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Sizing, price, lead time — ask directly. We reply within one business day.
Free tool
Estimate annual energy, bill savings and payback time for any rotor diameter and average wind speed. The numbers update as you type — nothing to install, no sign-up.
Indicative only — real output depends on the wind distribution of your site, tower height, turbulence and icing. Send us the coordinates and we will model it properly.
Get a modelled yieldRated power shown by the calculator is a physical estimate for the rotor diameter you entered. Our catalogue models are rated at their design wind speed; use the model list below for real figures.
Instantaneous power in the wind follows the cube law: P = ½ × ρ × A × v³ × Cp, where ρ is air density (1.225 kg/m³ at sea level), A is the swept area of the rotor and Cp is the power coefficient. A well-designed small turbine reaches 0.35–0.42 at its design tip-speed ratio; the gearless permanent-magnet machines we build hold that band across a wide wind range.
Annual energy is not simply rated power × 8,760 hours. We integrate the power curve against a Rayleigh wind distribution (Weibull with k = 2) for the mean wind speed you enter, cut in at 2.5 m/s and stop at 25 m/s. That is why the capacity factor for a good site sits between 20 % and 35 %, not 100 %.
Payback is the installed cost divided by the annual bill saving. It ignores inflation, subsidies and financing, so treat it as a first screen rather than a business case.
Send the site location and the load you need to power. You get a sized model, a price and a lead time — usually within one working day.
