International Journal of Engineering and Information Systems (IJEAIS)   Year: 2019 | Volume: 3 | Issue: 12 | Page No.: 1-6 Degradation Influence of Ethylene Vinyl Acetate Copolymer (EVA) in Photo-Voltaic Modules: The Reason and Effect. A Review Mohammed A. Akraa, Ali S. Hassan, Mohammed Jawad H. Kadhim Abstract: The photovoltaic modules prone to many environmental and weather aging factors promote induced degradation as a significant reason in shortening their lifetime. The mechanisms of the natural deterioration have been addressed for the ethylene-vinyl acetate to determine its stability and consequently to support the reliability of the silicon photovoltaic modules. This requires knowing in detail the operation conditions of these modules and their relationship with the degradation factors like moisture, UV radiation, and heat at the conditions of the PV module's functions. The main target of this study is to review the written literature about the degradation of EVA encapsulation which promotes the performance loss of the PV units. The deleterious effects on the EVA like photo-degradation, delamination, moisture, bubble formation, their link with the polymer properties are discussed approaches in this review.