Protecting Your Solar Panels from Hail

Protecting Your Solar Panels from Hail: Comprehensive Strategies for Safety and Efficiency

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In regions like Belgium and beyond, where unpredictable weather and severe hailstorms are not uncommon, safeguarding solar panels against potential damage is crucial. Solar panels, designed to endure harsh conditions, can still fall victim to the destructive force of hail. This article combines essential insights and strategies from two comprehensive guides, offering a robust approach to protecting your solar investment from hail damage.

Understanding the Resilience of Solar Panels

Solar panels are generally robust, equipped with tempered glass and other durable materials to withstand weather onslaughts, including hail. However, severe hailstorms with large hailstones can still pose a threat. To ensure maximum protection, it’s vital to understand the international standards for solar panel resistance and select panels that meet these rigorous criteria.

International Standards for Solar Panel Resistance

The International Electrotechnical Commission (IEC) sets global standards for solar panel durability:

  1. IEC 61215: Targets crystalline silicon photovoltaic modules, ensuring they can endure hailstones up to 1.25 cm in diameter at speeds of 140 km/h.
  2. IEC 61646: Applies to thin-film photovoltaic cells like cadmium telluride (CdTe), offering similar protection.
  3. IEC 61730: Extends to connections, safeguarding against electrical shocks and mechanical stress.

Choosing the Right Panels

Opt for panels rated UL 61730, UIC 61730, or IP68. These ratings indicate the panels’ ability to withstand significant hail impact and ensure they are waterproof and dustproof. Borosilicate glass, often used in these panels, is known for its shock-absorbing properties and is ideal for hail protection.

Proactive Measures for Hail Protection

Proactive Measures for Hail Protection
  1. Protective Covers: Use hard shell covers for the best protection during forecasted hailstorms. Remember, these covers block sunlight, so they should be removed after the storm.
  2. Methacrylate Layer: A spray-on protectant that allows solar panels to continue functioning while offering protection. Apply carefully to avoid reducing efficiency.
  3. Wire Mesh: Install a wire gauge mesh around the panels. This barrier allows sunlight through while protecting against hail.
  4. Adjust Panel Angles: Use automated adjusters to change the panels’ angles, minimizing hail impact while maintaining energy efficiency.
  5. Regular Inspections: Check for and repair minor damages to prevent them from worsening during hailstorms.
  6. Insurance and Warranties: Ensure your homeowner’s insurance covers hail damage to solar panels. Understand the manufacturer’s warranty, which might not cover weather-related damage.
  7. Weather Awareness: Stay informed about incoming weather to take timely protective actions.
  8. Hail Netting: Similar to wire mesh, hail netting can be used to cover solar panels. This specialized netting is designed to absorb the impact of hailstones, reducing the risk of damage. It’s lighter than wire mesh and can be easier to install and remove.
  9. Anti-Hail Photovoltaic Films: Some manufacturers offer anti-hail films specifically designed for solar panels. These films add an extra layer of protection against hail while maintaining the panel’s ability to absorb sunlight efficiently.
  10. 1Automated Retractable Shields: For areas with frequent severe hailstorms, consider installing automated retractable shields. These can be programmed to cover the solar panels automatically when a hailstorm is detected.
  11. Elevated Mounting: Elevating the angle of the solar panels more steeply can help reduce the impact force of hailstones. While this might slightly affect the solar efficiency depending on the sun’s angle, it can be a good compromise in hail-prone areas.
  12. Structural Reinforcements: Strengthening the frame and mounting system of the solar panels can provide additional resilience against the impact of hail. This might involve using more robust materials or additional supports.
  13. Vibration Dampers: Installing vibration dampers can help absorb the shock and reduce the damage caused by hail impact. These dampers can be particularly useful in minimizing the risk of micro-cracks in the solar cells.
  14. Landscaping and Natural Barriers: Strategically placed trees or other landscaping features can serve as natural barriers to hail. However, be mindful of not obstructing sunlight to the panels.
  15. Regular Cleaning and Maintenance: Keeping solar panels clean and well-maintained can help them withstand the impact of hail better. Dirt and debris can create weak spots where hail can cause more damage.

Post-Hailstorm Actions:

  1. Documentation for Insurance Claims: In the event of damage, document everything with photos and detailed notes. This documentation can be crucial for insurance claims or warranty support.
  2. Temporary Protective Measures: If immediate repair isn’t possible, apply temporary protective measures like patching cracks or covering the damaged area to prevent further damage until professional repairs can be made.
  3. Implementing these additional measures can significantly enhance the protection of your solar panels against hail damage, ensuring their longevity and efficiency.


While hailstorms pose a real threat to solar panels, adherence to international standards and proactive protective measures can significantly reduce the risk of damage. By choosing the right panels, employing protective strategies, and staying informed, you can safeguard your solar investment against even the most severe weather challenges. As we navigate the realities of climate change, these practices become increasingly vital for the longevity and efficiency of solar energy systems.

Q&A: Protecting Solar Panels from Hail Damage

Q1: How effective are solar panels in withstanding regular hailstorms?

A1: Solar panels are generally very effective in withstanding regular hailstorms. Most are equipped with tempered glass and durable materials designed to endure typical weather conditions, including small to medium-sized hail.

Q2: What international standards should I look for when choosing hail-resistant solar panels?

A2: Look for solar panels that meet IEC standards such as IEC 61215 for crystalline silicon modules, IEC 61646 for thin-film photovoltaic cells, and IEC 61730 for overall safety, including resistance to mechanical stress like hail.

Q3: Can protective covers be used to safeguard solar panels during hailstorms?

A3: Yes, protective covers, especially hard shell covers, can be used to safeguard solar panels during hailstorms. However, they block sunlight, so they should be removed after the storm to resume normal operation.

Q4: Is there a way to protect solar panels without obstructing their energy collection?

A4: Yes, applying a methacrylate layer is a method that protects the panels without obstructing energy collection. This spray-on protectant forms a protective layer while allowing the panels to function normally.

Q5: How does adjusting the angle of solar panels help protect against hail damage?

A5: Adjusting the angle of solar panels can minimize the impact of hailstones by reducing the direct hit surface area. Automated adjusters can be used to change the panels’ angles to an optimal position during hailstorms and reposition them afterward for energy efficiency.

Q6: What should I do if my solar panels are damaged by a severe hailstorm?

A6: If your solar panels are damaged by a hailstorm, it’s important to have them assessed and repaired by professionals. They can provide necessary diagnostics and maintenance to restore the efficiency and functionality of your solar installation.

Q7: Does homeowner’s insurance typically cover hail damage to solar panels?

A7: Most standard homeowner’s insurance policies do cover hail damage to solar panels. However, it’s important to check your specific policy for any exclusions or conditions and understand the coverage details.

Q8: Are there any low-cost options for protecting solar panels from hail?

A8: Yes, one low-cost option is installing wire mesh around the panels. This mesh protects against hail while allowing sunlight through. However, it’s important to ensure the mesh is securely fastened and has the appropriate hole size to balance protection and light penetration.

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