ALEKO WGV45W 30W Nominal 45W Maximum 24V Residential Vertical Wind Turbine Generator Mill Diameter: 18", Working Wind Speed: 9-44 Mph Airfoil Length: 18", Nominal Rated Wind Speed: 22Mph Max Wind Speed: 100Mph, Nominal Power Rating: 30w Maximum Power: 45watts Rated Output: 24V DC, Weight: 25Lbs, 1-Year Warranty