Grid-Scale Green Hydrogen Projects, Top 10, 350, 000 Tonnes Ever Wind & 4 GW ACWA Power (2024 to 2026)

The global green hydrogen market is rapidly scaling from pilot programs to commercially viable, grid-scale operations. Driven by significant capital investment and national decarbonization strategies, a new class of megaprojects is emerging, defined by hundreds of megawatts in electrolyzer capacity and production targets exceeding 20, 000 tonnes annually. Milestones achieved between 2024 and 2026 demonstrate a clear shift towards execution, with projects like Ever Wind Fuels’ 350, 000-tonne facility in Canada and the 4 GW renewable-powered NEOM complex in Saudi Arabia setting new benchmarks for the industry. The dominant theme for 2025 and 2026 is the operationalization of these massive facilities, with a focus on producing green ammonia for export and replacing grey hydrogen in industrial applications.

1. Point Tupper Green Hydrogen/Ammonia Project

• Key Companies: Ever Wind Fuels
• Annual Production: 350, 000 tonnes/year
• Application: Green ammonia production for export
• Details: With a projected operational start in 2026, this GW-scale project in Nova Scotia is positioned to become one of North America’s largest green hydrogen production facilities, converting the output into green ammonia for international markets.
• Source: CER – Provincial and Territorial Energy Profiles – Nova Scotia

2. NEOM Green Hydrogen Complex

• Key Companies: NEOM Green Hydrogen Company (NGHC), Air Products, ACWA Power
• Annual Production: 219, 000 tonnes/year
• Application: Green ammonia for global export
• Details: Powered by 4 GW of dedicated wind and solar energy, the world’s largest utility-scale green hydrogen plant reached 80% construction completion in early 2025. It is designed to produce 600 metric tons of hydrogen per day upon its commissioning in 2026.
• Source: World’s Largest Green Hydrogen Plant Reaches 80% Construction …

3. Onuba Green Hydrogen Project

• Key Companies: Moeve, thyssenkrupp nucera
• Annual Production: 45, 000 tonnes/year
• Application: Industrial decarbonization
• Details: Slated for operation in 2026, the Onuba project in Huelva, Spain, will feature a 300 MW electrolyzer capacity from thyssenkrupp nucera. It aims to produce 45, 000 tons of green hydrogen annually, abating approximately 250, 000 tons of CO 2 per year.
• Source: thyssenkrupp nucera Supplies Electrolyzers for Moeve to Build …

4. Inner Mongolia Pure-Hydrogen Power Project

• Key Companies: Not specified
• Annual Production: ~37, 600 tonnes/year
• Application: Integrated power generation and hydrogen production
• Details: Construction on this major Chinese project began in August 2025. It integrates 500 MW of wind and 5 MW of solar to power 240 MW of electrolyzers, creating a self-contained system for green hydrogen production.
• Source: China Builds World’s Largest Pure-Hydrogen Power Project

5. Lancaster Clean Energy Center

• Key Companies: Element Resources
• Annual Production: 22, 000 tons/year (approx. 20, 000 metric tons)
• Application: Clean fuel for transportation and industry
• Details: With a planned 2025 operational date and a $1.85 billion investment, this solar-powered facility in California is set to become North America’s largest green hydrogen plant by production volume, producing 22, 000 tons annually.
• Source: Element Resources to Build America’s Largest $1.85 B Green …

6. Xinjiang Green Hydrogen Plant

• Key Companies: Sinopec
• Annual Production: 20, 000 tonnes/year
• Application: Refinery feedstock
• Details: Sinopec’s flagship project, featuring 260 MW of electrolyzer capacity, reached full operational status in July 2026. The plant is designed to produce 20, 000 tonnes of green hydrogen annually to supply the company’s nearby refining operations.
• Source: China’s Flagship Green Hydrogen Project Reaches Full Operating …

7. Petronor Green Hydrogen Project (Phase II)

• Key Companies: Repsol, Petronor
• Annual Production: 15, 000 tonnes/year
• Application: Refinery feedstock and synthetic fuels
• Details: As part of a €292 million investment, Repsol is installing its second 100 MW electrolyzer at the Petronor complex in Bilbao, Spain. Scheduled for installation in 2026, this unit will produce up to 15, 000 tons of renewable hydrogen per year.
• Source: Repsol Installs Second 100 MW Green Hydrogen Electrolyzer

8. Galp Sines Refinery Project

• Key Companies: Galp, Plug Power
• Annual Production: 15, 000 tonnes/year
• Application: Refinery feedstock
• Details: Plug Power delivered the first electrolyzer for this 100 MW project in Sines, Portugal, in October 2025. Once fully operational, the plant will produce up to 15, 000 tons of green hydrogen annually, replacing 20% of the grey hydrogen currently consumed by the refinery.
• Source: Plug Power Delivers First Electrolyzer for 100 MW Green Hydrogen …

9. Holland Hydrogen 1

• Key Companies: Shell
• Electrolyzer Capacity: 200 MW
• Application: Industrial decarbonization
• Details: Described as Europe’s first major renewable hydrogen plant, Shell’s Holland Hydrogen 1 features a 200 MW capacity. A critical milestone was achieved in September 2024 when the facility was connected to the high-voltage grid, paving the way for operations.
• Source: First large-scale hydrogen plant on the high-voltage grid

10. Hamburg Green Hydrogen Hub (HGHH)

• Key Companies: HGHH project company
• Electrolyzer Capacity: 100 MW
• Application: Industrial feedstock
• Details: Announced in September 2024, the HGHH project will construct a 100 MW electrolyzer on the site of a former coal-fired power plant in Hamburg, Germany, marking a strategic transition of existing energy infrastructure towards a green hydrogen economy.
• Source: HGHH – Hamburg Green Hydrogen Hub

Table: Top 10 Grid-Scale Green Hydrogen Projects by Announced Production Capacity (2024-2026)

Green Hydrogen Applications, 219, 000 Tonnes for Export & Industrial Feedstock Use

The applications for large-scale green hydrogen production are concentrating in two primary areas: conversion to green ammonia for export and direct use as an industrial feedstock to decarbonize existing processes. This dual focus indicates a maturing market strategy aimed at both creating new value chains and addressing emissions in hard-to-abate sectors.

Green Ammonia for Global Export

The largest projects, such as NEOM in Saudi Arabia (219, 000 tonnes/year) and Point Tupper in Canada (350, 000 tonnes/year), are designed explicitly for the export market by converting hydrogen into green ammonia. Ammonia is significantly easier and more cost-effective to transport over long distances than pure hydrogen, making it the preferred carrier for serving international energy demand in markets like Europe and Asia. This strategy positions these projects as foundational elements of a future global hydrogen trade network.

Refinery and Industrial Decarbonization

A significant number of projects are co-located with or dedicated to supplying industrial facilities, particularly oil refineries. The Galp Sines project in Portugal, Repsol’s Petronor project in Spain, and Sinopec’s Xinjiang plant in China are all designed to replace carbon-intensive grey hydrogen (produced from natural gas) with green hydrogen. This application provides a clear business case with a built-in offtaker, reducing market risk and directly contributing to the decarbonization of existing industrial assets.

Europe & Middle East Lead, 4 GW NEOM Project Sets Global Scale

Geographically, the development of grid-scale green hydrogen is concentrated in regions with strong renewable energy resources, robust policy support, and strategic access to industrial demand centers or export terminals. Europe, the Middle East, and China are emerging as the dominant players, each with a distinct strategic focus driving their respective project pipelines.

Spain’s Hydrogen Valley Momentum

Spain is solidifying its position as a key European hydrogen hub, with projects like Onuba (300 MW) in Huelva and Petronor (100 MW) in Bilbao. These facilities are part of a broader “Hydrogen Valley” strategy, which leverages the country’s abundant solar resources and existing industrial infrastructure to create integrated ecosystems for production, distribution, and consumption. This regional clustering helps optimize costs and accelerates sector coupling.

Saudi Arabia and Canada’s Export Ambitions

Nations with vast renewable potential are pursuing mega-projects aimed at global exports. Saudi Arabia’s NEOM project, powered by 4 GW of wind and solar, is the clearest example of this ambition. Similarly, Canada’s Point Tupper project leverages the country’s renewable resources and coastal access to target the production of green ammonia for shipment to international markets, signaling a strategy to become a major clean energy supplier.

China’s Domestic Consumption Focus

China is developing massive green hydrogen projects, such as the Inner Mongolia (240 MW) and Xinjiang (260 MW) plants, primarily to serve its vast domestic industrial and energy needs. Unlike the export-oriented models of the Middle East and North America, China’s strategy appears focused on using green hydrogen to decarbonize its internal economy, from chemical production to steel manufacturing, and enhance its energy security.

300 MW Electrolyzers, Thyssenkrupp & Plug Power Drive Commercialization

The successful execution of these top-tier projects signals growing confidence in the commercial readiness of large-scale electrolyzer technologies. As projects move from planning to construction and operation, the industry is demonstrating its ability to deploy systems at the 100 MW to 300 MW scale and beyond, a critical step towards achieving cost-competitive green hydrogen production.

Scaling Alkaline and PEM Electrolyzers

These projects utilize both established alkaline electrolyzer technology and advanced Proton Exchange Membrane (PEM) systems, supplied by leading manufacturers like thyssenkrupp nucera (Onuba project) and Plug Power (Galp Sines project). The deployment of multiple 100+ MW blocks, as seen with Sinopec’s 52 alkaline units in Xinjiang, proves the modular scalability of the technology. This progress is essential for building the manufacturing capacity needed to meet future gigawatt-scale demand.

Repurposing Fossil Fuel Infrastructure

A key trend is the strategic repurposing of brownfield sites, particularly former fossil fuel power plants. The Hamburg Green Hydrogen Hub is being developed on the site of a retired coal plant, and Repsol’s investment is expanding hydrogen capabilities at an existing industrial complex. This approach offers significant advantages, including access to grid connections, water supplies, and established transport logistics, thereby reducing project costs and development timelines while facilitating a just transition for local economies.

Green Hydrogen Scenario, Offtake Certainty and Cost Reduction for 2026 Viability

The critical path to success for green hydrogen projects through 2026 hinges on securing long-term offtake agreements to de-risk massive capital outlays. As projects of this scale require billions in investment, certainty of demand is paramount to achieving a final investment decision and attracting the necessary financing. The high production costs relative to conventional hydrogen mean that project viability remains closely tied to both technological learning curves and supportive government policy.

• If projects continue to secure multi-billion dollar financing packages, as seen with the NEOM project’s $8.4 billion financial close, watch for a new wave of even larger GW-scale developments to be announced. This signals strong investor confidence in the long-term bankability of green hydrogen and ammonia.
• If newly operational plants like Sinopec’s Xinjiang facility consistently achieve their nameplate production capacity, these could be happening: accelerated adoption by other industrial players and improved investor confidence in execution capabilities. Any significant underperformance or delays would signal persistent technical and operational hurdles.
• If governments strengthen or expand subsidy programs, watch for a rapid increase in the number of projects reaching FID. The future of many projects depends on incentives, and the high upfront cost remains a major barrier, highlighting the persistent green hydrogen risk for developers without policy support.
• If parallel investments in hydrogen pipelines, ammonia-capable port terminals, and cracking facilities accelerate, watch for a more integrated and efficient market to form. The development of this midstream infrastructure is essential to connect large-scale production hubs with distant end-users and unlock the full potential of global hydrogen trade.

The questions your competitors are already asking

This report covers one angle of grid-scale green hydrogen commercialization. The questions that matter most depend on your work.

• Green hydrogen projects reaching final investment decision
• Leading electrolyzer manufacturers market share
• Recent green ammonia offtake contracts
• Cost of converting port terminals for ammonia export

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