What Landowners Should Know About Solar Farm Resilience
Anyone who farms or ranches knows how quickly weather can turn. Hail, high winds and violent summer storms are part of life across much of rural America. So when a solar developer offers a 25- to 30-year lease, it’s reasonable to wonder: what happens to all that equipment when a serious storm rolls through?
The short answer is that modern solar projects are designed with severe weather in mind, and the industry has learned a lot in a relatively short time. But like most things in a long-term land lease, the details matter for solar farm storm preparedness.
Hail Is One of the Biggest Risks for Solar Farms
Of all the weather threats a solar farm faces, hail is the one that has gotten the most attention, and for good reason. A single severe hailstorm can damage thousands of panels across a large site. A major storm in 2019 forced the industry to rethink how it approaches hail risk. The catastrophic hailstorm near Midland, Texas damaged more than 400,000 modules at the Midway Solar project, resulting in a reported $70 million insurance claim.
That event changed how the industry approaches hail. Prior to it, most solar projects relied on insurance as the primary protection strategy and assumed that panels certified to resist 25mm hailstones were adequately prepared. Neither assumption held up.
What followed was a push to understand hail risk and build real defenses against it.
How Modern Solar Projects Defend Against Hail
The most important development to come out of that event is something called hail stow. On solar farms that use single-axis tracking systems (where the panels rotate throughout the day to follow the sun), operators can tilt the panels to a steep angle when a storm is incoming. At roughly 52 to 60 degrees, a panel presents a much smaller surface area to falling hail, and the ice is more likely to glance off than shatter the glass.
Research and real-world events have confirmed that this works. During a severe storm system in Fort Bend County, Texas in March 2024, three solar projects successfully deployed hail stow and reported minimal to no damage, even as a nearby project without the protocol in place suffered significant losses. One of those storms produced hailstones over 100mm across, and it hit in the middle of the night, which is one reason automated systems have become so important.
The best-managed sites don’t rely on someone watching the weather and making a phone call. Weather alert services feed directly into the site’s control systems, triggering an automated stow response when a storm with severe hail potential is detected within a set radius. If the automated system doesn’t respond within a minute, operators are trained to initiate a manual backup.
Hail stow isn’t available on every system. Fixed-tilt installations (panels mounted at a permanent angle) don’t have this capability. That’s worth knowing if you’re evaluating a lease or comparing project types.
Panel Durability Has Also Improved
Beyond storm response technology, the panels themselves have gotten more resilient. The standard hail certification test for solar panels has historically been fairly minimal, testing resistance to 25mm hailstones, which are about the size of a quarter. That benchmark, it turns out, doesn’t reflect what hailstorms in the central and southern United States can actually produce.
In response, testing organizations have developed more rigorous approaches. VDE Americas and RETC (Renewable Energy Test Center) recently introduced the Hail Resiliency Curve Test, which fires a range of hailstone sizes at panels until the glass actually breaks, generating data on exactly where a panel’s breaking point is. This gives developers, insurers and landowners a much clearer picture of how a specific panel will hold up in a real storm.
Glass thickness matters too. Panels made with 3.2mm fully tempered front glass are roughly twice as resistant to hail damage as the thinner 2mm glass common in many current installations. Developers building in high-risk regions are increasingly specifying the thicker glass as a result.
Wind: A Manageable Risk with an Unexpected Upside
High winds are a real concern for solar infrastructure, but most utility-scale projects are engineered to withstand the wind loads typical for their region. Trackers and racking systems are designed and tested with local wind data in mind, and the same stow systems used for hail can also be deployed during extreme wind events.
There’s also an unexpected benefit for landowners with crops near a solar installation. Research from Cornell University has shown that rows of solar panels in tracking systems can function as effective windbreaks for adjacent crops, reducing wind speeds in the sheltered zone by up to 70% in severe conditions. A new panel design that lowers the leading row achieved up to 86% wind reduction. This research is still developing, but it suggests solar installations may eventually provide some crop protection benefits that traditional single-row tree windbreaks can’t match.
What About Stormwater from Heavy Rains?
Severe storms also bring heavy rain, and how a solar site manages runoff matters for the land around and downstream from it. That topic deserves its own treatment, and REFA has covered it in detail in Solar Farms and Water Management: What to Know About Runoff, Drainage and Erosion. The short version: a well-designed site with adequate row spacing and healthy ground cover should not cause runoff or erosion problems, but both construction practices and lease language matter.
What to Ask Before You Sign
Storm preparedness on a solar farm isn’t just an operations question. It’s also a lease question. Here’s what’s worth pushing for:
- Does the project use single-axis tracking? Tracking systems are what make hail stow possible. If a developer is proposing a fixed-tilt installation in a hail-prone region, ask how they plan to protect the panels and what their insurance coverage looks like.
- Is hail monitoring and automated stow part of the operations plan? Ask to see the protocol. It should specify how weather alerts are received, how stow is triggered, how quickly the system is expected to respond, and what the backup procedure is if automation fails.
- What type of panel glass is being used? In high-risk areas, thicker tempered glass is a meaningful upgrade.
- Who is responsible for storm damage repairs, and what does that process look like? Make sure the lease clearly assigns responsibility for damage assessment, repair timelines and restoration of the site to operational condition after a major event.
- What insurance is the developer carrying, and what are the coverage limits? Hail insurance for solar has become more complicated and more expensive since the Midway incident. Understanding the coverage structure on a project helps you assess the developer’s ability to recover from a catastrophic event and continue honoring the lease.
- What happens if the project suffers major damage? A lease should address scenarios where a large portion of the array is damaged or destroyed, including timelines for repair, provisions for continued lease payments during restoration and what happens if the project becomes economically unviable.
Severe weather is a real risk for solar infrastructure, and anyone who tells you otherwise isn’t giving you the full picture. But the industry has moved significantly in the past several years toward understanding that risk and building genuine defenses against it. Automated stow systems, improved panel materials and more sophisticated weather monitoring have all made well-managed solar farms meaningfully more resilient than they were even a decade ago.
Data from the National Renewable Energy Laboratory examining thousands of solar projects found that extreme weather events result in a median outage of just two to four days, with less than 0.2% of projects experiencing outages of two weeks or more. Solar isn’t uniquely fragile, but good preparation still matters, and the difference between a well-prepared project and a poorly prepared one can be tens of millions of dollars in damage.
As a landowner, you don’t need to become a solar engineer. But you do need to ask good questions, read the lease carefully, and hold developers to the standards that separate a resilient project from a vulnerable one. The questions above are a good place to start.
