I have 6 of these panels on a dew south facing roof. I am totally pleased with their performance in the Texas summer heat. With cloud refraction, I have seen them produce 125% of rated output. They have only been in service now for a short period of time, they seem to average 94% of rated value in full sun with being 12 percent off direct angle with the sun. Since I have only had then for a few months, annual performance is unknown. If they continue at 94% +, I can't complain one bit!

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