Elcogen, Hygreen Explore Solid Oxide Partnership
Estonian and Beijing-based firms signed a memorandum of understanding to consider pooling solid oxide stack technology for new applications and markets.
Updated on Nov. 3, 2026 in Energy
Elcogen, an Estonian maker of solid oxide fuel cell and electrolysis technology, and Hygreen Energy, a Beijing-based electrolysis specialist, signed a memorandum of understanding on a proposed partnership. The companies are considering pooling their expertise to offer solid oxide stack technology to new applications and markets.
Why it matters
The proposed collaboration would pair Elcogen's stack technology with Hygreen's project experience as the companies look to move solid oxide systems beyond laboratory-scale testing. It reflects continued interest in high-temperature electrolysis and fuel cell technology as a route to clean power generation.
The partnership is documented by a memorandum of understanding, a non-binding preliminary agreement. Elcogen's capacity increased from 10 MW to 360 MW, while Hygreen reports more than 300 delivered electrolyser projects, but the partnership's financial and operational terms remain undisclosed.
The players
Elcogen
Elcogen is an Estonian manufacturer of solid oxide fuel cell and electrolysis technology whose cells, stacks, and modules are integrated into third-party systems.
Hygreen Energy
Hygreen Energy is a Beijing-based electrolysis and clean power generation specialist that has delivered more than 300 electrolyser projects.
The details
Hygreen currently supplies alkaline, PEM, and AEM electrolyser systems, while Elcogen's cells, stacks, and modules are integrated into third-party systems. The companies will consider localised manufacturing and product supply arrangements, and Hygreen aims to add SOEC and SOFC products to its portfolio.
Timeline
September: Elcogen opened its ELCO I manufacturing facility on the outskirts of Tallinn, Estonia.
Over the next two years: The companies aim to move from laboratory-scale development toward MW-scale demonstration systems.
Big Picture
The collaboration places Elcogen's solid oxide stack technology within the broader push to commercialize SOEC and SOFC systems, moving from manufacturing scale-up at ELCO I toward MW-scale demonstrations. It marks an extension of that trajectory into new applications and geographies through a partner that already sells alkaline, PEM, and AEM electrolysers.
For readers, the partnership is a signal of how solid oxide electrolysis and fuel cell systems may reach new buyers over time, but it does not yet change availability or pricing. Any practical effect on clean power projects will depend on whether the proposed demonstrations and localised manufacturing arrangements materialize.
The takeaway
Watch for whether the partnership moves from a memorandum of understanding to concrete demonstration projects, since that transition will show whether solid oxide stack technology is ready for wider deployment.
What happens next
The companies plan to move toward MW-scale demonstration systems over the next two years, though no specific dates for those milestones were given.
Further reading
For more on the technologies behind this deal, see Energy coverage.
