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. My weather report comes from Jefferson,Ohio. A 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.