Most commercial solar panels use glass in the 3-4mm range. Here's why: Transmittance: Around 91-93% of sunlight passes through—enough to keep efficiency high. . The optical transmittance of encapsulation materials is a key characteristic for their use in photovoltaic (PV) modules. Transmittance is important in product development, module. . those factors affect the performance of the system. Those factors include: environmental,PV system,installation cost factorsas well as other miscellaneous facto nce (AVT) is the most important reported parameter. It is a measure of how much incident solar photon flux passes through the panel or. . JIS R3106 stipulates methods for measuring and calculating visible transmittance, visible reflectance, solar transmittance, solar reflectance, and normal emittance as indices for expressing the properties of flat glass.
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