Inside NEOM’s Green Hydrogen Plant: Final EPC Push and Electrolyser Installations Before Startup

Across updates, the build has been described as approaching its final stretch. A June 2025 announcement cited 80% construction completion across all sites, including the hydrogen facility, wind garden, solar farm, and transmission grid. By early 2026, several outlets reported construction as 90% complete across the integrated scope, again covering the hydrogen production facility, renewables, and grid. In parallel, NGHC has said its renewable power generation assets—wind farm, solar installation, and the transmission grid—reached about 95% completion as of a March update cited by Energy Intelligence. These numbers frame the near-finish EPC picture across multiple workfronts rather than a single unit.

What the Late-Stage EPC Scope Includes at Oxagon

The NEOM green hydrogen plant construction EPC effort has been structured to deliver an integrated system: power generation, transmission, and the hydrogen-and-ammonia process units. Air Products was awarded the main EPC contract, and L&T (Larsen & Toubro) received a sub-EPC contract during the first phase that began in Q2 2020. The project is described as being built in multiple phases. As construction progressed, milestone equipment was reported as received and installed by June 2025, including electrolysers, hydrogen storage tanks, and pipe racks. The plant sits at Oxagon and is described as covering an area of 300 km² within the NEOM megacity.

Cost and financing details also define how the build is being executed. One report lists the project cost at USD 8.4 billion, while another cites USD 8.5 billion. Funding is described as coming from local, regional, and international banks, including a figure of 23 banks and financial institutions in one source. The project reached financial close on May 22, 2023, when an exclusive 30-year offtake agreement for the green ammonia produced was signed. Reports also characterize this moment as a major step for gigawatt-scale green hydrogen developments, enabling accelerated procurement and on-site execution.

Commissioning and delivery timing is discussed as a sequence rather than a single date. IndexBox reports that ACWA Power and Air Products have finished construction and that the facility has entered the commissioning phase, citing a senior official and comments made on an earnings call. Separately, NGHC updates point to up to 4 GW of combined solar and wind power capacity targeted for completion by mid-2026, followed by commissioning of electrolysers and first green ammonia output planned for 2027. This positions the remaining work as integration, commissioning, and staged start-up across renewable generation and process units, with product availability expected in 2027.