
TheRenewableEnergyHandbook | page 39 | https://thedailydialectics.com/pdfs/tesla/TheRenewableEnergyHandbook/TheRenewableEnergyHandbook.pdf
In order to interpret these data you will need to know that grid-tied turbines require an annual average wind speed of 5 m/s (meters per second) which is about 11 miles per hour. 3-4 m/s (7-9 mph) should suffice for marginal application such as the charging of batteries in systems not connected to…