Here’s the bottom line. Solar farms rarely have a need to clean the panels as the rain is usually sufficient, even in the driest regions. When they clean, they use gentle techniques and avoid harsh chemicals, because chemical use can void the panels’ manufacturers warranty.
Claim: “Harmful chemicals are used to clean panels, that then leach into the ground below and adjacent waterways.
Fact: Rainfall is generally sufficient to keep panels clean. On the rare occasion that unique conditions require more intense cleaning, operators utilize soft brushes and distilled water, often automated by advanced cleaning systems. Most importantly, chemical agents or cleaning solvents are not used, as panel manufacturers warn that their use may damage panels, affect performance, and may void the product warranty if they are applied to the panels.