Repsol approves €400m, 150MW renewable hydrogen project in Tarragona
Spain's Repsol has taken a go-ahead decision on its largest renewable hydrogen electrolyser to date, developed with Enagas Renovable and backed by up to €104m of public funding.
Repsol has approved the development of a 150MW renewable hydrogen electrolyser in Tarragona, Spain, with an investment of approximately €400m. The facility will be its largest of its kind to date, according to the company.
The project will be developed jointly with Enagas Renovable, which holds a 25% stake. Enagas Renovable is owned 80% by Hy24 and 20% by Enagas.
Output and funding
Repsol said the electrolyser will produce more than 22,000 metric tons of renewable hydrogen a year. The hydrogen will be used mainly at its Ecoplanta and Tarragona refinery to make renewable methanol and other low-carbon-footprint products.
The project has been selected to receive up to €104m under Spain's Hydrogen Valleys programme, which is supported by NextGenerationEU funds.
The company expects the facility to avoid up to 250,000 tons of CO₂ emissions a year. It also expects the development phase to create around 1,000 direct, indirect and induced jobs, mostly local.
The electrolyser will use technology designed to maximise energy efficiency and will run only on reclaimed industrial water. The project also leaves open the option of supplying renewable hydrogen to the natural gas network and the Spanish Hydrogen Backbone in future.
Wider hydrogen portfolio
Tarragona is the second large-scale electrolyser that Repsol and Enagas Renovable have developed together, after the Cartagena project. It joins Repsol's planned renewable hydrogen facility at Petronor near Bilbao. Combined capacity across the three projects comes to 350MW.
Repsol has produced renewable hydrogen at a 2.5MW electrolyser supplying the Petronor refinery since 2023. A 10MW electrolyser at the Port of Bilbao is nearing completion. It is being developed by a Petronor-led consortium that includes Enagas Renovable and the Basque Energy Agency, and its hydrogen will supply a synthetic fuels demonstration plant run by Repsol and Aramco, which is also close to completion.
In Portugal, Repsol is completing a 4MW electrolyser in Sines to supply new polymer materials plants.
Luis Iglesias, director of Business Development and Hydrogen Operations at Enagas Renovable, said the Tarragona project expands the partnership with Repsol and brings renewable hydrogen to places where industrial demand already exists. He described it as a project of "significant scale" that adds to the network of industrial hubs positioning Spain as a southern European leader in green molecules.
