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  • Paul Lindsey

    Interesting photos, considering that “small wind” does none of the five things mentioned in the article. It only soaks up tax rebate dollars for people who can afford the high initial cost.

    I’ll start with the one on the right of a Skystream 3.7. As described on this website http://www.fws.gov/southwest/refuges/newmex/sanandres/Ongoing_Projects.html , one of these units was installed (along with solar PV panels) in order to reduce the utility-provided electricity usage. I live approx 1.2 miles along the line-of-sight toward the Organ Mountains, s o was very interested in the actual power output. Since the installation and despite asking several times, the San Andres NWR office has never provided or posted any energy output numbers. For the past 6 months, the unit has been inoperable.

    Today, I drove to the “West Mesa” area of Las Cruces, NM, to see a site where 5 Windspire VAWTs (the left-hand photo) were installed a little over two years ago. Nearby, I spotted another Skystream 3.7 rotating, so I went there first, and met the owner of the residence. The location was excellent. He had purchased the home six months ago from the person who had the turbine installed. That said, he had no idea what the actual turbine output was. He had no data collection, and had even been keeping track of the monthly output. To him, it was the equivalent of a whirlygig, with a noisy gearbox whine that annoyed his nearest neighbors.

    I then drove over to the residence where the owner had installed five Windspires on a bluff overlooking his home. This website shows a photo on the home page: http://www.agrasharp.com/ . Of the five, three were turning very slowly. The owner was outside on his patio when I drove up. I asked if he had any kind of output numbers from the installation, and he referred me to http://www.windspireenergy.com , which has lots of photos of Windspires, but no data from real-world installations. Their own most recent engineering test data http://windspireenergy.com/wp-content/uploads/Energy_11-23-10.pdf showed that the turbine produced power for only 41% of the test period (3,963 of 9,648 hrs), and its total energy production was 1,353 kWh over the 402 days. Here in Las Cruces, that would save the owner about $135 yearly. It also does nothing to reduce the need for utility-generated power, since El Paso Electric would still have to maintain the generating stations and distribution network in order to be able to instantly replace the power as required. At $10K minimum for a single Windspire VAWT, that would be a payback of over 74 years, assuming that all the costs were paid in cash (no interest payments) and no maintenance costs.