“The City paid more than $20,000 for a Helix turbine, famous for other “worst turbine install in history” accomplishments, that generated an incredible 34 kWh in the two years since it was installed on a parking garage.
One of Cascade Engineering’s Swift turbines generated all of 129 kWh in its first year.
The Windspire turbine has generated 166 kWh in more than one year of operation.
On the other hand, the Gaia wind turbine outside of town exceeded it’s projections of 10,500 kWh per year-almost half the total generated by all the turbines in the program.”
(This photo shows a Gaia wind turbine for contrast. It’s just an example of a well designed and properly sited small wind turbine that can make economic sense, unlike the rooftop blunders that give wind energy a bad name.)