Yingli Green Energy's PV Modules Pass Blowing Sand Test

Yingli Green Energy Holding Company Limited

("Yingli Green Energy" or the "Company"), the world's largest vertically integrated photovoltaic ("PV") manufacturer, which markets its products under the brand "Yingli Solar," today announced that the Company's PV modules have passed the Blowing Sand Test ("the Test") conducted in SGS's Solar Test House, demonstrating that the Company's PV modules can keep an outstanding performance even in harsh conditions such as in the desert. (Logo: http://www.prnasia.com/sa/2012/04/01/20120401160439160364.jpg ) To determine the effects on solar panels of dust and sand in air, SGS's Solar Test House simulates the erosion effects of high-velocity sand particles within dust chambers. Pulses of compressed air are blown through a manifold located in the bottom of a collection trough, forcing dust up and over the solar modules. The Test contains maximum power determination, the insulation test, and the wet leakage current test. "We're pleased to see our modules passed SGS's Blowing Sand Test," said Dr. Dengyuan Song, Chief Technology Officer of Yingli Green Energy. "This test result once again proved the high quality of our products attributable to our continuous optimization of our manufacturing technologies and unwavering commitment to high quality. We believe the test