solar panel dust accumulation

https://cleaningexteriorscreensfinder.novacrestiq.com/posts/why-cleaning-exterior-screens-matters-after-a-phoenix-haboob

Even a thin layer of dust on solar panels can significantly reduce energy output, acting like a dirty windshield that blocks sunlight. This buildup is common in dry, windy areas or near construction sites, and regular cleaning is essential for maintaining optimal efficiency. Rainfall isn't always enough to keep them spotless, especially if the dust is fine or oily.