Top 10 Mega Projects Shaping a Sustainable Future in Green Hydrogen

In 2026, green hydrogen—produced through electrolysis using renewable energy sources like solar and wind—stands at the forefront of the energy transition. As nations strive for net-zero emissions, these projects represent massive investments in clean fuel production, often aimed at exporting hydrogen or derivatives like green ammonia for industrial use, transportation, and power generation. Drawing from recent industry reports and databases, here are the top 10 largest green hydrogen projects worldwide, ranked by planned renewable capacity or hydrogen output. Each entry includes brief details on technology, developers, status, and other key aspects. These initiatives highlight global collaboration, with many in feasibility or construction phases, poised to scale up production significantly.

1. Western Green Energy Hub (Australia) Location: Western Australia. Capacity: Up to 70 GW renewables, targeting ~3,500 kt H₂/year. Technology: Wind and solar-powered electrolysis (likely PEM or alkaline). Developers: InterContinental Energy, CWP Global, Mirning Green Energy. Status: Concept/Planning. Key Notes: Spans 15,000 km²; focuses on green hydrogen and ammonia export; estimated cost $70 billion; expanded from initial 50 GW plan.

2. AMAN Project (Mauritania) Location: Northwest Mauritania. Capacity: 30 GW renewables, ~1,700 kt H₂/year. Technology: Solar and wind-integrated electrolysis. Developers: CWP Global. Status: Feasibility study. Key Notes: Emphasizes green ammonia production for export; leverages abundant desert resources; timeline targets 2030 commissioning.

3. Hyrasia One (Kazakhstan) Location: Mangystau Region, Kazakhstan. Capacity: 45 GW renewables, ~3,000 kt H₂/year. Technology: Wind and solar-driven electrolysis. Developers: Svevind Energy Group. Status: Concept/Planning. Key Notes: Aims for green ammonia export; involves KazakhInvest; full operations by 2032; one of the most ambitious in Central Asia.

4. NEOM Green Hydrogen Project (Saudi Arabia) Location: NEOM Megacity, Saudi Arabia. Capacity: 4 GW renewables, 219 kt H₂/year (600 tonnes/day). Technology: Advanced electrolysis (Thyssenkrupp tech) powered by solar, wind, and storage. Developers: Air Products, ACWA Power, NEOM. Status: Construction (over 80% complete as of 2025). Key Notes: World's largest under construction; produces 1.2 million tonnes green ammonia/year for export; $8.4 billion investment; on track for 2026 launch.

5. Hyphen Hydrogen Energy Project (Namibia) Location: Tsau Khaeb National Park, Namibia. Capacity: Up to 7 GW renewables, ~300 kt H₂/year equivalent. Technology: Solar and wind electrolysis. Developers: Hyphen Hydrogen Energy (joint venture with Namibia govt). Status: Planning/Feasibility. Key Notes: Spans 4,000 km²; focuses on green ammonia; aims for African leadership in H₂ export; commissioning targeted for late 2020s.

6. Green Energy Oman (Oman) Location: Al Wusta Governorate, Oman. Capacity: 25 GW renewables, ~1,800 kt H₂/year. Technology: Solar and wind-powered electrolysis. Developers: OQ, InterContinental Energy, EnerTech. Status: Feasibility study. Key Notes: Targets green fuels for export; integrates with Oman's energy strategy; full scale by 2038.

7. Project Nour (Mauritania) Location: Mauritania. Capacity: 10 GW renewables, ~1,200 kt H₂/year. Technology: Renewable electrolysis. Developers: Chariot Energy. Status: Feasibility study. Key Notes: Focuses on domestic and export markets; leverages wind resources; 2030 target.

8. Hydrogen City (United States) Location: Texas, USA. Capacity: 60 GW renewables, ~3,000 kt H₂/year. Technology: Solar and wind electrolysis. Developers: Green Hydrogen International. Status: Concept. Key Notes: Includes production of green ammonia, electricity, and rocket fuel; phase 1 by 2026.

9. NortH2 (Netherlands) Location: Groningen, Netherlands. Capacity: 10 GW offshore wind, ~1,000 kt H₂/year. Technology: Offshore wind-powered electrolysis. Developers: Equinor, RWE, Shell, Gasunie. Status: Concept. Key Notes: Europe's largest planned; integrates with existing gas infrastructure; full operations by 2040.

10. AquaVentus (Germany) Location: North Sea, Germany. Capacity: 10 GW offshore wind, ~1,000 kt H₂/year. Technology: Offshore wind electrolysis. Developers: RWE and partners. Status: Concept. Key Notes: Aims for centralized offshore H₂ production; supports Germany's H₂ strategy; 2035 target.

Project	Location	Renewable Capacity (GW)	H₂ Output (kt/year)	Primary Technology	Status
Western Green Energy Hub	Australia	70	3,500	Wind/Solar Electrolysis	Planning
AMAN Project	Mauritania	30	1,700	Solar/Wind Electrolysis	Feasibility
Hyrasia One	Kazakhstan	45	3,000	Wind/Solar Electrolysis	Planning
NEOM Green Hydrogen	Saudi Arabia	4	219	Solar/Wind/Storage Electrolysis	Construction
Hyphen Hydrogen Energy	Namibia	7	300	Solar/Wind Electrolysis	Feasibility
Green Energy Oman	Oman	25	1,800	Solar/Wind Electrolysis	Feasibility
Project Nour	Mauritania	10	1,200	Renewable Electrolysis	Feasibility
Hydrogen City	USA	60	3,000	Solar/Wind Electrolysis	Concept
NortH2	Netherlands	10	1,000	Offshore Wind Electrolysis	Concept
AquaVentus	Germany	10	1,000	Offshore Wind Electrolysis	Concept

These projects underscore the rapid evolution of green hydrogen, with over 1,500 global initiatives in the pipeline and $110 billion in committed investments. Challenges remain, including high costs and infrastructure needs, but breakthroughs in 2026—such as NEOM's launch—could accelerate adoption. As production scales, green hydrogen may become a cornerstone of decarbonization, powering everything from heavy industry to zero-emission vehicles.

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