A Roundup of the World’s Leading Hydrogen Electrolyzer Manufacturers

The top three hydrogen electrolyzer manufacturers in Europe are thyssenkrupp nucera, Siemens Energy, and Nel ASA. thyssenkrupp nucera’s strength lies in its deep engineering expertise in alkaline electrolyzers gained from the chlor-alkali industry. It specializes in 100-megawatt-scale industrial projects and is currently upgrading 3.2 GW of alkaline electrolyzer modules in 2026. Furthermore, its CEO claims that European electrolyzers can outperform Chinese competitors in terms of LCOH due to their superior efficiency and full-lifecycle performance; Its weakness lies in significant financial pressure, with an EBIT loss of 65 million euros in Q2 2026, and orders in its green hydrogen division declining by 21% year-over-year due to project delays. Siemens Energy’s strength lies in the rapid response of its Silyzer PEM technology, which is well-suited for direct coupling with intermittent renewable energy sources such as wind and solar power, and is backed by the Siemens Group’s industrial manufacturing and power system integration capabilities; Its disadvantage is that PEM technology itself relies on precious metal catalysts and perfluorosulfonic acid membranes, resulting in higher material costs than alkaline electrolysers, and it lacks the scale experience in 100-megawatt-class projects that thyssenkrupp nucera possesses. Nel ASA’s advantage lies in offering both PEM and alkaline technology routes, allowing customers to choose flexibly based on load characteristics; its next-generation pressurized alkaline platform, launched in May 2026, claims to reduce project costs by up to 60%. Its disadvantage is a sharp deterioration in financial performance: Q2 2026 revenue fell 12% year-over-year, the order backlog contracted by 24% year-over-year, and management acknowledges that the Chinese supply chain holds a cost advantage.

The top three hydrogen electrolyzer manufacturers in North America are Plug Power, Bloom Energy, and Electric Hydrogen. Plug Power’s strength lies in its PEM electrolyzer revenue surging 343% year-over-year—from $9.2 million in 2025 to $40.8 million in 2026—and its possession of North America’s largest annual production capacity of 2.5 GW; in 2026, it secured a 275 MW contract for the Hy2gen project in Canada; its weakness is that it has yet to achieve a positive gross margin; in Q1 2026, its gross margin was -34.1% and its net margin was -229.8%, with significant risks of continued cash burn and potential equity dilution. Bloom Energy’s strength lies in the extremely high efficiency of its solid oxide electrolyzers, reaching 37.5 kWh/kg, which produce 20–25% more hydrogen per MW than PEM and alkaline electrolyzers; the company is expanding its plant to a 2 GW production capacity in 2026; Its disadvantage is that SOECs must operate at high temperatures (typically 700–900°C), making them highly dependent on heat sources, and their system complexity and maintenance costs are higher than those of room-temperature electrolyzers; the technology remains primarily in the demonstration and early commercialization stages. Electric Hydrogen’s strength lies in its focus on standardized PEM plant solutions at the 100 MW scale and above, with production capacity set to reach 1.2 GW by 2026, directly targeting large-scale decarbonization scenarios in heavy industry; its weakness is that, as a startup founded in 2020, it has a limited track record of project execution, and its long-term reliability and O&M experience in large-scale industrial projects remain to be proven.

The top three hydrogen electrolyzer manufacturers in other regions are HydrogenPro, Toshiba Energy Systems, and H2B2. HydrogenPro’s advantage lies in its manufacturing facility in Tianjin, China, which leverages local Chinese supply chains to reduce the manufacturing costs of alkaline electrolyzers while maintaining its R&D capabilities in Norway; its disadvantage is that its annual production capacity is only 500 MW, which is far lower than that of Plug Power and thyssenkrupp nucera, putting it at a capacity disadvantage in global bids for large-scale projects. Toshiba Energy Systems’ strength lies in its backing by the Toshiba Group’s comprehensive energy system integration capabilities in Japan, enabling it to integrate electrolyzers with power equipment such as gas turbines and energy storage systems; Its disadvantage is that its focus on and market share in the electrolyzer sector are far lower than those of pure-play electrolyzer manufacturers in Europe and the United States, and its product iteration cycle is relatively slow. H2B2’s advantage lies in its deep penetration of the Spanish and Southern European markets, benefiting from EU hydrogen policy support; its disadvantage is a lack of large-scale manufacturing capacity and experience in executing global projects, limiting its market influence to a regional scope.

• thyssenkrupp nucera: Signed a contract in 2026 for the 300 MW Onuba project in Spain to supply 15 standardized scalum® modules, each with a capacity of 20 MW.

• Siemens Energy: Will deliver 12 PEM electrolyzers with a total capacity of 200 MW to Air Liquide’s Normand’Hy project in 2026.

• Nel ASA: Launched a next-generation pressurized alkaline electrolyzer platform in May 2026, with estimated full-scope costs for a 25 MW plant below $1,450/kW.

• Plug Power: Leading the industry with an annual production capacity of 2.5 GW, the company secured a FEED contract in April 2026 for 275 MW of GenEco PEM electrolyzers for the Hy2gen project in Canada.

• Bloom Energy: A 4 MW solid oxide electrolyzer completed validation at NASA Ames Research Center, achieving a system efficiency of 37.5 kWh/kg.

• Electric Hydrogen: The HYPRPlant platform offers configurations ranging from 75 to 120 MW.

Recommended Leading Hydrogen Electrolyzer Manufacturers in North America

Hydrogen electrolyzer manufacturers in North America have distinct advantages in PEM and SOEC technologies. Below are the flagship products of each manufacturer:

Recommended Leading European Hydrogen Electrolyzer Manufacturers

European hydrogen electrolyzer manufacturers have decades of industrial experience in the field of alkaline electrolyzers and continue to innovate in PEM and SOEC technologies:

Recommended Top Hydrogen Electrolyzer Manufacturers in Other Regions