What is Hail?
Hail is ice that forms in thunderstorms when raindrops are lifted into freezing cold air, freeze, and build layers of ice. Once heavy enough, hailstones fall to the ground due to gravity. Their speed depends on factors like size, wind, and how much they’ve melted.
Solar Panels and Hail
Can Hail Damage Solar Panels?
High-quality solar panels are equipped with a durable layer of tempered glass, designed to withstand significant impacts. Also known as safety or toughened glass, it is created through thermal or chemical processes. This tough glass protects the panels from moisture damage, helps them endure extreme temperatures, and ensures long-lasting performance by resisting wear and ageing. While they are designed to withstand normal weather conditions, including small to medium-sized hailstones, large or very dense hail can cause cracks or break the glass surface of solar panels, affecting their efficiency and lifespan.
How Common is Hail Damage to Solar Panels?
Hail damage to solar panels is relatively rare thanks to the durability and design of modern solar panels, which are tested to withstand hail of various sizes, typically greater than 1 ¾" or 44 mm diameter, at speeds of around 50 miles per hour. However, the likelihood of damage can increase with larger hailstones that exceed these standards.
Impact of Hail on Solar Panels
The size and speed of hailstones, angle of impact, and installation angle of solar panels are critical factors that determine the extent of damage caused by hail. High-quality materials and robust construction of solar panels can significantly mitigate the risk of hail damage. However, despite these precautions, common types of hail damage to solar panels include micro-cracks in solar cells, broken glass surfaces, and damaged frames and mounting systems. SolarReviews states that while cracks from hailstorms won’t completely stop solar panels from working, they can reduce efficiency. Performance decline depends on the size of the crack and how quickly it’s detected
How to Protect Solar Panels From Hail
What to Do If Hail Damages Your Solar Panels
If you suspect that your solar panels have been damaged by hail, the first step is to safely inspect the panels for visible damage, such as cracks or shattered glass, and then contact your solar panel provider or insurance company. It’s important to document the damage with photos and note the date of the hailstorm for your records and potential insurance claims.
Protecting Your Solar Panels from Hail Damage
To protect your solar panels from hail damage, consider installing protective covers or guards specifically designed for hail protection, although these might not be practical for all installations. Choosing solar panels certified for higher hail resistance, ensuring proper installation angle and positioning for natural protection, and having comprehensive insurance coverage are also effective strategies.
Are There Hail-Resistant Solar Panels?
Yes, there are solar panels that are designed to be more resistant to hail damage, certified with ratings like UL 61730 or IEC 61730. These panels undergo rigorous testing, including being subjected to hailstones of various sizes at high velocities. Look for panels that meet or exceed industry standards for hail resistance, such as those certified to withstand hail of 1 inch in diameter at 50 miles per hour, to ensure better durability against hail impact.
How Can You Protect Your Solar Panels from Hail Damage?
To protect your solar panels from hail damage, consider installing protective covers or guards specifically designed for hail protection, although these might not be practical for all installations. Choosing solar panels certified for higher hail resistance, ensuring proper installation angle and positioning for natural protection, and having comprehensive insurance coverage are also effective strategies.
Are There Hail-Resistant Solar Panels?
Yes, there are solar panels that are designed to be more resistant to hail damage, certified with ratings like UL 61730 or IEC 61730. These panels undergo rigorous testing, including being subjected to hailstones of various sizes at high velocities. Look for panels that meet or exceed industry standards for hail resistance, such as those certified to withstand hail of 1 inch in diameter at 50 miles per hour, to ensure better durability against hail impact.
Testing and Standards for Hail Resistance
The solar industry has developed specific testing procedures and standards for hail resistance to address concerns about hail damage. These tests typically involve propelling ice balls at solar panels at high velocities to simulate hailstorm conditions. The aim is to ensure that solar panels can withstand impacts from hailstones of various sizes and speeds without sustaining significant damage. Industry standards for hail-resistant solar panels have been established based on the outcomes of these tests, with certifications awarded to panels that meet or exceed these standards. Such certifications are crucial for consumers and installers in selecting panels suitable for regions prone to severe hailstorms.
In conclusion, while hail damage to solar panels is relatively rare, it is still a concern for potential and current solar panel owners. Taking appropriate measures to protect solar panels from hail damage and choosing hail-resistant solar panels can help mitigate the risk of damage and ensure the longevity and effectiveness of solar power as a sustainable energy source.
Testing and Standards for Hail Resistance
The solar industry has developed specific testing procedures and standards for hail resistance to address concerns about hail damage. These tests typically involve propelling ice balls at solar panels at high velocities to simulate hailstorm conditions. The aim is to ensure that solar panels can withstand impacts from hailstones of various sizes and speeds without sustaining significant damage. Industry standards for hail-resistant solar panels have been established based on the outcomes of these tests, with certifications awarded to panels that meet or exceed these standards. Such certifications are crucial for consumers and installers in selecting panels suitable for regions prone to severe hailstorms.
In conclusion, while hail damage to solar panels is relatively rare, it is still a concern for potential and current solar panel owners, affecting the financial investment and long-term viability and efficiency of solar energy systems. Taking appropriate measures to protect solar panels from hail damage and choosing hail-resistant solar panels can help mitigate the risk of damage and ensure the longevity and effectiveness of solar power as a sustainable energy source.