Power shortages and blackouts across China have led to increased rationing in recent months. While some manufacturers are using diesel generators to keep up with production, this access to power comes at a price. Generators run at twice the cost of power produced from the electric grid. The shortage will undoubtedly impact the price of Chinese exports.
Source: http://www.chinadaily.com.cn/usa/epaper/2011-06/10/content_12672091.htm