EVA encapsulant is a thin sheet with a large effect on module yield: it optically couples the cell to the world and mechanically locks the stack together. Visual defects and slow power loss often trace back to how that film was stored, laminated, or formulated. This article covers reliability built in the laminator, matching the grade to climate and cell type, and why EVA remains central even as POE and EPE take share in more demanding designs. The full technical article is in the PDF below.