Harness the power of the breeze—calculate your small wind turbine's potential yield and see if wind energy is the right fit for your property.
Solar is predictable by latitude and roof azimuth. Wind is predictable only after you measure it—yet the physics is elegant: power in the moving air scales with wind speed cubed and rotor swept area. A modest diameter change or a slightly higher hub can matter more than swapping inverter brands.
Why estimate wind yield before buying hardware
Small wind has a checkered marketing history because buyers skipped site work. The calculator is a sanity filter:
- Does v³ math at your mean wind speed produce meaningful kWh?
- Is annual energy worth capex next to solar on the same pole?
- Is the resource strong enough for hybrid battery sizing?
It does not replace a professional site assessment—but it stops orders of magnitude errors.
The core relationship (why v³ dominates)
Kinetic power in wind:
P ≈ ½ × ρ × A × v³ × η
| Variable | Effect |
|---|---|
| ρ (air density) | ~1.225 kg/m³ at sea level |
| A (swept area) | π × (diameter ÷ 2)² |
| v (wind speed) | Cubic — 6 m/s vs. 4 m/s is (6/4)³ ≈ 3.4× power |
| η (efficiency) | Overall system fraction (often 25–45%) |
Daily and annual kWh apply a time-averaging factor for gusty distributions—planning grade, not warranty grade.
Pair with solar and storage
Wind can produce when PV is idle—if the resource exists at hub height. Use outputs to compare:
- Solar Daily Yield — daytime kWh
- Microgrid ROI — combined economics
- This tool — night/weather complement when wind is real
Rural properties with open fetch and honest anemometer data win. Tree-lined suburbs on short masts usually lose. Let the cube law tell you which camp you are in before the turbine ships.