The encapsulant is an integral part of a solar PV module, commonly referred to as a solar panel. Among other functions, it provides cushioning to the PV cells and binds them to the top surface (glass) and rear surface (glass or backsheet) of the module. Over the years, two popular materials, EVA (Ethyl Vinyl Acetate) and POE (Polyolefin Elastomer) , have been widely used for PV encapsulation. However, due to certain limitations associated with each material, encapsulation material suppliers have engineered a new solution called EPE (EVA-POE-EVA) encapsulant – a multilayer construction that combines the best properties of both materials. In this article, we will explore the properties of EVA and POE encapsulants and how the EPE encapsulant addresses their shortcomings, as well as the increasing applications of EPE in modern cell architectures. Limitations of EVA and POE EVA is a thermoplastic polymer with superior adhesive properties and excellent optical transmission. However, it al
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