Yingli Green Energy has upgraded existing warranties for both its mono and multicrystalline products as well as introduced a linear-based extended warranty that guarantees power output for each year of a 25-year warranty period. In addition, its limited product warranty has been increased from 5 to 10-years for all of its PV module products and is now inline with the majority of mainstream module manufacturers. The new warranties are valid for PV modules shipped from its plants from October 1st, 2011.
Yingli Green also said that its monocrystalline Panda PV modules had a standard power performance warranty that guarantees 98% of nameplate power for the first year, 92% of nameplate power for 10 years, and 82% of nameplate power for a period of 25 years.
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In respect to its multicrystalline PV modules, a standard power performance warranty guarantees 91.2% of nameplate power for 10 years, and 80.7% of nameplate power for a period of 25 years.