The SF-500W , SF-1000W , SF-1500W wind-driven generators converts the wind energy into the mechanical energy and in turn, into electricity. By generating power using the wind force and accumulate it in the storage batteries, they can convert the stored power into 220V/50HZ alternating current. Featured by the fact that no fuel is needed, the pollution-free and noise-free wind-driven generation can be generally used where there is much wind and where it is remote from power grid or where the power grid does not work well, for the industrial and domestic use.