The technology is real, specified, and validated — not vague cleantech marketing. Below is the complete technical picture: how it works, what it measures, and what's confirmed today versus what's still being finalised.
Download datasheet
Figures marked tbc are pending final confirmation before publication — they are not estimates presented as fact. Everything else below is drawn directly from the Flotier 100 datasheet.
| Specification | Value |
|---|---|
| Wind speed generation starts at (cut-in) | 3.5 m/s (≈7.8 mph) |
| Minimum operating wind speed | 6 m/s |
| Recommended average annual wind speed | 8 m/s or higher |
| Rated power output (single unit, at 12 m/s) | 150 W |
| System power range (triple-segment system) | 600 W generator, up to 1.2 kW peak |
| Annual energy output, single unit | 298–2,409 kWh/year across 6–20 m/s (see table below) |
| Annual energy output, triple-segment system | up to 5 MWh/year |
| Noise level | ≈40 dB(A), measured at 10 m/s wind speed |
| Unit dimensions (W × H × D) | 1,450 × 1,205 × 1,320 mm |
| Footprint per unit | 1.4 m² |
| Unit weight | 110 kg (160 kg including mounting components) |
| Approximate roof load | 115 kg/m² |
| Electrical output | 3-phase AC voltage, variable with rotor speed — routed through a switchboard to a converter that produces DC for battery storage charging |
| Design lifetime | 20 years (industrial-grade permanent magnet generator) |
| Wind direction sensitivity | Directional — orient roof edge within ±45° of prevailing wind for best performance |
| Roof compatibility | Flat (with or without parapet) and pitched roofs |
| Patent status | Granted in the Czech Republic; second patent filed, EU-wide process underway |
| Average wind speed | Single-unit output |
|---|---|
| 6 m/s | 298 kWh/year |
| 8 m/s | 649 kWh/year |
| 10 m/s | 1,078 kWh/year |
| 12 m/s | 1,542 kWh/year |
| 14 m/s | 1,909 kWh/year |
| 16 m/s | 2,146 kWh/year |
| 18 m/s | 2,305 kWh/year |
| 20 m/s | 2,409 kWh/year |
As wind meets a building, it accelerates sharply around the rooftop edge — a well-documented aerodynamic effect that most buildings simply lose. Flotier is positioned exactly where this acceleration is strongest.
A patented airfoil geometry captures the accelerated airflow and creates a low-pressure zone that draws additional air through the system — amplifying effective wind speed beyond ambient conditions.
The amplified internal flow drives an enclosed, industrial-grade permanent magnet generator, producing three-phase AC voltage that varies with rotor speed. It's routed through a switchboard to a converter, which turns it into DC for charging battery storage.
Engineering CAD drawing of the Flotier 100 unit — airfoil blades and internal generator visible.
| CFD simulations run | 600+ |
| R&D hours invested | 4,000+ |
| Wind tunnel testing | Completed, 2025 |
| Test facility & report | Facility name and full report tbc |
CFD streamline analysis across both gabled and flat-roof buildings identified where airflow separates and accelerates at the roof edge — confirming the weak points of standard roof geometry and the strong points Flotier's placement is designed around. This aerodynamic design was then tested and validated in controlled wind tunnel conditions in 2025.
Pitched roof — wind separates and accelerates at the ridge
Flat roof — accelerated flow at the leading edge, turbulent wake behind
| Attribute | Flotier | Traditional wind turbine | Solar PV (per m²) |
|---|---|---|---|
| Minimum wind speed | 3.5 m/s cut-in, 6 m/s operating | ≈11 m/s (25+ mph) | Not applicable |
| Noise level | ≈40 dB(A) | High — audible at distance | None |
| Moving parts | Internal only — none visible | Large visible external blades | None |
| Urban applicability | Building-integrated, rooftop edge | Requires open land or mast | Requires unshaded roof area |
| Generates at night / winter | Yes | Yes (where wind allows) | No |
| Planning complexity | Low — no mast, no land use change | High — height, noise, siting | Low |
Granted in the Czech Republic; a second patent is filed with an EU-wide process underway.
Status to be confirmed and updated as certification milestones are reached.
Relevant IEC / EN standards compliance to be confirmed.
Czech and EU building code compliance status to be confirmed.
Backed by CzechInvest ("Czech Republic — The Country for the Future"), the Ministry of Industry and Trade, ČVUT Prague, and the Central Bohemian Innovation Center (SIC).
These are the same questions we get asked at every pitch and every site visit — answered straight, with the numbers behind them.
A single unit is rated at 150 W at 12 m/s — modest on its own, which is why Flotier is sold as a modular, multi-unit system rather than a single turbine. A triple-segment system reaches 600 W (up to 1.2 kW peak) and up to 5 MWh/year, and units mount side by side along a roof edge, so output scales with however much edge length a building has. It's built on an industrial-grade permanent magnet generator with a 20-year design lifetime, not a novelty device.
The opposite — that's the specific problem Flotier was engineered to solve. Generation starts at 3.5 m/s, with 6 m/s as the practical minimum and 8 m/s+ recommended for strong output — well below the ≈11 m/s (25+ mph) steady wind traditional large turbines need. The design targets exactly the turbulent, multi-directional, lower-speed airflow found at rooftop edges in cities, not open-field conditions.
The aerodynamic design is the product of 4,000+ hours of R&D and 600+ CFD simulations, and was tested and validated in a controlled wind tunnel in 2025. It's positioned specifically at the building edge, where wind is already known to accelerate — capturing energy most installations simply lose. It also complements solar directly: the housing is designed to take solar panels mounted on top of it.
A single unit is 1,450 × 1,205 × 1,320 mm and weighs 110 kg (160 kg including mounting hardware) — roughly the footprint of a large outdoor AC condenser. It mounts to a base fixed on the roof (anchored directly, or ballast-secured on parapet roofs), with no crane, no mast, and no land required. Installation is closer to a solar PV job than a construction project.
There are no visible external blades — the rotor and generator sit fully enclosed inside the housing. Units sit low, at the rooftop edge, rather than on a tall visible mast, and are generally out of sightline from street level on the commercial and industrial buildings they're designed for.
Noise is approximately 40 dB(A) — quieter than typical roadside traffic noise. The unit mounts via vibration-damping silent blocks, and having no visible external moving blades also removes the main source of noise and vibration in conventional wind turbines.
Have a question that isn't answered here? Get in touch.
Full Flotier 100 datasheet: dimensions, performance curve, mounting, and electrical interface.
Download PDF →Summary version of independent test results.
Testing complete — report pendingMarket opportunity, traction, and financials.
Available on requestNeed documentation ahead of publication? Get in touch and our technical team will share what's available.