Typically, solar glass used in crystalline silicon solar panels is 3.2mm thick.
The thickness of solar glass is a critical factor in the performance and durability of a solar panel. Here's a breakdown of why this thickness is standard and important:
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Protection: The glass layer acts as the first line of defense for the delicate solar cells underneath, protecting them from harsh weather conditions like rain, hail, snow, and extreme temperatures. The 3.2mm thickness provides adequate protection against these elements.
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Light Transmission: Solar glass needs to be highly transparent to allow maximum sunlight to reach the solar cells. While thicker glass can offer greater protection, it can also reduce the amount of light transmitted. 3.2mm offers a good balance between protection and light transmission.
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Adhesion: The surface of solar glass is deliberately made rough. This roughness is essential for the lamination process, where EVA (ethylene-vinyl acetate), a bonding agent, adheres the glass to the solar cells. A completely smooth glass surface wouldn't allow for adequate adhesion, leading to delamination and panel failure over time.
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Material Cost & Weight: While thicker glass would be more durable, it would significantly add to the weight and cost of the solar panel. A 3.2mm thickness offers an optimal balance between performance, durability, weight, and cost-effectiveness.
In summary, the 3.2mm thickness of solar glass is a carefully engineered standard that ensures optimal performance, protection, and longevity for crystalline silicon solar panels.
