Founded in 2001 by Enn Õunpuu, Elcogen was established to commercialise advanced fuel cell technology and deliver cleaner, more efficient energy solutions at scale. Drawing on Estonia’s strong scientific heritage in electrochemistry, Õunpuu recognised the untapped potential of solid oxide fuel cells as a high efficiency alternative to combustion based energy generation.
Elcogen AS established as foundation of company operations.
Elcogen OY established to develop solid oxide stack technology.
Elcogen started up its first solid oxide cell pilot production line
Earns ISO certification for standardised fuel cell production.
Moves to Tallinn facility with production and R&D capabilities.
Joins project developing fuel cells for LNG-powered ships.
Wins innovation category at European Business Awards final.
Cells power world’s first solid oxide fuel cell drone.
Wins Estonia’s top entrepreneurship award for innovation excellence.
Signs agreement to advance solid oxide electrolyser commercialisation.
Receives EUR 24.9 million to scale hydrogen and fuel cell production.
Secures EUR 45 million to expand clean power and hydrogen collaboration.
Validates hydrogen technology with successful 2000-hour electrolyser testing.
Named in Global Cleantech 100 for sustainable energy innovation.
Partners with TNO to advance solid oxide electrolyser innovation.
Partners with AVL to develop megawatt-scale electrolyser stack modules.
Receives European award for innovation in emission-free power and hydrogen.
Baker Hughes and Mirae invest EUR 31 million to advance hydrogen technologies.
Secures EUR 5 million to expand operations and accelerate global growth.
Named among TIME’s top companies reducing global environmental impact.
Opens Tallinn facility to scale global clean energy manufacturing capacity.
Appoints director to drive India and APAC clean energy partnerships and growth.
Over more than two decades, Elcogen has evolved from a research-focused venture into an international organisation. The company has its registered office in the United Kingdom and its main headquarters in Tallinn, Estonia. Its research and development centres of excellence in Estonia and Finland reflect a strong commitment to scientific innovation and collaboration. Elcogen also has representation in India and China, supporting its growing international presence.
Today, we employ 130+ intelligent and passionate employees representing 19 different citizenships, with around 1 in 5 colleagues holding PhDs, demonstrating our commitment to expertise and diversity in driving innovation.
From the beginning, Elcogen has focused on solid oxide fuel cell technology, working closely with leading academic institutions including University of Tartu. This collaboration helped bridge the gap between research and commercial application. After years of development, the company reached an important milestone in 2010 with its first pilot production and initial customer deliveries, demonstrating the reliability and performance of its technology.
Today, Elcogen serves a growing global customer base. Its fuel cells, stacks and modules are integrated into third-party systems, delivering consistent performance and reliability across a wide range of applications. In addition to supplying components, Elcogen provides comprehensive services to support technology integration, ensuring seamless adoption and optimal functionality. These solutions are designed to unlock the full potential of renewable energy and deliver higher efficiency than traditional technologies.
In 2025, Elcogen opened its new production facility, ELCO I, on the outskirts of Tallinn. This marked a significant step in scaling operations from pilot production to mass manufacturing, with a capacity of up to 360 megawatts at full output. As the company continues to expand, it remains focused on advancing clean energy technology and supporting the global transition to more sustainable energy solutions.