World’s first large-scale 100% hydrogen engine tested at Wärtsilä’s Bermeo laboratory to support the Spanish grid
Wärtsilä Corporation, Press release, 11 June 2026 at 05:00 AM EEST· Wärtsilä Energy has successfully operated a new 100% hydrogen engine supplying power to Spain’s national electricity grid in Bermeo, Spain. This is the world’s first demonstration of a large-scale hydrogen engine running on 100% pure hydrogen. · The demonstration marks a significant step beyond hydrogen-ready technologies, proving that engine-based power generation can run entirely on hydrogen in real grid conditions – paving the way for this capability to become a reality at scale in the future. · Hydrogen-fuelled