Yingli Green Energy Holding Company Limited (Yingli Solar) manufactures solar panels. Its offerings cover the entire photovoltaic (PV) value chain, from crystalline polysilicon ingots and wafers, PV cells and PV modules to the manufacture and installation of PV systems. The company markets its products under the Yingli and Yingli Solar brands and sells them to PV system integrators and distributors across the world. Yingli Solar distributed solar PV modules of capacity more than 26 GW.

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Yingli Solar carries out research and development (R&D) activities to improving its manufacturing technologies and reduce manufacturing costs without any effect on product quality. The company’s focus areas include wafer cutting techniques, including improving the surface and internal physical characteristics of wafers to decrease the wafer breakage rate and increase the wafers production from each ingot and wafer thickness; and improving ingot casting and crystal growing processes to reduce the time required for ingot formation, increase ingot output, and reduce the cost of raw materials. The company has received 54 national, provincial, and municipal awards for its contribution in science and technology progress. It has 2,039 national patent applications.