Solar Panels vs. Hailstorms: What You Need to Know, Solar energy has rapidly grown in popularity as a clean and cost-effective power solution for homes and businesses. But with this rise comes a common concern: Can solar panels survive hailstorms? The short answer is yes but it depends on several factors.
How Solar Panels Are Tested for Hail Damage
Most modern solar panels are built to withstand harsh weather, including hail. In fact, manufacturers conduct standardized tests simulating hail impact. These tests typically involve shooting ice balls about the size of a golf ball at 20–25 meters per second to ensure the glass can resist breakage.
However, real-world conditions can be more intense. Larger hailstones, high winds, or older/cheaper panels may still be at risk.
When Hail Becomes a Real Threat
While the tempered glass used in solar panels is quite durable, extreme hail events especially those involving hailstones larger than 2 inches in diameter can cause:
- Cracks or Shattering: Even small cracks can reduce efficiency or render the panel useless.
- Microfractures: These hairline cracks may not be visible but can lower energy output over time.
- Frame or Mounting Damage: Strong winds accompanying hail can loosen mounts or damage the panel’s frame.
How to Protect Solar Panels from Hail
- Use High-Quality Panels: Invest in panels certified under IEC 61215 standards for impact resistance.
- Install at an Angle: Panels tilted at a slant are less likely to face direct perpendicular impact from hailstones.
- Add Protective Covers: Transparent shields or mesh barriers can help absorb impact.
- Home Insurance Coverage: Ensure your homeowner’s policy includes hail damage for solar systems.
Good News: Hail Damage Is Rare
Despite the concerns, hail damage to solar panels is relatively uncommon. According to the National Renewable Energy Laboratory (NREL), out of more than 50,000 solar panel systems studied, less than 0.1% reported hail-related damage.
Final Thoughts
Hail may pose a threat to solar panels, but with smart installation choices, quality materials, and occasional inspections, the risk remains low. Solar remains a safe, long-term investment for clean energy even under stormy skies.
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