Spanish energy group Repsol Investment has acquired a minority stake in electrolyser company Stargate Hydrogen.
Earlier in 2025, Stargate secured an €11m Series A funding round and inaugurated its new factory. The company said the incorporation of Repsol as an industry partner reinforces this momentum and will enable the expansion of its manufacturing capacity, accelerate research and development initiatives, and strengthen its commercial operations across Europe, the Middle East and Asia.
Stargate’s chief executive Marko Virkebau said: “Repsol is the largest producer and consumer of hydrogen in Spain; therefore, it has extensive first-hand experience of the complexities of hydrogen projects.
“We are delighted that this partnership will allow us to work together on multiple fronts, from R&D and product development to commercial deployment of Stargate’s innovative electrolyser technology.”
Repsol’s director of open innovation and corporate venturing Gema García said: “Renewable hydrogen is essential to our decarbonisation roadmap.
“What we are looking for are innovative approaches to its production, enabling more efficient production.
“We have closely followed Stargate Hydrogen’s work in recent years and are confident that it can be a great ally for us to accelerate our renewable hydrogen developments.”
By 2030, Repsol plans to reach between 700MW and 1.2GW of installed hydrogen capacity.
The partners said their alliance is built on a shared goal to reduce the cost of renewable hydrogen production and accelerate the decarbonisation of heavy industries.
They said Stargate’s patented technology, featuring advanced ceramic catalyst materials and novel stack design, enables affordable renewable hydrogen production on a large scale.
Stargate’s current manufacturing capacity is 140MW per year, but the company said this can be scaled up to 1GW with modest additional investments.