Under the collaboration, Hystar will supply its proprietary PEM electrolyzer technology, while McDermott will contribute its engineering, procurement, and construction expertise to develop a full-facility plant design.
The companies aim to combine Hystar’s high-efficiency and high-safety PEM electrolyzers with McDermott’s experience delivering large-scale energy infrastructure projects. McDermott has previously executed pre-FEED, FEED, and EPC work for hydrogen and low-carbon facilities, including hydrogen, ammonia, and modularized energy projects.
Through the collaboration, the partners will develop a 100 MW reference plant intended to function as a standardized blueprint for future commercial green hydrogen facilities. The design is expected to be optimized for scalability, flexibility, safety, and cost efficiency, supporting faster project development and simplified delivery.
The reference plant is positioned to support hydrogen demand from sectors including refining, ammonia production, steelmaking, heavy transport, and synthetic fuels. By providing an integrated plant architecture, the collaboration seeks to reduce technical risk, streamline procurement, and shorten time to market for project developers.
“This collaboration reflects our shared commitment to advancing the energy transition,” said Rob Shaul, Senior Vice President of Low Carbon Solutions at McDermott. “By combining McDermott’s engineering and EPC expertise with Hystar’s innovative PEM technology, we’re creating a scalable solution to support future green hydrogen projects.”
Fredrik Mowill, Chief Executive Officer of Hystar, said: “Working with McDermott ensures that Hystar’s leading PEM technology can be scaled efficiently and deployed worldwide through a proven EPCI framework.”



