Auto-rotating brush head (300 rpm): The electric solar panel cleaning brush features a 300 rpm auto-rotating brush head that effectively removes stubborn stains from solar panels, shop signs, and billboards. Its 60cm/24" cleaning width boosts work efficiency by up to 80%, reducing manpower needs. 360° rotating brush head: The solar panel washing roller brush has a 360° rotating brush head with adjustable angle and height, ensuring a tight fit on solar panels. The brush head adjusts dynamically to eliminate cleaning dead corners, delivering top-tier cleaning results. 1.66-7.5 m telescopic pole: The handheld cleaning roller brush includes a telescopic pole with adjustable length from 1.66 m (63 inches) to 7.5 m (25 feet). The snap-on design maintains stable length during use, preventing accidental shrinkage and allowing you to reach panels at varying heights. Lightweight aluminum pole and nylon bristles: Made of premium aluminum, this photovoltaic panel cleaning brush is sturdy yet lightweight for long-term use. High-density nylon bristles scrub dirt effectively without scratching solar panels or windows. Dry/wet modes and multi-scene application: The outdoor cleaning kit features a water outlet for adding water, enabling simple switching between dry and wet cleaning. Lightweight and versatile, it is suitable for factory roofs, mountain, fishpond, and high-pile solar power plants.