By euronews
Published on 13/06/2026 – 6:30 GMT+2
A groundbreaking hydrogen-fueled combustion engine has successfully generated electricity for Spain’s national grid, marking a potential milestone for emission-free large-scale power generation, according to its developer, Finland’s Wärtsilä.
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The engine was tested at Wärtsilä’s facility in northern Spain and operates exclusively on hydrogen, addressing a critical challenge in renewable energy systems: maintaining grid stability during periods of low wind and solar output. Unlike hydrogen fuel cells that rely on electrochemical conversion, this system adapts existing large combustion engine technology to burn pure hydrogen directly.
The company envisions deploying multiple units into utility-scale power plants capable of producing hundreds of megawatts. Officials emphasize that such solutions could enable renewable-heavy grids to maintain continuous power generation without carbon emissions, complementing solar and wind without relying on fossil fuel backup.
Despite promising results, experts caution about hurdles for widespread adoption. Expanding hydrogen infrastructure—particularly for production, storage, and transportation—would demand substantial investment. Concurrently, regulatory frameworks would need strengthening to incentivize sustainable hydrogen use.
This development aligns with Spain’s aggressive renewable transition, where wind and solar power already supply an expanding portion of the country’s electricity. The hydrogen innovation appears poised to mature alongside existing renewables in supporting grid reliability.
Content curation • Yolaine De Kerchove Dexaerde
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