KK Wind Solutions signs framework agreement with Stiesdal Hydrogen for groundbreaking plant concept

The company has already delivered several Power Supply Units and Electrolyser Control Systems to Stiesdal Hydrogen, and framework agreements are in place to supply similar modules for future turnkey hydrogen plant concepts.

Projects typically start at around 12.4 MW, based on standardized 3.1 MW electrolyser modules, and can be expanded stepwise to larger capacities, enabling flexible scaling of green hydrogen production.

The electrolyser control system will be tailored to Stiesdal Hydrogen’s exact site specifications, ensuring stable and efficient operation of the electrolysis process by managing dynamic renewable inputs and delivering reliable power to the electrolyser stacks. This will result in the electrolyser producing green hydrogen at maximum efficiency while reducing operating costs. Stiesdal Hydrogen’s new plant concept targets capital expenditure (CAPEX) below EUR 1,000 per kilowatt, a significant reduction compared to current market prices.

The agreement also benefits from state-of-the-art thermal management technologies from Nissens Cooling Solutions — now part of KK Wind Solutions. Together, these integrated systems secure optimal performance, efficiency, and safety under highly demanding operational conditions.

“By combining the PSU and Electrolyser Control System and harvesting the synergies from the cooling technologies acquired through Nissens Cooling Solutions, we are uniquely positioned to provide comprehensive power electronic and thermal management solutions for the green hydrogen sector,” said Michael Ariel Nielsen, VP of Business Development at KK Wind Solutions.

“This framework agreement demonstrates how our combined expertise enables stable and efficient hydrogen production, supporting the transition to a sustainable energy future. Thank you to Stiesdal Hydrogen for your continued partnership and innovation in driving forward this important industry.”

A strong partnership

KK Wind Solutions and Stiesdal Hydrogen have worked together since 2021 to develop new power conversion and control technology for the growing green hydrogen industry. The companies developed a prototype solution and, in 2023, successfully produced the first kilogram of green hydrogen at a project in Denmark.

By combining advanced renewable power conversion with next-generation cooling technologies, this partnership represents a critical step toward scaling affordable green hydrogen production in Europe.

About Stiesdal Hydrogen

• Stiesdal Hydrogen delivers electrolysers and a proven concept for fully integrated, turnkey hydrogen plants that combine maximum efficiency with scalability.
• The company’s standardised, pressurized alkaline Electrolyser and Hydrogen Block system enables rapid deployment and reliable, cost-competitive production of green hydrogen.

About KK Wind Solutions

• KK Wind Solutions is a EUR 1 billion revenue company with more than 3,700 colleagues in 10 countries. Through its core business of delivering power converters and controls for wind turbines, the company has become an industry leader in integrated electrical systems, supporting the renewable energy transformation. With a strong long-term owner in A.P. Moller Holding, KK Wind Solutions is well positioned to deliver on future growth ambitions.
• Leveraging more than 25 years of power conversion expertise, KK Wind Solutions is uniquely positioned to support sectors transitioning to electrification — most notably through the emerging green hydrogen market.
• We design and manufacture integrated power supply units that efficiently convert alternating current (AC) from the electricity grid into direct current (DC) to power electrolysers, which convert water into green hydrogen. KK Wind Solutions has delivered over 30,000 power conversion systems to the wind sector, with an annual production capacity exceeding 15 GW. This proven industrial track record underpins our ability to scale reliable and cost-efficient solutions for the green hydrogen industry.