A solar module though looks simple, is a combination of highly engineered materials working in tandem to harness energy. One such component is the Ethylene Vinyl Acetate (EVA) encapsulant. This transparent layer of plastomer forms a protective layer over and under the solar cells preventing water, dirt and other external impurities from contaminating the cells and at the same time ensures optical transmissivity and electrical isolation. These encapsulants ensure that the module can be used outdoors for over 25 years without significant degradation.