No it starts at 4 mph and I get output at 6-7 mph at 10 mph it is at 50 watts. My wind meter has been at 0 mph for almost a month here. Even when the storms come thru I am at 0 mph here and 10 miles away it was gusting to 50 mph. Storm just went thru south of me and top wind was 12 mph here and was putting out 70 watts. But the trees do have all their leaves. Someday I will get the turbine up to the better wind. In the last 25 days I have only gotten 1kw wind. Solar is at 15 kw. Today is the second time this month I have gotten any wind here.