Syntholene’s geothermal-integrated SOEC hydrogen platform could produce hydrogen at an estimated $1.75–$2.10/kg, about one-third the cost of comparable unsubsidized green hydrogen in Europe. Its Iceland demonstration facility aims to validate low-emission hydrogen production and support future commercial-scale deployment, while addressing risks such as electricity costs, electrolyzer durability, and capital expenses.
Syntholene has concluded that its geothermal-integrated hydrogen production platform could achieve production costs one-third those of green hydrogen produced in Europe. Kellogg Brown and Root (KBR), which conducted the financial analysis, estimated Syntholene’s levelized cost of hydrogen (LCOH) at approximately $1.75/kg under best-case Icelandic geothermal scenarios and around $2.10/kg under broader deployment conditions. “Recent unsubsidized estimates of comparable green hydrogen prices across Europe averaged around €6.71/kg H2,” wrote the Chicago-based company, which operates a demonstration facility in northern Iceland. The report also highlighted key risks, including electricity price volatility, long-duration solid oxide electrolyzer cell (SOEC) degradation, stack lifetime assumptions, project-specific capital costs, and operating cost validation. Syntholene is operating a geothermal-integrated SOEC demonstration facility in Húsavík, Iceland. The project combines geothermal heat and power with high-temperature SOEC technology to demonstrate a low-emissions pathway for hydrogen production. The facility aims to validate the technical performance and cost potential of thermally integrated hydrogen production for future synthetic fuel applications. Syntholene says the demonstration marks the first successful operation of a geothermally integrated SOEC hydrogen production system. The company plans to use operational data from the facility to support future commercial-scale deployment of its hydrogen and e-fuel technologies.
