Green Hydrogen Electrolyzers

Finding

The world can build 58 GW of electrolyzers a year and has installed about 4 GW

Global electrolyzer factory capacity reached about 58 GW a year at the end of 2025, while installed electrolysis capacity doubled to just over 4 GW (IEA Global Hydrogen Review 2026). Factories ran at about 9% of capacity. China holds 60% of the manufacturing base and accounted for nearly three-quarters of 2025 installations.

The bottleneck is the buyer, not the factory. Green hydrogen costs several times more than hydrogen made from natural gas, so projects need an offtaker willing to pay the gap or a subsidy that covers it. Both weakened in the US: the One Big Beautiful Bill Act moved the 45V clean hydrogen credit's construction deadline from 2033 to January 1, 2028, and the Department of Energy cancelled two of its seven hydrogen hubs in October 2025. The Gulf Coast hub (HyVelocity), centered on Houston's 1,000 miles of hydrogen pipeline, kept its award; see the AustinIO page on the Texas green hydrogen hub.

China is building against the trend, with more than a million metric tons a year of renewable hydrogen capacity completed or under construction by early 2026, mostly in Inner Mongolia, Jilin and the northwest, feeding ammonia, methanol and steel. Its alkaline systems sell for less than half the price of Western ones, and its makers - LONGi, Sungrow, Peric, SANY - are consolidating after a price war. For electrification, an electrolyzer is a large flexible load: it can run when wind and solar are cheap and stop when they are not.

Vendors

Electrolyzer makers

Grouped by technology. Chinese makers dominate alkaline; PEM and solid oxide are led by European and US companies. Active companies first, then pilots, research groups and companies that exited.

Technologies

Four electrolyzer technologies

Related

Related coverage

• Hydrogen DRI for steel
• Hydrogen for ammonia
• Hydrogen for high heat
• Syngas and methanol electrolyzers
• Process Electrification