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INNIO and Stadtwerke Kiel to make history with climate-neutral hydrogen cogeneration plant

By 2035, the 190 MW Kiel coastal power plant and its 20 jenbacher units will be the world's first large-scale engine cogeneration plant converted to run on 100% green hydrogen (H2). INNIO and Stadtwerke Kiel signed a corresponding Memorandum of Understanding in early March, setting new global standards for climate-neutral energy provision. It is now incumbent on policymakers to establish the necessary framework for a reliable and economically viable supply of green hydrogen.

  • INNIO and Stadtwerke Kiel to  make history with climate-neutral hydrogen cogeneration plant

The Kiel coastal power plant is the first of its kind that could theoretically be converted to green hydrogen today, and therefore sets new global standards.

Dr. Olaf Berlien, President and CEO, INNIO Group

The coastal power plant on the Kieler Förde inlet was commissioned in 2020. It is one of Europe’s most advanced large-scale engine cogeneration plants, with an overall efficiency of more than 92%. The highly flexible plant supplies more than 73,500 households with climate-friendly district heating while also generating electricity for the region. The transition from the previous coal-fired power plant to this flagship project equipped with 20 large-scale Jenbacher J920 FleXtra engines already has cut annual CO2 emissions by around 70% or 1 million metric tons - equivalent to the carbon emissions of about half a million cars. But more improvements are yet to come.



New standards in supplying climate-neutral energy 

In early March 2023, INNIO and Stadtwerke Kiel signed an agreement to convert the 20 large-scale Jenbacher engines from running on natural gas to green hydrogen. As a result, the flexible, cutting-edge coastal power plant in Kiel will be completely climate neutral beginning in 2035, setting new global standards in supplying green energy. This represents another milestone in Stadtwerke Kiel’s “Eight-Point Program: Route to Climate Neutrality,” the utility company’s roadmap for accelerating the energy transition. The original target was to deliver fully climate-neutral electricity and district heating by 2040 at the latest. This date has now been brought forward by five years.  


Climate change is upon us. We need to act fast, which is why we want our coastal power plant in Kiel to be climate neutral and operating on green hydrogen by 2035.

Dr. Jörg Teupen, Board Member for Technology and Personnel at Stadtwerke Kiel AG

The timeline estimated by INNIO and Stadtwerke Kiel is now 10 years ahead of the German government’s climate targets. A key requirement for keeping to this ambitious schedule is that sufficient green hydrogen must be available in time and on economically viable terms. It is, therefore, now a matter of urgency for policymakers to swiftly and comprehensively implement the national hydrogen strategy adopted by the German government in summer 2020.


MW output

As of 2035

fully climate-neutral


households supplied with green district heating

Jenbacher engines are hydrogen-ready 

The technology for hydrogen-based energy supply is already in place: INNIO’s Jenbacher units are the first hydrogen engines on a MW scale, and the Tyrolean mechanical engineering firm is also among the first to be able to convert most of its installed fleet to run on green hydrogen. In fact, all new Jenbacher units are “Ready for H2,” meaning they can be converted to hydrogen operation in the future. As of 2025, the entire Jenbacher product portfolio is set to be rolled out for operation with 100% hydrogen.  

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