Can Solar Panels Survive Hurricanes and Withstand Hail?


| 7/6/2017 12:01:00 AM


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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).

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 winds.



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