November 30, 2011. China will double a surcharge on power sales to 0.008 yuan per kilowatt hour to subsidize renewable power generation. The revenue from an existing surcharge, at 0.004 yuan/kWh, is not enough to cover the difference that power grid operators pay for electricity output from renewable power developers. Grid feed-in tariffs for solar and wind power are higher than the rates for coal-fired power, the staple of China's electricity sources.