The project will blend the renewable hydrogen into the country’s gas grid, operated by the transmission service operator (TSO) Enagás.

It will initially run a 5MW decoupled water electrolyser (DWE) powered by 10MW of solar energy, before later scaling up to 50MW of electrolysis and 80MW of solar capacity.

H2Pro and Doral Hydrogen believe the plant would be the first of its kind to undertake hydrogen blending using entirely off-grid solar power.

According to H2Pro, its DWE systems can operate even with irregular solar power.

The company’s CEO, Tzahi Rodrig, said its technology, in combination with Doral’s renewable power expertise, could demonstrate a new model for economically viable off-grid hydrogen production.

“The ability to operate on intermittent renewable power, with endless on and off cycles and high efficiency at partial loads, is critical to unlocking lower-cost green hydrogen,” he continued.

Doral Hydrogen, the green hydrogen subsidiary of Doral Group, is already developing 1GW of green projects across the US, Middle East, Europe, and Australia.

Hydrogen blending remains deeply divisive, with critics arguing it could undermine the value of hydrogen, as even at 20% blending – a level generally considered safe  – emissions fall by only around 7%.

However, early adopters, including gas network operators, see it as a way to demonstrate hydrogen readiness and keep their assets relevant in a decarbonising system.