Green hydrogen production
Discover our electrolyzer and large-scale hydrogen solutions for sustainable energy systemsBenefits of green hydrogen
Green hydrogen (H2) is a versatile energy carrier that can be applied to decarbonize a wide range of sectors. It can be used directly or in the form of its derivatives like e-methanol, e-ammonia, or e-fuels to replace fossil fuels, coal or gas.
Only around 40% of global carbon dioxide (CO2) emissions originate from power generation which can be decarbonized via electrification. The other 60% of CO2 emissions originate from industry, mobility, buildings and others. These can be decarbonized via sector coupling, using green hydrogen and its derivatives to make renewable energy available to those sectors. This is why the production of sustainable hydrogen is such a crucial issue.
Our electrolyzer portfolio: The optimum solution for large-scale sustainable hydrogen production
Generating green hydrogen efficiently from water and renewable energy requires high-end technology and innovative solutions — like the Silyzer product family from Siemens Energy. Using Proton Exchange Membrane (PEM) electrolysis, the Silyzer is ideally suited for harnessing volatile energy generated from wind and solar. Combining high efficiency and high power density, our PEM electrolyzers ensure gas products of superior quality. It is easy to operate and requires low maintenance. Using a modular design strategy that splits the electrolysis system into skids, we are able to optimize costs, reduce installation costs, and make the electrolysis system transportable.
The heart of the PEM electrolyzer, stacks combined in groups. Prefabricated for modular and fast installation on site. The Trailblazer project with our electrolyzer core system.
Grid integration and safety first are in our DNA. Transformers and in-house developed rectifier configurations are part of our scope. Upscaling to a higher power level is demonstrated in the 50 MW reference plant as shown in the picture.
With our longstanding experience in the energy industry, we ensure the smooth implementation of large-scale projects and provide comprehensive electrolysis plant services. The modular design of our electrolyzer core system facilitates the design of larger plants up to gigawatt capacity.
Scaling up the capacity of green hydrogen production
Carbon emission targets in the European Union and other industrialized countries will require massive scaling-up and acceleration of renewable hydrogen production and imports – already 20 million tons will be needed in Europe by 2030 to fast forward the energy transition and decarbonization.
That’s why we have joined forces with Air Liquide to create a joint venture dedicated to the series production of industrial-scale renewable hydrogen electrolyzers. In 2023, we started production of electrolysis stacks at our multi-gigawatt electrolyzer facility in Berlin and will ramp up to an annual production capacity of three gigawatts by 2025. The factory will supply stacks to Siemens Energy and Air Liquide for our broad range of customers and serve the rapidly growing market.
The new gigawatt electrolyzer plant in Berlin is highly automated with robotics and digitalization.
Your service partner for green hydrogen production and beyond
Siemens Energy can offer comprehensive services for your electrolyzer plant and energy assets along the entire hydrogen value chain. Our service agreements range from basic maintenance to premium service with state-of-the-art data analysis and can be customized to your needs.
Our combined package of maintenance, support and digital services can ensure reliable and economical operation. You can reduce your risks with our performance guarantees or enjoy total peace of mind with our Operations and Maintenance service program. Together, we will push your clean hydrogen production to the next level.
Our system in the field
Normand'Hy | France
Delivering 12 electrolyzers to Normandy
- Starting in 2026, Air Liquide’s plant in the Port-Jérôme industrial zone will produce 28,000 tons of renewable hydrogen
- 250,000 tones less CO2 per year thanks to 200 MW electrolyzers
- Industrial-scale hydrogen electrolyzer plant to decarbonize industry and mobility
FlagshipONE | Sweden
Blueprint for eFuel production
- Europe's biggest commercial production facility for carbon-neutral marine fuels is being built by the Danish company Ørsted
- At the center of the FlagshipONE plant is a technology package from Siemens Energy with 70 MW electrolyzer capacity
- The plant will be able to generate up to 50,000 metric tons of e-methanol for shipping annually
Hy4Chem-EI | Germany
Hydrogen for the chemical industry
- 54 MW PEM-electrolyzer for BASF's Ludwigshafen site from 2025
- BASF will predominantly use the produced hydrogen as a raw material for manufacturing products
- Annual reduction in CO2-emissions of up to 72,000 metric tons
Kassø | Denmark
Large-scale e-Methanol project
- Starting point into CO2-neutral shipping in large-scale: End users of the e-Methanol will be the shipping company Maersk and the fuel retailer
Circle K among others. - Siemens Energy will implement an electrolyzer plant in the 50 MW range
- European Energy will be responsible for utilizing the electrolyzer in Aabenraa in the Southern part of Denmark
Trailblazer | Germany
Air Liquide to build 20 MW electrolyzer
- Germany's largest electrolyzer connected to an existing hydrogen infrastructure
- Is being developed in Oberhausen within the framwork of the large scale electrolyzer partnership between Air Liquide and Siemens Energy
- Cooperation between Air Liquide and Siemens Energy for European ecosytem for electrolysis and hydrogen technology
Haru Oni | Chile
Fuel from wind and water
- December 2022, first low-carbon fuel has been produced at the integrated and commercial large-scale Power-to-X plant
- Siemens Energy develops and implements this pioneering project alongside several international companies
- The system is expected to produce 130,000 liters of eFuel per year in 2023, followed by a projected 55 million liters by mid-decade and a expected 550 million liters per year two years later
H2Future | Austria
Green hydrogen for steel
- World's first PEM electrolysis facility Silyzer 300 producing 1.200 Nm³ of green hydrogen per hour with 6 MW power demand and a high electrolysis system efficiency of 80%
- Hydrogen for the steel making process: Potential for "breakthrough" steelmaking technologies which replace carbon by green hydrogen as basis for further upscaling to industrial dimensions
- Supply grid services via a highly dynamic power consumption
Your partner for sustainable hydrogen production
With our extensive knowledge of industrial, mobility, and energy sectors, we’re able to provide dependable solutions for our customers in every aspect of green hydrogen production.
You will benefit from Siemens Energy’s decades of experience, global footprint, infrastructure, strong partnerships and manpower available, covering the full energy value chain from renewable power via transmission to hydrogen and Power-to-X production. Moreover, we can help you certify the source of green energy with Clean Energy Certificates.
Are you ready for the green hydrogen economy? We are and we look forward to being your partner for sustainable hydrogen generation.
Good to know
Download Siemens Energy's technical papers and benefit from our expertise.
Power-to-X: On the way to a carbon-free world
The white paper provides an overview of use cases and solution packages for industries, utilities and project developer. Learn more about Power-to-X:
Power-to-X: A closer look at e-Ammonia
Find out more about the economic feasibility, key markets and applications of e-Ammonia around the world in connection with Power-to-X:
e-Methanol: A universal green fuel
In the future, non-fossil e-Methanol will see vast new application fields. This paper focuses on the green hydrogen path, which uses renewable electricity. Learn more:
FAQ – The most common questions on hydrogen
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