A lifetime prediction of PV encapsulant and backsheet via time temperature superposition principle

To ensure the longevity and reliability of solar modules, the PV industry has adopted a series of accelerated aging tests. Among these tests, damp heat test performed at 85°C, 85% relative humidity for 1000 hrs provides important information on the degradation of encapsulant and backsheet materials. The purpose of this work is to define the proper accelerated test conditions that represent 25 years of real field life exposure of these materials.