What is the minimum average wind speed that I need? How can I find out if my location meets the minimum speed requirements?

It starts to rotate at a speed of 3.5 metres/second (12.6km/h) and to generate energy from 4 m/s. You can find out the average wind speed at the location by installing an anemometer for a period of approximately 3 months.  Another less precise option is to consult nearby weather stations or wind maps such as those provided by the IDAE .