GEPS Techno is a Saint-Nazaire-based startup that has developed the Inertia wave energy converter — a floating, gyroscope-stabilized platform that converts ocean wave motion into electricity using a gyroscopic mechanical coupling system. One of France’s most technically innovative ocean energy companies, GEPS Techno has raised more than €10 million in funding and successfully deployed a pilot system in the Bay of Biscay — France’s turbulent Atlantic coastline that combines some of Europe’s highest wave energy resources with direct proximity to GEPS’s manufacturing base in Saint-Nazaire. Within France 2030’s deep sea and ocean energy objectives, GEPS Techno represents France’s industrial bet on wave energy — a power source with vast theoretical potential that no country has yet commercially mastered.
Company Overview
GEPS Techno was founded in 2013 in Saint-Nazaire, Pays de la Loire — the city that hosts France’s shipbuilding industry (Chantiers de l’Atlantique, which builds the world’s largest cruise ships and offshore platforms), offshore wind installation port infrastructure, and France’s most significant marine industrial ecosystem. Saint-Nazaire’s industrial heritage in marine engineering, heavy fabrication, and offshore structures is directly applicable to wave energy converter development: the manufacturing, deployment, and maintenance challenges of ocean energy devices are closely related to those of marine vessels and offshore platforms.
The company’s founding insight was that gyroscopic stabilization — already used in ship stabilization, satellite attitude control, and bicycle physics — could be adapted to extract energy from wave motion rather than just resisting it. A free-floating platform in ocean waves naturally oscillates as waves pass. If a gyroscope (a spinning mass in gimbals) is placed inside the platform, the wave-induced oscillation drives the gyroscope’s precession — and that precession can be damped by an electrical generator, extracting energy from the relative motion between platform and wave.
The Inertia system’s key engineering advantage over conventional point absorber wave energy converters (which use a buoy oscillating against a fixed seabed anchor) is that the Inertia platform is fully floating — no mooring to the seabed, no bottom-mounted structure that fails in severe storms. The platform can be deployed in deeper waters inaccessible to seabed-anchored systems and can be retrieved for maintenance using conventional marine equipment.
The Pays de la Loire region and the broader Western France Atlantic coast hold France’s best wave energy resources — annual mean wave power density exceeding 30 kW per meter of wave front in offshore Atlantic locations. For France 2030’s ocean energy objectives, developing commercially viable wave energy converters captures a power resource that is reliably available even when solar and wind are not producing — a critical contribution to renewable energy grid stability.
France 2030 Ocean Energy Context
France 2030’s deep sea and ocean energy pillar — one of the plan’s ten strategic objectives — explicitly funds the development of marine renewable energy technologies including offshore wind (already commercializing), tidal stream turbines, and wave energy. GEPS Techno’s Inertia technology directly addresses the wave energy component of this objective.
The strategic rationale for French wave energy investment is geographic. France has the world’s second-largest exclusive economic zone (EEZ), including extensive Atlantic coastal exposure in mainland France and even more significant wave resources in overseas territories (Réunion, French Polynesia, Martinique, Guadeloupe). France 2030’s ocean energy objectives encompass not just metropolitan France but the energy autonomy of France’s overseas territories — which currently depend heavily on imported fossil fuels and represent France’s most significant renewable energy opportunity in geographic terms.
Bpifrance has funded GEPS Techno through the I-Nov innovation competition and through direct equity participation consistent with France 2030’s deep tech mandate. ADEME (Agence de l’Environnement et de la Maîtrise de l’Énergie) has funded demonstration projects that bridge laboratory validation and commercial deployment — the phase GEPS currently occupies.
IFREMER (Institut Français de Recherche pour l’Exploitation de la Mer) — France’s ocean science and technology institute — has provided technical collaboration on wave resource characterization, hydrodynamic modeling, and wave energy converter design validation. IFREMER’s oceanographic expertise is directly applicable to GEPS’s technical development: wave statistics, mooring system design, and biofouling management all require the scientific inputs that IFREMER generates from its ocean monitoring networks.
Technology: The Inertia System
The Inertia wave energy converter is a gyroscope-based system with several technical innovations that distinguish it from prior gyroscopic wave energy attempts.
Gyroscopic Power Take-Off: The system’s central component is a flywheel (spinning mass) in a gimbal mount. As ocean waves rock the floating platform, the gyroscope precesses — its spinning axis rotates in response to applied torque. An electrical generator mechanically coupled to the precession movement extracts electrical energy from this motion. The generator output is conditioned by power electronics to produce grid-compatible AC power or battery-stored DC for island applications.
Controlled Gyroscope: Unlike passive gyroscopes that resist precession (as in ship stabilizers), the Inertia system uses a controlled gyroscope that maximizes precession speed and therefore electrical output. Active control algorithms — running on real-time sea state measurements — continuously adjust the gyroscope braking torque to maximize power extraction across the range of wave frequencies and amplitudes the platform encounters.
Floating Platform Design: The Inertia platform is designed to maximize wave-induced motion — the opposite objective from conventional ship stabilizers. The hull geometry, weight distribution, and mooring arrangement (if any — some configurations are free-drifting) are optimized through hydrodynamic modeling and wave tank testing to maximize the oscillatory motion that drives the gyroscope.
Scalability: Single Inertia units are designed in the 10-50 kW range — suitable for remote island grids, offshore platform auxiliary power, and coastal monitoring buoys. Wave farms of multiple Inertia units can scale to megawatt-range output for grid-connected applications.
Competitive Landscape
Wave energy globally remains a pre-commercial technology after decades of development. The UK (Wave Energy Scotland), Portugal (WaveEC), Australia (Carnegie Clean Energy), and Sweden (CorPower Ocean) have the most active development programs. CorPower Ocean (Sweden) and Ocean Renewable Power Company (US) are among the best-funded competing approaches using different energy capture mechanisms (point absorbers, overtopping devices, oscillating surge converters).
GEPS Techno’s gyroscopic approach is distinguished from these competitors by the seabed-independence of its design. Point absorbers (the most common wave energy approach) face mooring and structural challenges in deep water; GEPS’s floating system eliminates these constraints at the cost of greater platform complexity.
No wave energy technology has yet achieved commercial scale at competitive costs with offshore wind or tidal energy. This is the fundamental risk facing all wave energy developers: technology readiness and cost reduction targets that have consistently proven more difficult to achieve than initial engineering estimates suggested.
Investor Perspective
GEPS Techno is a high-risk, high-potential investment in an energy technology that could become commercially important but has not yet demonstrated commercial viability at scale. The France 2030 and Bpifrance funding de-risks early development phases, and the pilot deployment provides real-world validation data that supports next-stage fundraising.
The investment thesis requires belief that wave energy’s theoretical advantages — energy density, predictability, 24/7 availability — will eventually translate to commercial viability as technology matures and manufacturing scales. The timeline is uncertain; the France 2030 ocean energy mandate provides sustained public funding support during this uncertainty.
Related Companies
- Sabella — French tidal turbine manufacturer, ocean energy peer
- EEL Energy — French wave energy company, undulating membrane technology
- IFREMER — France’s ocean science institute, technical partner
- Lhyfe — Green hydrogen from renewable energy, potential offshore wave energy customer
- Chantiers de l’Atlantique — Saint-Nazaire shipbuilder, marine fabrication ecosystem