Quick Answer
Yes, it is safe to operate solar panels during a hailstorm, but potential damage to the panels may occur. Modern solar panels are designed to withstand hail, but the risk of damage still exists. Assessing the severity of the hailstorm and inspecting the panels afterward is crucial.
Hail Resistance and Standard Testing
Solar panels are tested for hail resistance using the International Electrotechnical Commission (IEC) 61730 standard, which requires panels to withstand impacts from 25mm diameter steel balls at speeds of 23.5 meters per second (m/s). This translates to a hailstone of approximately 1 inch in diameter traveling at 53 miles per hour (mph). While this standard provides a level of assurance, real-world hailstorms can be more severe, and actual damage may still occur.
Assessing Hailstorm Severity and Panel Damage
To mitigate potential damage, it’s essential to assess the severity of the hailstorm. If the hail is large, frequent, or prolonged, the risk of damage increases. After the storm, inspect the solar panels for any signs of damage, such as cracks, dents, or broken glass. If damage is found, have a qualified technician inspect and repair or replace the affected panels as needed. In extreme cases, a complete solar panel replacement might be necessary.
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