China is expected to overtake Germany to become the world's largest solar power generating country this year, said Zhang Xiaoqiang, deputy director of the National Development and Reform Commission, on Wednesday at the Summer Davos Forum.

The nation's installed photovoltaic power capacity as of Dec 31 was 6.5 million kilowatts, according to the China Electricity Council. China will add at least 10 million kW of capacity every year from 2013 to 2015, the State Council, the cabinet, has said.

The rapid growth will enable China to have a total installed solar capacity of 35 million kW by 2015.