Dear Sir, Qingdao Tianyue Import And Export Co., Ltd. is a professional suppliers of wind turbine(300w to 50kw), solar lamps, solar panel., solar energy systems.we have our own factory, our products have passed ISO and CE certificate, the products are mainly exported to the European market, we assure you the high quality and reliable price.we will provide you the installation CD of wind turbine .if you are interested in our products , you can browse our website:***** give me your email, I will send you the specification data. we are looking forward to the cooperation with you ! Have a nice day Best regards Lisa Li Email:***** MSN:***** MP:86-13791918689