H2FLY GMBH

Their core work

H2FLY is a Stuttgart-based technology SME specializing in hydrogen fuel cell propulsion systems for aviation. They design and integrate high-power-density fuel cell powertrains fueled by liquid hydrogen, targeting aerial passenger vehicles — one of the most demanding applications in the emerging hydrogen mobility space. In HEAVEN, they coordinated the development of a complete FC system architecture that combines cryogenic liquid hydrogen storage with aircraft-grade electric propulsion. Their work sits at the intersection of hydrogen energy technology and aerospace engineering, addressing one of aviation's hardest decarbonization challenges.

What they specialise in

How they've shifted over time

H2FLY entered H2020 in 2017 through MAHEPA as a participant in broad hybrid electric propulsion research, at a stage where hydrogen was one option among many and no specific fuel type was foregrounded. By 2019, they had narrowed sharply to liquid hydrogen fuel cells and cryogenic systems for passenger aerial vehicles, and took on the coordinator role in HEAVEN — indicating a deliberate strategic focus rather than opportunistic project-chasing. The trajectory is clear: from general electric aviation propulsion toward a specialist position in liquid hydrogen aviation powertrains.

H2FLY is moving toward establishing itself as a specialist integrator of liquid hydrogen fuel cell systems for commercial passenger aircraft — a niche that positions them well for the next wave of clean aviation programmes expected in Horizon Europe.

How they like to work

H2FLY has operated in both leadership and support roles across their two projects, coordinating HEAVEN and participating in MAHEPA, which shows comfort at different positions in a consortium. With 13 unique partners from just 2 projects, they engage in moderately broad consortia rather than tight bilateral partnerships. Their move to coordinator status in their second project suggests they are actively building project leadership capacity, not content to remain a technical sub-contractor.

H2FLY has built a network of 13 unique partners across 6 countries from only 2 projects, a notably broad reach for an SME at this stage. Their partners likely span aerospace OEMs, research institutes, and hydrogen technology companies, given the cross-disciplinary nature of both projects.

What sets them apart

H2FLY is among a very small group of European SMEs with demonstrated, project-validated expertise in liquid hydrogen fuel cell systems specifically for aerial passenger vehicles — a combination that most aerospace incumbents and energy companies have not yet operationalised. Having coordinated an EU-funded project in this space, they carry both technical credibility and project management track record that pure research groups cannot offer. For consortia targeting green aviation, hydrogen mobility, or cryogenic energy systems, H2FLY brings rare hands-on integration experience rather than theoretical competence.

Highlights from their portfolio

• HEAVEN
  H2FLY's coordinator role in this project — developing a high-power-density liquid hydrogen fuel cell system for a passenger aerial vehicle — represents the clearest statement of their core technical identity and leadership ambition.
• MAHEPA
  Their entry into EU research consortia through a modular hybrid electric propulsion project established the aviation propulsion foundation on which their subsequent hydrogen specialisation was built.