Quick Answer
Monocrystalline panels tend to perform slightly better than polycrystalline panels in hail. This is because monocrystalline cells have a single-crystal structure, making them less prone to cracking and breaking under impact. However, the actual performance difference in hail is relatively minor.
Hail Resistance Comparison
The primary difference in hail resistance between monocrystalline and polycrystalline panels is the crystal structure. Monocrystalline cells have a single-crystal structure, whereas polycrystalline cells are composed of multiple crystals. This single-crystal structure makes monocrystalline panels slightly more resistant to cracking and breaking under impact.
Hail Size and Panel Performance
The performance of solar panels in hail is also dependent on hail size. In areas where large hailstones (greater than 1 inch in diameter) are common, panels with tempered glass or specialized hail-resistant glass may be a better option. In such cases, the difference in performance between monocrystalline and polycrystalline panels becomes less significant.
Panel Testing and Certification
Solar panels undergo rigorous testing to ensure compliance with industry standards. In the US, for example, panels must withstand a hail impact test, where 1-inch diameter hailstones are dropped onto the panel from a height of 18 feet. Panels that pass this test are certified for use in areas prone to hail. Both monocrystalline and polycrystalline panels can meet these certification standards, but the actual performance in hail may vary depending on the specific panel model and manufacturer.
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