One method for removing rust involves abrasive cleaning, using tools such as steel wool or sandpaper. Chemical rust removers are another viable strategy, often formulated to penetrate. To effectively eliminate rust from solar panels, it is essential to follow specific methodologies that ensure the panels are restored to their optimal functionality. Application of protective coatings, 4. To successfully tackle rust, 1. Simple Solar Rust Removal: I have a small solar panel gathering dust, so I decided to clean some. Proper solar panel cleaning can increase energy output by 20% in a single session. Other problems include hot spots caused by underperforming cells and potential-induced degradation (PID, which is the result of stray currents within the panel. But you can learn some professional tricks below: Internal corrosion,or rusting of the panels,happens when moisture seeps inside the system. Use a mild detergent mixed with water to.