Quick Answer
Users report varying experiences with hail-resistant solar panels, with some panels withstanding impacts without damage, while others sustain significant damage.
Hail Resistance Testing
Hail-resistant solar panels are designed to withstand impacts from hailstones of various sizes. The International Electrotechnical Commission (IEC) test standard 61730-2-13 specifies the requirements for testing solar panels against hail impacts. The test involves shooting 1-inch (25.4 mm) diameter ice balls at the panel from 20 feet (6.1 meters) away, simulating a hailstone impact.
Manufacturer Claims vs. Real-World Performance
Some solar panel manufacturers claim that their products are hail-resistant, with some panels meeting the IEC 61730-2-13 standard. However, real-world performance can vary depending on the panel’s design, materials, and manufacturing quality. In a study, researchers found that panels with a stronger frame and more robust glass coverings performed better in hail impact tests. For example, the SunPower X-Series solar panels have a hail impact test rating of 540 mmHg (millimeters of mercury), which is significantly higher than the IEC standard.
Design Considerations for Hail-Resistant Solar Panels
When designing hail-resistant solar panels, manufacturers consider several factors, including the panel’s thickness, frame structure, and glass material. A thicker frame and more robust glass covering can provide better protection against hail impacts. Some manufacturers also use specialized glass coatings, such as tempered glass or laminated glass, which can help absorb and distribute the force of the impact. The angle of the panel’s frame and the use of reinforced mounting systems can also help reduce the risk of hail damage.
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