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For anyone curious, a VAWT is a Vertical-axis wind turbine (https://en.wikipedia.org/wiki/Vertical_axis_wind_turbine). I always thought these were less efficient than the conventional designs but they're clearly simpler.

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Conventional designs struggle with low winds, gusty winds and winds coming from wrong direction. VAWT designs generally fare better with such non-ideal conditions, which are going to be common in residential sites.

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