360-degree automatic rotating brush head: The adjustable solar panel cleaning brush features a continuously rotating head with customizable angles and heights, reaching every corner for thorough cleaning without missing spots. Versatile and lightweight design: Ideal for cleaning solar panels, exterior windows, RV windows, store signs, and billboards, ensuring a streak-free finish with ease in various applications. Dual cleaning modes: Includes a water outlet for switching between dry and wet cleaning; dry mode for quick decontamination, wet mode for deep cleaning in all corners, combinable for best results. Automatic operation: Electric brush head rotates at 150-300 rpm, effectively removing stubborn stains from surfaces like solar panels and signs, boosting efficiency by up to 80% and reducing manual effort. Wide application range: Lightweight and efficient, suitable for multiple scenarios including solar panels, windows, and large signs, maintaining optimal performance and appearance effortlessly.