S
Sylfen
Rendering decentralized renewable energy productions reliable, thanks to hydrogen storage
About Sylfen
Sylfen, founded in 2015 as a spin-off from the French Alternative Energies and Atomic Energy Commission (CEA), is at the forefront of developing distributed energy systems to enhance building energy autonomy. The company was established by Nicolas Bardi and Caroline Rozain, who were later joined by Marc Potron in 2016. Their foundation is built upon more than a decade of R&D at the CEA, leveraging a portfolio of patents to address the challenges of energy transition.
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The core of Sylfen's offering is the Smart Energy Hub, an integrated solution for energy storage and co-generation. This system uniquely combines a reversible solid oxide electrolyzer with a fuel cell, allowing it to perform multiple functions. In electrolyzer mode, it converts surplus renewable electricity, such as from solar panels, into hydrogen for storage. In fuel cell mode, it uses this stored hydrogen, or alternatively biogas or natural gas, to produce both electricity and heat. This dual capability is designed to smooth out the intermittency of renewable sources, providing a stable power supply. The system is hybridized with batteries to manage rapid power fluctuations and ensure immediate energy availability.
Sylfen's business model encompasses the full lifecycle of its product, from initial building analysis and system design to manufacturing, installation, and ongoing maintenance. This full-service approach aims to maximize the return on investment for its clients. The company targets a diverse market, including commercial and public buildings like offices, logistics facilities, schools, and subsidized housing, typically ranging from 2,000 to 10,000 square meters. By recovering and utilizing the heat generated during its processes, the Smart Energy Hub can achieve an overall energy efficiency of up to 90%, significantly reducing CO2 emissions and energy costs for building owners. To date, Sylfen has raised a total of $10.5 million, with a notable Series A round in May 2022 that brought in investors such as IDEC GROUP, Supernova Invest, and CEA Investissement.
At a glance
- Status
- Operational
- Founded
- 2015
- Headquarters
- Le Cheylas, France
- Employees
- 8
- Open positions
- None listed
- Dealroom signal
- 76.2/100
- Sub-industry
- Clean Energy, Energy Efficiency, Energy Storage
- Sector
- Energy, Smart Building, Hydrogen, Battery, Spinout, Sustainable Development Goals, Climate Tech, Stationary Energy Storage
- Technology
- Hardware, Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| EARLY VCOther financing | May 2022 | $11M | $44M | Elaïs Capital · InnoEnergy · Supernova Invest · IDEC Group | ↗ |
| EARLY VCOther financing | Dec 2021 | $0 | — | CEA Investissement · InnoEnergy · IDEC | — |
Financials
Revenue, earnings and other financial measures where available. Years marked “E” are estimates.
Growth signals
Latest recorded traffic for Sylfen is 320 monthly website visits, up 300% over the last three months. Sylfen's team grew 14.3% over the past year.
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Series A7 investors entered at this stage
CEA Investissement
InnoEnergy
IDEC- ECElaïs Capital
Supernova Invest
IDEC Group
Crédit Agricole Alpes Développement
Other known investors4 additional known investors
HEC Paris
CEA-Leti
French Alternative Energies and Atomic Energy Commission - CEA
HEC Challenge+
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Sylfen on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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