Quick Answer
Common signs of hail damage on solar panels include shattered or cracked glass, dents or punctures in the metal frame, and discoloration or pitting on the surface of the panels.
Visual Inspection Techniques
When inspecting solar panels for hail damage, it’s crucial to look for visible signs of impact. Check the panels for any cracks, dents, or shattered glass. For panels with tempered glass, inspect the edges and corners for signs of damage. Use a flashlight to illuminate any areas that may be difficult to see. For a more thorough inspection, use a magnifying glass to examine the surface of the panels for any small damage or pitting.
Measuring Microcracks
Microcracks in solar panels can be challenging to detect visually, but they can significantly reduce the panel’s efficiency. Use a crack detector or a digital microscope to measure the depth and width of any microcracks. A typical microcrack is around 1-2 mm deep and 0.5-1 mm wide. If the crack is deeper than 2 mm or wider than 1 mm, it’s likely to cause significant losses in efficiency.
Assessing Panel Efficiency
To determine the extent of hail damage, measure the panel’s output using a solar panel watt meter. Compare the measured output to the panel’s rated output. A typical solar panel with 300-400 watts of rated output may have a 5-10% reduction in efficiency due to hail damage. Keep in mind that some damage may not be immediately apparent and may only become visible over time.
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