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The amount of energy a wind turbine can produce is dependent on three main factors
The amount of wind available
The size of the generator
The amount of wind that a turbine can potentially capture
The last means that a turbine with a large potential wind capture (known as swept area) has the potential to produce more energy than a turbine with a larger generator.
The Gaia 133 11kW turbine is such a machine. The Gaia blades have a diameter of 13m, which gives a swept area of 133m2 , this is more than double that of machines with much larger generators, and yet on low to medium wind speed sites the Gaia will out perform the larger machine.
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