Editing Wind power (section)

===Capacity factor===
Since wind speed is not constant, a wind farm's annual energy production is never as much as the sum of the generator nameplate ratings multiplied by the total hours in a year. The ratio of actual productivity in a year to this theoretical maximum is called the capacity factor. Online data is available for some locations, and the capacity factor can be calculated from the yearly output.<ref name="MassMaritime">[http://view2.fatspaniel.net/FST/Portal/LighthouseElectrical/maritime/HostedAdminView.html Massachusetts Maritime Academy&nbsp;— Bourne, Mass] {{webarchive |url=https://web.archive.org/web/20070211113537/http://view2.fatspaniel.net/FST/Portal/LighthouseElectrical/maritime/HostedAdminView.html |date=11 February 2007}} This 660&nbsp;kW wind turbine has a capacity factor of about 19%.</ref><ref name="iesoOntarioWind">[http://www.ieso.ca/imoweb/marketdata/windpower.asp Wind Power in Ontario] {{webarchive|url=https://web.archive.org/web/20140810202450/http://www.ieso.ca/imoweb/marketdata/windpower.asp |date=10 August 2014}} These wind farms have capacity factors of about 28–35%.</ref>