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Can solar panels withstand hail and survive hurricanes?

Like any outdoor equipment, solar panels are subject to the changing weather. Depending upon where you live, your panels may experience heavy rain, high winds, or even hail. In this article we’ll examine how solar panel systems stand up to intense weather conditions, and what government organizations and industry groups are doing to improve their products and protect consumers from weather-related solar panel damage.

How well do solar panels withstand hail and hurricanes?

As a whole, solar panels are durable and hold up very well in inclement weather. A report from the National Renewable Energy Laboratory (NREL) on 50,000 solar energy systems installed between 2009 and 2013 indicates that only 0.1% of all PV systems have been reported as affected by damaged or underperforming modules each year. We’ll briefly examine two types of weather that have the potential to damage solar systems – hail and hurricanes.

Solar panels and hail

Solar panel manufacturers test their products to ensure that they are capable of withstanding hail storms. In most cases, solar panels are tested and certified to withstand hail of up to 25 mm (one inch) falling at 23 meters per second (approximately 50 miles per hour).

solar panels hail

In fact, not long ago, NREL’s main campus in Golden, Colorado was hit with a severe hailstorm just last month. Of over 3,000 panels on or adjacent to the roof of a net-zero energy building, only one panel was broken during the storm. To get an idea of the intensity of the storm, the same weather system left shattered car windows and dents in vehicles and home roofs around the Denver area. The single broken panel appeared to have been hit simultaneously with several large hailstones in a very concentrated location, leading to micro-cracking of the surface glass. The conclusion: hail may be an impressive physical force, but solar panels are well-equipped to withstand impacts even from large hailstones.

Solar panels and hurricanes

With high wind speeds and heavy rain, solar panels may be at risk of being dislodged from their spot or damaged by high volumes of water. However, similar to hail, solar panels are typically tested by manufacturers to ensure that they can survive hurricanes. Most solar panels are certified to withstand winds of up to 2,400 pascals, equivalent to approximately 140 mile-per-hour (MPH) winds. Additionally, the typical aluminum and glass casings that hold solar cells and constitute a solar panel are highly waterproof, even during extreme rain.

As with hail, real-life extreme weather events have demonstrated solar’s durability in hurricanes. During Hurricane Sandy, New Jersey was hit especially hard. New Jersey also has one of the highest solar power capacities in the United States. In the second quarter of 2012, just before the hurricane hit, the state had installed 103 megawatts (MW) of PV capacity. Analysis after Sandy hit revealed little to no damage to PV systems from the storm. According to a spokesperson for a solar system installer servicing over 200 customers in the regions of New Jersey hit hardest by the storm, a few metal casings covering wires from the panels were damaged by flooding, and one very large system had just two panels come loose.

More recently, Hurricane Maria’s path through Puerto Rico has given insight into the durability of solar energy systems. A 645 kilowatt (kW) rooftop solar array on San Juan’s VA Hospital installed in 2015 continued to operate 100 percent post-storm, even though it was exposed to 180 MPH hurricane winds. What kept this system intact while other local arrays weren’t so lucky? As was the case with Hurricane Sandy, the racking and anchoring systems used to keep the solar panels in place were the ultimate factor in determining wind resiliency. By utilizing flexible racking devices, the VA Hospital system was able to work like a chain link fence to bend under stress rather than staying rigid and eventually breaking. Solar panels can be installed to survive the extreme winds seen in hurricanes, and can be a source of reliable power when other parts of the electrical grid are wiped out.

How solar stakeholders are ensuring that your panels can withstand extreme weather

In addition to the hail and wind certifications that solar manufacturers offer for their products, there are several organizations and initiatives within the solar industry currently working on making solar panels more durable, long-lasting, and cost-effective. Here is a brief overview of some projects in the works.

The Office of Energy Efficiency and Renewable Energy’s SunShot Initiative, which aims to bring down the general cost of solar energy for all Americans, also supports initiatives to improve durability in solar panels. The SunShot Initiative funds NREL researchers to participate in the International PV Quality Assurance Task Force, or PVQAT, which focuses on designing solar energy technology standards.

PVQAT has 12 individual task groups working on implementing their approach to PV component and system quality and bankability. Their three-pronged approach looks to establish a rating system for PV modules based on climate and application of interest, a guideline for factory inspections and quality assurance during manufacturing, and a comprehensive certification of PV systems. Combined, these efforts ensure that modern solar panels will be manufactured with the highest durability standards available.

Additionally, the Durable Module Materials Consortium (DuraMAT), a group of national research laboratories and universities, is focused on improving the physical materials and designs of PV modules. DuraMAT is part of the Energy Materials Network (EMN), a Department of Energy program working on decreasing the time to market for materials critical to clean-energy technologies.

Install home solar panels to ensure a reliable energy source for years to come

Solar panels are one of the most durable and reliable energy technologies in the world, and industry efforts mean that they are becoming more resistant to severe weather damage every day. Installing a home solar energy system ensures that your home can produce its own power, even during severe weather events. When you register for the EnergySage Solar Marketplace, you can find the solar installer that’s right for your home or business, and compare offers side-by-side to find the best deal for a long-lasting, sustainable, and reliable energy system.

This entry was posted in Buyer's Guide on by .

About Jacob Marsh

Jacob is a researcher and content writer at EnergySage, where he's an expert on current issues–and new technology!–in the solar industry. With a background in environmental and geological science, Jacob brings an analytical perspective and passion for conservation to help solar shoppers make the right energy choices for their wallet and the environment. Outside of EnergySage, you can find him playing Ultimate Frisbee or learning a new, obscure board game.

12 thoughts on “Can solar panels withstand hail and survive hurricanes?

  1. Alan Springett

    Interesting – this post was published in June, 2017 yet neither hurricane Irma nor Maria had been generated yet. Irma impacted the US Virgin Islands on September 6th and Maria followed on September 20, 2017, yet the author claims great things and little damage. One, San Juan did not see 180 mph winds. Maria provided the strongest winds to Puerto Rico with Humacao seeing 140 mph maximum winds. The solar array in that area on the wrong side of a large hill suffered major damage. if one wants to see what can happen, read the FEMA P2021 – Mitigation Assessment Team Report – Hurricanes Irma and Maria – USVI, Chapter 7 – Performance of Rooftop-Mounted Solar Panel Arrays. ,

  2. patrick kalungi

    this was quite informative may be kit I can order from you but are looking at installing in Uganda what advice could you offer me would love to know what kit I need
    to supply two domiciles rather homes from the same supply
    thank you

  3. R.Balasubramaniam

    I have 10kw solar power system consisting of 32 panels (each panel of 0.33kw) installed on roof top of my residential building supported on structural pillars at average height of 10 ft. While the total system is well supported, being located in coastal area (Visakhapatnam- east coast of India ) prone to tropical cyclones . Request if you could guide me with a protective method like strapping or binding or any other means of the solar panels to take care of adverse weather conditions.

  4. Robert L. Gumm

    I perceive three (3) potential sources of problems one might experience after having roof-mounted solar panels installed:

    1. Broken panels from over-sized hailstones such are experienced in the south and west

    2. Roof leaks caused by the effects of frequent freezing and thawing of water that seeps in at rooftop mounting points.

    3. Buildup of leaves, pine cones, and pine needles beneath the panels from large leafed shade trees and conifers upwind of the prevailing winds of the installation.

    4. Exorbitant costs involved with the replacement of damaged panels situated within a large plane of panels.

  5. Sue Kamaidech

    The text above notes “little to no damage” to PV during Sandy. Not true.The largest single failure of PV experienced as of that date occurred on a NJ rooftop during that storm. It destroyed thousands of modules. See articles with photos below. Aerial photos from the customary Philadelphia airport landing path showed another similar failure on the same system the next summer, during a comparatively minor storm.

  6. Jay

    We know what 170 mph winds do to standard poles and wire electricicity distribution systems. Puerto Rico is in crisis having relied on the former. Now they should be used as a test case for massive solar investment. Besides, their electric utility is in bankruptcy. Is this solution as obvious as it appears? Or do we want to bring in fleets of helicopters to replace the old network That snaked into tropical rainforest? See story on Bacardi building in San Juan.

    1. Carlos

      This article should be updated to reflect the massive damage done to solar panels in Puerto Rico from Hurricane Maria which I believe made landfall as a category 4. For example, the 25.5 MW Humacao Solar Project, which had 87,696 panels, received massive damage based on photos and video available on the internet. While I think Puerto Rico should absolutely modernize its electrical grid and rely predominately on renewable energy, there needs to be some thought on how to properly protect these important resources given the climate, so our fellow citizens have some chance to recover from these catastrophic events. As an aside, many of the blades in the Punta de Lima wind farm also appear to have been destroyed.

  7. Daniel

    I understand that Hurricane Sandy did a whole lot of damage… largely because coastal cities aren’t built for them… but as a Floridian who has gone through 7 major hurricanes, Sandy is not a good baseline for *real* maximum sustained winds. I mean seriously, it only made landfall as a Cat 1. Not anywhere close to the Cat 3-5’s we see in the South. If a Cat 1 can knock down ANY solar panels, I don’t think that bodes well for stronger hurricanes…

    1. LM

      As a fellow Floridian, I agree. I need to know what happens at 170-180 mph winds. Anything else just isn’t useful information.


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