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* A metric horsepower of 75 kgf-m per second is equivalent to 735.499 watts. * A boiler horsepower is used for rating steam boilers and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit, or 9,809.5 watts. * One horsepower for rating electric motors is equal to 746 watts.
The output of a wind turbine depends on the turbine's size and the wind's speed through the rotor. Wind turbines being manufactured now have power ratings ranging from 250 watts to 1.65 megawatts (MW). Example: A 10-kW wind turbine can generate about 16,000 kWh annually, more than enough to power a typical household. A 1.65-MW turbine can produce more than 4.7 million kWh in a year--enough to power more than 470 households. The average U.S. household consumes about 10,000 kWh of electricity each year.