Facts about wind turbines' actual power production are difficult to find, but University of Maine at Presque Isle (UMPI) is the exception.
Accompanied by much publicity, in May 2009 UMPI purchased and erected a 600 kW Bergey turbine rignt on the campus. It came on line in July 2009 with promises to make information available to the public through a website, using a new "first of its kind" reporting program. The program took months to be fully posted, and sinc then the turbine has had numerous breakdowns and "resets" of its power reporting software.
But the UMPI turbine and the reporting website have been working steadily for a number of months. I calculate the Capacity Factor daily. For instance, the power produced for the past 24 hours (7:30 am -7:30 am) was 1007 kWh, a Capacity Factor of .069. The past ten days had power production of 26263 kWh, or an average power production of 2626.3 kWh per day. This is a ten-day Capacity Factor of .1823. The 10-day period included a near-blizzard. January's CF was .20.
This is the windiest time of the year. September's CF was a paltry .018.
Harrison Roper Houlton/Danforth