Yingli manufactures polysilicon, ingots, wafers, cells, and modules under one roof. This ensures strict quality control on the entire production process. Due to our heavy investments in state-of-the-art manufacturing equipment as well as our R&D initiatives, the company have achieved a high degree of automation throughout our entire production process.
The products have passed stringent international certification testing standards such as IEC, TÜV and UL, and ISO 9001 standards. The renowned durability and sustainable performance of the roducts are also backed by the 25-year limited power warranty.