1Wide Applicability: This polysilicon solar charging panel is suitable for motorcycles, boat, tractor, trailer, truck, lawn mower, Rv etc. Also be used for gate openers, electric fences, chicken coops, sheds, and lights. 2High Efficiency: Made of polysilicon and metal, high temperature and water resistance, and can easily cope with the harsh outdoor environment. It has a high charging efficiency to achieve the most ideal charging effect in a limited space. 3Sturdy Construction: The solar panel frame is made of low iron tempered glass surface and rust resistant aluminum frame, which can prevent wear and tear for a long service life. The polycrystalline silicon panel can generate more electricity every day under sunny conditions. 4Battery Protection: The charge controller can prevent battery overcharge, overdischarge, overvoltage, short circuit and reverse current problems. It prevents the battery from depleting due to long time non use. Indicators on the controller make it easy to know the status of charging and discharging. 5Built in Intelligent Controller: The charging algorithm of the solar battery charger has been upgraded to automatically charge during the day and shut down at night without consuming battery power.