Solar Panels and Hail: How Durable Are They Really?

If you live in Texas, Colorado, the Midwest, or anywhere in Tornado Alley, hail is a real concern. Golf ball-sized hail can crack car windshields and dent metal roofs. So what happens when it hits your $25,000 solar array?

The answer is more reassuring than most people expect — but not without caveats. Here is what the testing shows, what real-world storms have revealed, and how to protect your investment.

How Solar Panels Are Tested for Hail

All solar panels sold in the US must pass the IEC 61215 standard, which includes a hail impact test. The test specification:

• Ice ball size: 25mm (approximately 1 inch diameter)
• Impact velocity: 23 meters per second (about 51 mph)
• Number of impacts: 11 strikes at specified locations across the panel
• Result required: No visible damage, no power output reduction beyond tolerance

This means every panel on the market has been certified to withstand 1-inch hail traveling at 51 mph. For context, 1-inch hail is the size of a quarter — the most common hail size in US storms.

But storms can produce much larger hail. The IEC standard is a minimum. Hailstones from severe thunderstorms can reach 2-4 inches (golf ball to softball size) and travel at 70-100+ mph. These are beyond the standard test specification.

What Happens in Real Hailstorms

The Good News

In the vast majority of hailstorms, solar panels survive without damage. The tempered glass covering solar cells is 3.2mm thick — the same glass used in car windshields (though structured differently). This glass is designed to absorb impact without shattering.

Real-world data from NREL (National Renewable Energy Laboratory): A study of over 50,000 solar installations found that fewer than 0.1% experienced hail damage requiring repair or replacement. Solar panels are significantly more hail-resistant than most building materials.

After the 2017 Denver hailstorm (one of the most destructive in Colorado history), the majority of residential solar panels in the affected area survived without damage — while cars, skylights, and conventional roofing materials were destroyed.

The Bad News

Extreme hail events can damage panels. In April 2024, a severe hailstorm in the Texas Panhandle damaged the Fighting Jays Solar Farm — a utility-scale installation that lost a significant percentage of panels to 3-4 inch hailstones.

For residential systems, the risk is lower (smaller target area, residential panels are often higher-quality), but not zero. Hail damage typically manifests as:

• Micro-cracks in cells: Not visible to the naked eye but reduce power output over time. Detectable through production monitoring (your system produces less than expected).
• Visible glass fractures: The tempered glass cracks in a spider-web pattern but does not fall apart (tempered glass holds together when broken). The panel may still produce power at reduced efficiency.
• Complete breakage: Rare, only from extremely large hail (3+ inches). Panel must be replaced.

What Your Warranty Covers

Manufacturer Product Warranty (Typically 12-25 Years)

This covers defects in the panel itself, including workmanship and materials. Most major manufacturers (REC, Qcells, Canadian Solar, Panasonic) warrant panels for 25 years.

Does it cover hail damage? Generally no. Manufacturer warranties cover defects in production, not damage from external events. Hail is considered an "act of nature" — similar to how a car manufacturer does not cover windshield damage from road debris.

Exception: Some premium manufacturers offer more comprehensive warranties that may include weather damage. Read the fine print.

Homeowner's Insurance (Your Primary Protection)

Your homeowner's insurance policy is the primary financial protection against hail damage to solar panels.

What to verify with your insurer:

1. Are solar panels explicitly covered? Most policies cover them as "attached structures" or improvements to the property, but confirm.
2. What is the coverage limit? Ensure the coverage amount reflects the replacement cost of your panels (not depreciated value).
3. What is the deductible? Hail claims are subject to your policy deductible — which may be a separate, higher deductible for wind/hail in some states (especially Texas, Colorado, and Oklahoma).
4. Do you need a rider? Some insurers require a specific endorsement (rider) for solar panel coverage. Ask before you need it.

Filing a claim: If your panels are damaged by hail, document the damage with photos, check your system's production data for output reduction, and file a claim with your insurer. Most claims are straightforward if you have verified coverage beforehand.

How to Minimize Hail Risk

1. Choose Hail-Rated Panels

Some panels are tested beyond the IEC minimum:

• IEC 61215 standard: 1-inch hail at 51 mph (minimum, all panels pass this)
• UL 61730 enhanced: Some panels are tested with 1.5-inch or 2-inch hail
• MIL-STD-810G: Military-grade testing that some manufacturers reference

Ask your installer what hail testing has been done beyond the IEC minimum.

2. Panel Tilt Angle Matters

Panels installed at a steeper angle (30-40 degrees) shed hail better than panels installed nearly flat (10-15 degrees). The angle causes hail to glance off rather than impact directly. If you are in a hail-prone area, discuss tilt angle with your installer.

3. Monitor Production

After any significant hailstorm in your area, check your solar monitoring app (Enphase, SolarEdge, Tesla). Compare daily production to the previous week and to the same period in prior years. A sudden production drop after a storm may indicate micro-crack damage not visible from the ground.

4. Consider Hail Guards (For High-Risk Areas)

Hail guards are protective screens or mesh that mount above solar panels to absorb hail impact. They are not common in residential installations but are used in some commercial and agricultural settings in extreme hail zones (western Texas, eastern Colorado, Oklahoma).

Trade-off: Hail guards reduce production by 5-10% due to partial shading. Whether the protection is worth the production loss depends on your local hail frequency and severity.

The Risk in Perspective

| Threat | Likelihood of Panel Damage |

|--------|--------------------------|

| 1-inch hail (quarter-size) | Very low — panels designed to withstand this |

| 2-inch hail (golf ball) | Low — most panels survive, some micro-cracking possible |

| 3-inch hail (baseball) | Moderate — visible damage likely, some panels need replacement |

| 4+ inch hail (softball) | High — significant damage likely, insurance claim territory |

| No hail (most of the US most of the time) | Zero — this is the most common scenario |

For the vast majority of solar homeowners, hail damage will never happen. The combination of tested panels, homeowner's insurance, and low probability makes hail one of the least significant risks in a solar investment — far less concerning than choosing the wrong installer, signing a bad contract, or not monitoring your system's performance.

Key Takeaways

• All solar panels are tested to withstand 1-inch hail at 51 mph (IEC 61215 standard)
• Fewer than 0.1% of installations experience hail damage requiring repair
• Homeowner's insurance is your primary financial protection — verify your panels are covered before a storm
• After any hailstorm, check your monitoring app for production drops indicating micro-crack damage
• Panel tilt angle affects hail resistance — steeper is better for deflecting hail
• Extreme hail (3+ inches) can damage panels, but this is rare outside of Tornado Alley
• Hail risk is far less concerning than installer risk, contract risk, or maintenance neglect

The best protection against hail risk is installing quality panels from reputable manufacturers and ensuring your homeowner's insurance covers solar before the first storm of the season — not after.

Related articles:

• Do Solar Panels Increase Home Value? (2026 Data)
• What Happens to Your Solar Panels During a Power Outage?
• What Happens to Solar Panels When You Sell Your House?

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