. By 2030, 10m tonnes of green hydrogen are to be generated annually in the European Union alone.

With the commissioning of the hydrogen generation plant, the commercial production of the energy source H2 in Wunsiedel will begin. Talks regarding the expansion of the plant’s capacity to 17.5 megawatts are already underway, the statement concluded.