On behalf of OMV STRABAG and Siemens Energy are building one of Europe's largest electrolysis plants
29 September 2025
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- The planned 140 MW plant will be the largest in Austria, in South-Eastern Europe and among the five largest in Europe
- Annual production of 23,000 tons of green hydrogen will make a significant contribution to decarbonization of the industrial processes at the OMV refinery in Schwechat
- Innovative partnership with consortium of OMV, Siemens Energy, and STRABAG
OMV is setting another milestone on the road toward a climate-neutral energy future by laying the foundation stone for one of the largest electrolysis plants for green hydrogen in Europe. The 140 MW plant in Bruck an der Leitha is scheduled to go into operation at the end of 2027. OMV will produce up to 23,000 tons of hydrogen annually in future using renewable energy from wind, solar, and hydropower, making a significant contribution toward reducing the company’s carbon emissions.
The new plant will enable the local production of green hydrogen and thus significantly increase the sustainability of the production processes, as well as the fuel and chemical products at the OMV refinery in Schwechat. OMV expects this to result in an annual reduction of up to 150,000 tons of carbon emissions* – i.e., around 10 per cent of the refinery's current direct, production-related emissions.
The new plant will enable the local production of green hydrogen and thus significantly increase the sustainability of the production processes, as well as the fuel and chemical products at the OMV refinery in Schwechat. OMV expects this to result in an annual reduction of up to 150,000 tons of carbon emissions* – i.e., around 10 per cent of the refinery's current direct, production-related emissions.
OMV is investing a sum in the mid-triple-digit millions of euros in the plant. The company will construct a hydrogen pipeline around 22 kilometers long as part of this investment, connecting the electrolysis plant in Bruck an der Leitha directly to the refinery in Schwechat. The operating permit and the building permit have already been granted for this.
The project was assessed positively for funding by the European Hydrogen Bank. The funding agreement is currently being finalized in cooperation with the Austrian promotional bank Austria Wirtschaftsservice GmbH (aws), which acts as the national processing office for the European Hydrogen Bank’s funding program. A contract with the Austrian Hydrogen Bank is expected to be signed by the end of 2025. The plant is scheduled to go into operation at the end of 2027, subject to the funding approval.
The project underlines OMV’s pioneering position in green hydrogen production in the refinery sector in Europe. The company already operates a 10 MW electrolyzer in Austria. The planned large-scale plant in Bruck an der Leitha with an electrolyser size of 140 MW will be the largest of its kind in Austria, in South-Eastern Europe and one of the five largest in Europe.
The project was assessed positively for funding by the European Hydrogen Bank. The funding agreement is currently being finalized in cooperation with the Austrian promotional bank Austria Wirtschaftsservice GmbH (aws), which acts as the national processing office for the European Hydrogen Bank’s funding program. A contract with the Austrian Hydrogen Bank is expected to be signed by the end of 2025. The plant is scheduled to go into operation at the end of 2027, subject to the funding approval.
The project underlines OMV’s pioneering position in green hydrogen production in the refinery sector in Europe. The company already operates a 10 MW electrolyzer in Austria. The planned large-scale plant in Bruck an der Leitha with an electrolyser size of 140 MW will be the largest of its kind in Austria, in South-Eastern Europe and one of the five largest in Europe.
Strong partnerships drive progress
For implementation of this project, OMV is relying on proven partners: Siemens Energy will bring extensive expertise in electrolysis technology and plant construction, while STRABAG will be responsible for the entire civil construction work. The plant will be constructed under an EPC (Engineering, Procurement, Construction) contract, that OMV has awarded to the consortium led by Siemens Energy which is responsible for the complete planning, procurement, and construction of the plant. Siemens Energy will take over the overall technical planning of the plant and will be supplying and implementing key components such as electrolysis stacks, transformers, rectifiers, and compressors, which are used to split water into hydrogen and oxygen using renewable energy.
STRABAG will bring extensive expertise in the planning and construction of industrial infrastructure. In addition to the groundwork, the company will be responsible for constructing all buildings on the site.
