Materials
EVA Encapsulant
Summary
Ethylene-vinyl acetate plastic film that laminates solar cells between glass and backsheet.
Detailed Explanation
EVA (ethylene-vinyl acetate) is the standard encapsulant material used to bond solar cells between the front glass and back sheet. High-quality EVA is essential for long-term module reliability β poor EVA causes delamination, PID degradation, and moisture ingress. Premium alternatives: POE (polyolefin elastomer) for higher reliability in humid climates, used in most TOPCon and HJT modules. EVA cost is 3-5% of module price.
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