The brushless motor water supply rod is made of aluminum alloy with adjustable length from 3.5m to 7.5m. Single rotating brush heads provide high-speed cleaning for solar panels, effectively removing dust and dirt. This tool is for large-scale commercial cleaning in non-electric environments like agricultural, fishery, and mountain photovoltaic power stations. Featuring angle adaptation,pure copper brushless motor, and overall waterproof design for cleaning even in rainy weather. Specification: Product name: Single-head photovoltaic cleaning machine (brushless motor version) ?Telescopic rod Length (m): 1.5 1.8 2.1 Number of sections (sections): 3 4 5 Diameter (mm): 36 39.5 43 Wall thickness: 1mm Material: Aluminum alloy ?Drive motor Name: DC motor Total power: 300W Voltage: DC24V Speed: 350 rpm ?Brush head Brush plate diameter (cm): 32 Service life: 1-2 years (depending on the frequency of use) Material: Nylon wire ?Wire and water pipe Wire (m): 8 Packing list: 1xBrush Head 1xInstruction manual 1xTelescopic rod 1xPower line 1xPower converter 1xWater and electricity pipeAPPLICABLE SCENE: Lightweight and low-noise design suitable for commercial large area cleaning environments without electricity, such as factory roofs, power plants, and solar installations on mountains. ANGLE ADAPTATION:Angle adaptation for electric solar panel brush cleaning allows for a customizable range of brush head angles to match the angle of the photovoltaic panel, ensuring even force and easier control during cleaning. WHOLE MACHINE WATERPROOF DESIGN: Waterproof connector and brushless waterproof motor with IP7 waterproof level ensure reliability in rainy conditions. Must be plugged in for use. BRUSHLESS MOTOR WITH MORE USING TIME: Brushless technology reduces losses, increases speed by 15 , and improves stability. Theoretical product life is 20,000 hours, steadily improving cleaning efficiency. SINGLE HEAD PHOTOVOLTAIC CLEANING MACHINE: 150W electric 1-head brush for vigorous scrubbing of dust, dirt, and bird droppings, with a cleaning speed of up to 350r min. Nylon fiber dual-brushes won't dehair or damage panels.