That viral solar panel cleaning claims article missed one huge variable

I read a piece last month claiming dirty solar panels lose 30% efficiency minimum, but they never mentioned weather patterns. I compared my own south-facing array in Phoenix during July dust storms versus my neighbor's in Seattle after three weeks of rain. His panels dropped maybe 5%, while mine hit 22% just from fine particulates. The article used a single lab study from Nevada and ignored humidity, tilt angle, and cleaning frequency. Anyone else notice these generic efficiency stats rarely match real install conditions?

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williamhenderson22d agoMost Upvoted

Hold on, you actually measured a 22% drop just from dust storm residue? That's wild because every single article I've seen quotes that same Nevada lab study like it's gospel. I mean, I get that rain helps clean panels, but the way they present it as a one-size-fits-all number is honestly frustrating for anyone trying to plan around real weather.