It is required that the lower the starting wind speed (can rotate), cut-in wind speed (can generate electricity) and rated wind speed (wind speed that reaches rated power), the better.
At present, the small fan starts at 2-3m/s, the cut-in wind speed is 3-4m/s, and the rated wind speed is 8-13m/s. Generally speaking, the lower the better, and the rated wind speed is low It is far more important than starting wind speed to be low.
And the fan also has a maximum wind speed. Generally, the maximum working wind speed is 25m/s, and the ultimate wind speed is 30-50m/s.