SPLTRAK Abstract Submission
Transmittance degradation analysis of desert exposed UV transparent PV module encapsulants
Baloji Adhothu, Sagarika Kumar, Abrar Al Moosawi, Jim Joseph John, Omar Albadwawi, Gerhard Mathiak, Vivian Alberts
Dubai Electricity and Water Authority (DEWA) Research and Development Center, Dubai, United Arab Emirates

Polyolefin elastomer (POE) is an alternate encapsulant to the PV industry's commonly used ethylene-vinyl acetate (EVA). Encapsulant discoloration results in the reduction of transmittance. Using an external heating system, POE and EVA glass-to-glass laminates were exposed at DEWA outdoor facility at 70, 80, 90, and 110 ℃. for 0, 30, and 60 days. The changes in optical transmittance were recorded. After aging of 60 days, EVA has shown slightly higher (92-93%) transmittance than the POE ((89-91%). Thermal properties were measured with the differential scanning calorimeter. This study can motivate researchers to predict the activation energy for the transmittance degradation for different encapsulant films.