During the summers here in Florida we have thunderstorms every afternoon. Daytime temps can be above 100°F in the shade, so I could imagine surface temps getting to 130-160°F on the panels, but then they are impacted by droplets of water, sometimes as much as 2 inches (4 cm) per hour, though for a very brief duration. The rain’s temperature can be less than 70°F so a temperature shift of 90°F and the glass does not break or shatter. There may be a different panel design in your region, but I am curious about the advice you were given by the install company.
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