Syntholene Energy has completed construction on its geothermal-integrated solid oxide electrolyser cell (SOEC) demonstration facility in Húsavík, Iceland around six months ahead of the initial schedule. News of the accelerated timeline was posted earlier this month.
The demonstration facility is the first fully integrated field deployment of Syntholene’s thermal-hybrid architecture, designed to “demonstrate potential cost and energy efficiencies of integrating geothermal heat with high-temperature electrolysis for the production of low-cost hydrogen – the principal feedstock for synthetic fuel production”, according to Syntholene’s press release. The site will be the foundation for operational testing, systems validation and real-world performance data collection, with publication of initial efficiency and technoeconomic results expected in Q4 of 2026.
Dan Sutton, Chief Executive Officer of Syntholene, commented: “Completing a first of its kind energy facility ahead of schedule and under budget is rare. Achievement of this milestone reflects the quality of our engineering team, project partners and execution discipline. Syntholene has now graduated from concept and prototyping into real-world operations. Over the next few months of effects testing, we seek to demonstrate practically that geothermally-integrated SOEC hydrogen production can materially improve the economics of synthetic fuel.”
Syntholene Energy Completes Demonstration Facility Construction




