Alkaline electrolyzer firm Stargate Hydrogen Solutions OÜ (Tallinn, Estonia) has entered into an alliance with Repsol S.A. (Madrid, Spain). The transaction, in which Repsol’s Corporate Venture arm acquired a minority stake in Stargate Hydrogen’s share capital, strengthens Stargate’s position as an international benchmark in technological leadership and competitiveness in the renewable hydrogen sector.
Earlier in 2025, Stargate secured an 11 million EUR A-round and inaugurated its new factory. 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.
“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 electrolyzer technology,” said Marko Virkebau, CEO of Stargate Hydrogen.
“Renewable hydrogen is essential to our decarbonization 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,” said Gema García, Director of Open Innovation and Corporate Venturing at Repsol.
This industry alliance is built on a shared goal: significantly reducing the cost of renewable hydrogen production to accelerate the decarbonization of heavy industries and enhance Europe’s energy independence in critical energy production technologies. Stargate Hydrogen’s patented technology, featuring advanced ceramic catalyst materials and novel stack design, offers significant economic advantages over competing solutions, enabling affordable renewable hydrogen production on a large scale. The company’s current manufacturing capacity is 140 MW per year, which can be scaled up to 1GW+ with modest additional investments.