The 2024 Calgary hailstorm caused over $2.8 billion in damages, with a significant impact on solar panels. Despite their durability, this event highlights the need for additional measures to protect solar systems from severe weather and prevent costly repairs.
The 2024 Calgary hailstorm left an indelible mark on the city, resulting in over $2.8 billion in insured claims, setting a new record for damage.
This devastating storm, one of the worst in recent memory, had widespread impacts, including significant damage to residential and commercial solar panel systems.
In this blog, we’ll talk about what we can learn from this event and how you can protect your solar panels in Calgary against future hailstorms.
Calgary Hailstorm 2024 Overview
The recent hailstorm in Calgary ranks among the most intense in the city’s history, with golf ball-sized hailstones and strong winds causing widespread damage. The storm lasted several hours, heavily impacting neighborhoods in both the northwest and southeast.
With billions at stake in insured damages, it is the second-largest hailstorm in Canadian history. Residents faced shattered windows, damaged vehicles, and property losses, including significant damage to solar panels.
One northwest resident described the experience as “terrifying” as hailstones shattered his solar panels and dented his roof.
Repair costs are substantial, with estimates reaching tens of thousands of dollars.
The overwhelming number of claims has led to delays in repair services, emphasizing the importance of early preventive measures. Recovery efforts continue, with insurance claims soaring and local communities rallying to rebuild.
The Truth About Solar Panels And Hailstorms
A hailstorm occurs when updrafts in thunderstorms lift raindrops into the cold atmosphere, where they freeze and form solid ice balls known as hailstones. These hailstones grow as they collide with additional raindrops, eventually falling to the ground when they become too heavy.
In Calgary, hailstorms are common. The city is part of Canada’s “Hail Alley,” experiencing an average of five hailstorms annually.
While many hailstones are small, some can reach the size of golf balls. The largest recorded hailstone in Alberta measured 12.3 cm, falling at speeds of up to 172 km/h.
You might assume that solar panels, being durable, are entirely hail-resistant. Technically, they are designed to withstand most hailstorms.
Standard solar panels, made with tempered glass, can typically resist hailstones up to 25 mm in diameter, falling at speeds of around 80 km/h (50 mph), making them resilient against substantial impacts.
The most resilient panels, those with UL 61730 or IEC 61730 ratings, can withstand hailstones as large as 3 inches, traveling at speeds of 88 mph.
While such panels may still develop minor “microcracks,” they typically continue to perform efficiently.
Research from the National Renewable Energy Laboratory (NREL) shows that the likelihood of hail causing damage to solar panels is as little as 0.1%, indicating that while the chances are low, it’s not entirely impossible.
More severe hailstorms, such as the one that occurred last August, can bring larger hailstones capable of causing damage since not all solar panels are equally made.
How Hailstorm-damage Affects Solar Panels
Severe hailstorms can chip, crack, or even break solar panels, significantly reducing their efficiency. These cracks act like miniature shades, blocking sunlight from being absorbed, which lowers energy output.
A major concern with hailstorm damage to solar panels is the shortened lifespan of the system. Cracks allow moisture, water, and debris to infiltrate the panel’s surface, potentially damaging internal components.
This can lead to corrosion and electrical issues over time, ultimately decreasing the overall performance and durability of the solar array.
In some cases, hail damage can create “hot spots” on the panel. These form around cracks and cause localized overheating, which may lead to malfunctions or, in extreme cases, fires.
Regular maintenance and inspections are essential to identify and repair these issues before they worsen. Always be cautious when conducting DIY inspections due to safety concerns related to height.
Even if the outer glass of a solar panel appears intact after a hailstorm, the internal components may still be damaged. Microcracks, often too small to see initially, can develop in the silicon layer of the panel.
While these microcracks may not cause an immediate loss in power generation, they often lead to a gradual decline in efficiency over time, with noticeable drops in output occurring within months or years after the hail event.
Cracked panels also increase the risk of malfunction, as moisture and debris can become trapped inside. As water seeps through the cracks, the chances of internal damage or hot spots forming rise.
Although not all visible damage will drastically affect performance, addressing any surface flaws promptly is crucial to avoid further degradation.
How To Protect Your Solar Panel Investment Against Hailstorm
While hailstorm solar panels are designed to withstand impact, taking additional precautions can further protect your investment from severe weather events.
Put Temporary Coverings
One option for hailstorm protection is temporary hard-shell or padded fabric covers.
These can shield panels during storms but must be manually placed and removed, which can be impractical for larger commercial arrays.
Every minute the panels are covered also reduces electricity generation, making this solution less ideal for large installations.
Understand Solar Panel Warranties
Most solar panel warranties don’t cover hail damage and those that do often have limited coverage.
Consider investing in solar panels that are UL 61730 or IEC 61730 certified.
These ratings ensure better resistance to hail damage, making them a solid option for protecting your solar investment.
Ensure the Right Panel Angle and Orientation
The angle and orientation of your solar panels can influence their vulnerability to hailstorms. Research suggests that solar panels positioned at low angles, especially on flat roofs, may experience greater damage during a hailstorm.
Optimal panel angles—typically between 30º and 45º in the northern hemisphere—can help manage precipitation, allowing snow, rain, or hail to slide off, reducing the risk of damage and quickly restoring peak electricity production.
Add Protective Coatings
Another option to increase hail resistance is applying a layer of methacrylate, a spray-on protective coating.
However, this should only be done by a professional to avoid impacting the panels’ efficiency. Consult your solar provider before applying any coating to ensure it won’t void your warranty.
Upgrade to Higher Quality Panels
If a hailstorm has damaged most of your solar panels, it’s crucial to reassess the quality of your chosen system. Higher-quality panels typically come with an IP68 rating, meaning they are both waterproof and dustproof, providing extra protection against harsh weather conditions.
If your current system uses glass-foil panels, consider upgrading to glass-glass panels for your next investment. These panels feature a thicker layer of tempered glass, which offers superior resistance to hail impact.
Additionally, ensure that your solar system is certified under IEC 61215. This certification guarantees that the panels can withstand hailstones up to 25 mm in diameter, falling at speeds of 23 m/s, meeting class 2 hail resistance standards.
FAQs
Can insurance cover hail damage to solar panels in Calgary?
Yes, but coverage depends on your insurance policy. Many standard policies cover weather-related damage, including hail, but it’s essential to review your specific coverage details.
How often should solar panels be inspected after a hailstorm?
Solar panels should be inspected immediately after a severe hailstorm and regularly thereafter to check for microcracks or other hidden damage.
Are solar panels in Calgary hail-resistant?
While many solar panels are designed to withstand some hail, extreme storms like the 2024 Calgary event can still cause damage. Upgrading to stronger materials and ensuring optimal installation can enhance resilience.
What is the best way to prevent hail damage to solar panels in hail-prone areas like Calgary?
Opting for high-quality, impact-resistant panels, ensuring proper installation angles, and considering protective coatings can minimize the risk of hail damage.
Do solar panel warranties cover hail damage?
Most warranties do not cover hail damage unless explicitly stated. It’s important to check with your installer or manufacturer for warranty specifics related to weather damage.
If there are no obvious cracks, how do I know if hail has harmed my solar panel system?
Even without visible cracks, hail can cause microcracks that affect efficiency. A professional inspection or a voltage check can help identify hidden damage.
What should I do if my solar panels were damaged in a hailstorm?
If you suspect hail damage, contact a professional for an inspection. They can assess the extent of the damage and recommend repairs or replacements if necessary.
Secure Your Solar Investment With The Experts
When it comes to protecting your home or business from harsh weather, choosing the right solar panel installer is crucial.
At Panel Upgrade Experts, we specialize in premium solar panels designed to not only deliver exceptional performance but also seamlessly integrate with your building’s aesthetic.
Whether you need advice on the latest photovoltaic (PV) technology or a quote on solar panels in Calgary, we’re here to help.
Our team will tailor a solar system that meets your specific needs, ensuring long-term durability against unpredictable weather, including hailstorm solar panels built to last.
We don’t just install panels – we provide ongoing support to quickly address any potential hail damage and maintain your system’s efficiency.
Why choose Panel Upgrade Experts?
- Premium solar panels built to withstand Calgary’s harsh hailstorms
- Tailored solar designs for your unique energy needs
- Reliable support before, during, and after installation
Don’t wait until the next hailstorm hits. Contact us now for a consultation and take the first step toward a powerful, weather-resistant solar solution!
Bottom Line
The 2024 Calgary hailstorm was one of the most devastating in the city’s history besides wildfires, causing over $2.8 billion in damages, including significant harm to residential and commercial solar panels.
This event highlights the vulnerability of solar systems to extreme weather, even in areas accustomed to regular hailstorms.
Although most solar panels are built to withstand moderate hailstorms, Calgary’s storm shows that extra precautions are essential to prevent costly repairs, reduce efficiency loss, and extend the system’s lifespan.
The storm serves as a reminder of the importance of investing in durable panels, such as those with UL 61730 or IEC 61730 certification. Proper panel installation, particularly the angle, also plays a critical role in reducing exposure to hail and other elements.
Taking preventive measures like regular inspections, upgrading to glass-glass panels, and applying protective coatings can further safeguard your investment.
