Nordex Electrolyzers is a joint venture between Nordex Group and the public development company Sodena, based in Navarre, dedicated to the design, manufacture, operation, and commercialization of pressurized alkaline electrolyzers for the production of green hydrogen from renewable energy. Its objective is to bring to market a megawatt-scale electrolyzer designed and manufactured in Spain.
Several companies within the Nordex Group have received support through different funding programs under Spain’s Recovery, Transformation and Resilience Plan, linked to the energy transition and renewable hydrogen, within the framework of the Renewable Energy, Renewable Hydrogen and Storage Strategic Project (PERTE ERHA).
The largest grant amounts to €12 million and was awarded under the Important Project of Common European Interest (IPCEI Hy2Tech). The funding supports the development of a megawatt-scale pressurized alkaline electrolyzer capable of adapting to variable operation with direct electricity supply from wind turbines and photovoltaic plants, while reducing the cost of green hydrogen production.
The project is financed through the Recovery and Resilience Facility – NextGenerationEU and includes the establishment of a manufacturing line in Navarre as well as the upgrading of testing laboratories in Puertollano (Ciudad Real).
What is Nordex Electrolyzers and What Does It Do?
Nordex Electrolyzers was founded in 2022 as a joint venture between Nordex Group—one of the world’s leading wind turbine manufacturers—and Sodena, the development agency of the Government of Navarre, which joined the company’s shareholding structure in early 2023 with a 15% stake.
The company combines expertise in electrochemistry with the industrial-scale manufacturing capabilities of the Nordex Group and operates facilities in both Navarre and Puertollano (Ciudad Real).
Its activities focus on pressurized alkaline electrolysis, a process that uses electricity to split water molecules into hydrogen and oxygen within a pressurized system. When the electricity comes from renewable sources, the resulting hydrogen is considered “green,” meaning it is produced without CO₂ emissions.
The company has progressively increased the scale and capacity of its electrolyzers, starting with a 50 kW stack in 2023, followed by a 500 kW electrolyzer in 2024. In 2025, it launched the NX2500, a 2.5 MW system that represents its first industrial-scale electrolyzer available on the market.
Nordex Electrolyzers is currently developing the NX5000 and NX10000 multistack modules, with capacities of 5 MW and 10 MW respectively, which will complete its product portfolio. The ultimate goal is to offer a range of standardized, serially manufactured megawatt-scale electrolyzers capable of meeting the growing demands of the renewable hydrogen market.
An Electrolyzer Designed to Lower the Cost of Green Hydrogen (IPCEI Hy2Tech)
The project supported through IPCEI Hy2Tech aims to design and manufacture a pressurized alkaline electrolyzer featuring a stack with a capacity of between 5 MW and 10 MW. The system is intended to operate directly alongside wind farms, solar plants, or a combination of both, without requiring support from the electrical grid.
The primary technical objective is to minimize the Levelized Cost of Hydrogen (LCOH), which measures the total cost of producing each kilogram of hydrogen over the lifetime of the installation. This will be achieved by increasing efficiency—reducing the amount of electricity required to produce one kilogram of hydrogen—through a design based on fluid dynamics optimization, advanced electrode engineering, and enhanced temperature and pressure management.
A key challenge is adapting the system to a variable electricity supply. Wind and solar facilities do not generate constant power, as output depends on weather conditions. To address this, Nordex is redesigning both the electrolyzer stack and the Balance of Plant (BOP)—the auxiliary systems surrounding the electrolyzer—so the equipment can withstand frequent start-ups, shutdowns, and power fluctuations between 25% and 110% of its nominal capacity without sacrificing efficiency, while ensuring an operational lifetime of 80,000 hours.
The system uses a 30% potassium hydroxide (KOH) electrolyte solution operating at a temperature of 80°C.
For this project, the company has received €12 million in funding against a total project budget of €45.11 million, granted through IDAE under the PERTE ERHA framework of Spain’s Recovery Plan.
Renewable Hydrogen Value Chain Projects
In addition to the IPCEI Hy2Tech initiative, Nordex Electrolyzers has been selected in two other Recovery Plan funding calls.
Under the Hydrogen Value Chain program, Nordex participates in the ELEKWIND consortium, a project focused on the manufacture and validation of advanced electrodes for alkaline electrolysis powered by wind energy in Castilla-La Mancha. The consortium has a total eligible budget of €3.42 million and has received €1.62 million in public funding. The project falls under Incentive Program 1 of the renewable hydrogen value chain, managed by IDAE.
Furthermore, within the RENOVAL 2 program, Nordex Electrolyzers has been awarded provisional funding of €1.1 million aimed at strengthening the industrial value chain for clean technologies. Specifically, the funding will support the development and installation of automated assembly lines for electrolyzer manufacturing.
A Project Focused on the Future
Nordex Electrolyzers’ long-term goal is to develop a competitive, reliable, and serially manufactured megawatt-scale electrolyzer aligned with the objectives established under IPCEI Hy2Tech.
The technology is expected to contribute to Spain’s Hydrogen Roadmap and the National Integrated Energy and Climate Plan (PNIEC), which, in its latest update, increased the country’s electrolysis capacity target to 11 GW by 2030.
Nordex Electrolyzers’ projects exemplify the role assigned to renewable hydrogen within Spain’s Recovery Plan: developing strategic technology in Spain, closely integrated with wind and solar power generation, to support the decarbonization of industry and heavy transport while strengthening Europe’s industrial base and energy autonomy.
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