LIFE TIME ESTIMATE OF SOLAR MODULES POLYMERIC BACKSHEETS

摘要

A new backsheet, based on cost effective polyolefins was developed for solar modules. Polyolefins areknown to withstand harsh environmental conditions. This polyolefin is especially modified for long term durability.To perform a life time estimate, intensive and long-term weathering tests were performed. The polyolefin backsheetwas tested under harsh temperature and UV conditions in the xenon weatherometer and QUV-A. In parallel, heataging was done at temperatures of 110°C to 170°C. An Arrhenius extrapolation of the time to partial loss of propertywas done to estimate a service life time. The calculated mean lifetime of the polyolefin based backsheet in a standardsolar module can be more than 50 years in Germany. The weathering is ongoing.