We learned during hurricane Irene that constant change of wind direction and gust are the enemy of wind power making. Although there was a lot of wind, the hurricane was pretty useless for making power. The big gusts would shut the turbine down into protection mode and when the gust stopped the constantly changing direction made for inefficient capturing of the wind.
However, September 13, 2011 “The NEW Best Day Ever” had a near constant moderate wind speed of 9 miles per hour and a constant direction from the south west.
We measured from 6am Sept 13 to 6am Sept 14 we made
60KWH with an average that day of 8.9miles per hour. Looking at the graph, it looks like the power was really made from 10am on averaging a steady ~12mhp.
Wind graph for Sept 13 2011
Wind direction for Sept 13