The Estonian OEM first agreed to supply its Gateway200 module last year. Located near the Loviisa nuclear power plant, the electrolyser will use electricity from the main grid and household water sources to produce green hydrogen.

With commissioning set to begin, the project is expected to be operational for around two years.

“Our Gateway 1MW system is designed to meet the demands of industrial-scale green hydrogen production and will enable Fortum to harvest the potential of hydrogen,” explained Marko Virkebau, Stargate’s CEO.

While the project will be used to gather data on hydrogen production, some of the green hydrogen produced at the Kalla Test Centre could be used in the Loviisa plant’s own processes.

Furthermore, Fortum announced last year that a hydrogen refuelling station would be built to deliver hydrogen to industrial customers.

In a Stargate Hydrogen statement, they said the initiative will “serve as a blueprint for larger industrial-scale hydrogen plants across the region.”

Earlier this year, the Tallinn-based manufacturer opened its new alkaline electrolyser factory with a full 2025 order book.

The plant, which will initially deliver 140MW of systems per year, could be expanded to over 1GW after its first phase with minor additional investments.