1. our warranty is three years, any questions please contact with us. 

2. for big wind turbine generator, we use polywood package. 

3. for small wind turbine generator, we use carton and foam package.

 Nanjing Oulu Electric Transmission Co., Ltd., which was founded in 1996, began to manufacture small and medium sized wind turbine

generator in early 2007. On the basis of Torque motor and inverter, we have produced them by the end of 2008. We have the capacity

to produce wind turbine generators of 200W, 300W, 400W, 500W, 1000W, 2000W, 3000W, 5000W, 10KW, 20KW, and 30KW.

Currently, we have passed ISO9001 international management system certificate, and we are CE certified. We manufacture motors,

blades, flanges, and stand towers. We also offer components for companies in the same field .