SYLFEN

Their core work

SYLFEN is a French deep-tech SME specializing in reversible solid oxide cell (rSOC) technology — devices that can operate as electrolyzers (converting electricity into hydrogen) or as fuel cells (converting hydrogen back into electricity) depending on grid demand. Their core contribution to EU projects is the development and integration of this bidirectional energy conversion hardware into real-world local energy systems. In REFLEX, they worked on optimizing the rSOC unit itself within a mixed local energy context; in GIFT, they applied similar technology to island microgrids, combining it with virtual power system architectures and innovative battery storage. Their value proposition is the technical bridge between advanced electrochemical hardware and practical energy flexibility systems.

What they specialise in

How they've shifted over time

SYLFEN's first project, REFLEX, focused squarely on the core electrochemical technology — the reversible solid oxide cell itself and how it fits into a local energy mix. Their second project, GIFT, shifted the application lens toward island grids, virtual power systems, and multi-technology storage integration, suggesting a deliberate move from component-level R&D toward system-level deployment scenarios. The trajectory is clear: SYLFEN started with the technology and is progressively embedding it into more complex, real-world energy architectures.

SYLFEN is moving from foundational electrochemical hardware development toward integrated energy system applications, with a particular focus on isolated and island microgrids — a market segment with growing EU policy and investment interest.

How they like to work

SYLFEN has participated exclusively as a consortium partner, never as project coordinator, which is typical for a young deep-tech SME still building its technology base. Their two projects together brought 26 unique partners across 11 countries, suggesting they operate comfortably in large, multi-national consortia rather than small bilateral arrangements. This profile — specialist contributor in pan-European teams — indicates they are valued for a specific technical competence rather than project management capacity.

SYLFEN has built a network of 26 unique consortium partners spanning 11 countries, which is unusually broad for an SME with only 2 projects. This suggests their rSOC technology is in demand across multiple European research communities, from southern island-grid contexts (GIFT) to broader energy transition consortia (REFLEX).

What sets them apart

SYLFEN occupies a rare niche: a private SME with hands-on rSOC hardware expertise that is also capable of contributing to system-level virtual power plant and energy management architectures. Most actors in the reversible solid oxide space are either large industrial players or university labs — SYLFEN's SME profile makes them an agile, IP-driven partner for demonstration projects and pre-commercial deployments. For a consortium building around hydrogen storage or island grid resilience, SYLFEN brings both the core technology and direct industrial stake in its commercialization.

Highlights from their portfolio

• GIFT
  SYLFEN's largest project by EC funding (EUR 1,053,504), and the one with the most explicit keyword fingerprint — islands, virtual power systems, innovative batteries — making it the clearest window into their applied system integration capabilities.
• REFLEX
  This project established SYLFEN's core H2020 identity around reversible solid oxide electrolyzer and fuel cell technology, positioning them at the intersection of hydrogen and local energy systems from the outset.