Newmeil Company is a professional manufacturer of wind turbines in China. Our products range from 400w to 5kw wind turbines. They have got very good feedback,expecially 400w and 600w.
Here is typical  model-X600,pls have a look.

model name	V600
rated power	600W
max power	700W
output voltage	24V
start wind speed	2.0m/s
rated wind speed	13m/s
working wind speed	2-45m/s
gross weight	15KG
rotor diameter	1.85m
blade number	3
blade material	CFRP
generator	three-phase permanent magnet synchronous generator
control system	manual&electromagnetic brake
tower pole type	6m
Capacity and quantity of battery(reference)	12V100AH   2PCS
can supply power for	lighting,electric fan,TV,washer