bp and Iberdrola have awarded a contract to Toledo-based manufacturer Imefy to supply the power transformer for Spain’s largest renewable hydrogen production facility. The 25 MW plant, set to be built at bp’s Castellón refinery, will play a key role in advancing the country’s green hydrogen sector.
Imefy will be responsible for producing, delivering, and overseeing the installation and commissioning of a three-phase power transformer with a 37 MVA capacity and a 66/30 kV transformation ratio. The equipment is expected to be delivered in the first quarter of 2026.
With an investment exceeding €70m, the Castellón green hydrogen plant is scheduled to begin operations in the second half of 2026. Beyond supplying hydrogen to bp’s refinery, later project phases could extend its use to hard-to-abate industries in the Valencian Community, including ceramics, chemicals, and heavy transport, reducing reliance on natural gas.
Jointly developed by Iberdrola España and bp, the facility will be the country’s most significant green hydrogen plant. It will feature a 25MW electrolyser powered by renewable electricity sourced through a power purchase agreement with Iberdrola España. The agreement will secure 200 GWh per year from Iberdrola’s solar and wind energy projects.
The plant will produce hydrogen via water electrolysis, using 100% renewable electricity to meet European Renewable Fuels of Non-Biological Origin (RFNBO) standards. The project will support the transformation of bp’s Castellón refinery into an integrated energy hub.
Once operational, the plant is expected to generate 2,800 tonnes of green hydrogen annually, replacing part of the grey hydrogen currently produced from natural gas. This transition is projected to cut CO₂ emissions by 23,000 tonnes per year—the equivalent of taking 5,000 cars off the road.
The project has secured €15m in funding through Spain’s Recovery, Transformation and Resilience Plan under the Innovative Value Chain and Renewable Hydrogen Knowledge support initiatives. The funding is backed by the European Union’s NextGenerationEU programme.
