How to use the Small Wind Turbine Yield Calculator
The Formula
Kinetic power in wind scales with the cube of speed—double the breeze delivers eight times the power potential. Swept area grows with diameter squared. Small changes in site wind or hub height dominate turbine payback.
Practical Example
P (W) ≈ ½ × 1.225 × π(d/2)² × v³ × efficiency. Daily kWh ≈ time-averaged power × 24 h, with a Rayleigh-style factor on mean wind (planning only). Install below ~2.5 m/s average acts as cut-in for most units.
About Small Wind Turbine Yield Calculator
Why wind yield follows v³
Kinetic power in wind scales with the cube of speed—double the breeze delivers eight times the power potential. Swept area grows with diameter squared. Small changes in site wind or hub height dominate turbine payback.
Formulas used
P (W) ≈ ½ × 1.225 × π(d/2)² × v³ × efficiency. Daily kWh ≈ time-averaged power × 24 h, with a Rayleigh-style factor on mean wind (planning only). Install below ~2.5 m/s average acts as cut-in for most units.
Site vs. spreadsheet
Raise turbines above roof turbulence, clear trees in prevailing wind sector, and use real hub-height wind data—not ground-level guesses. Pair with Solar Daily Yield for hybrid microgrid sizing.
Frequently asked questions
Q: Efficiency above 59%? A: Betz limit is aerodynamic only—enter manufacturer overall system %. Q: Urban roof? A: Turbulence slashes yield; measure first. Q: Night production? A: Wind complements solar when resource exists—this tool quantifies kWh if wind is there.