Feature:1. Adopt industrial grade master chip, large screen LCD display, charge and discharge parameters adjustable2. Built in overflow short circuit protection, open circuit protection, reverse protection, all self recovery, no damage controller3. Complete 3 stage PWM charging management, dual MOS anti pushing circuit, ultra low heat generation4. Good quality, durable, can be used for a long time, bring a lot of convenience5. More convenient to use and easy to operate, easy to carry, easy to take, easy to useSpecification:Item Type: Battery Solar ControllerMaterial: ABSRated Charging Current: 10A , 20A , 30ARated Discharge Current: 10ABattery Type: B1 = Lead Acid Battery 12V ,24V Battery Automatic IdentificationB2 = Lithium Ion Battery (Lithium Battery) 3 String 3.7V = 11.1VB3 = Lithium Iron Phosphate Battery 4 String 3.2V to 12.8VDischarge Upper Up: 10.7V (B1) 9V (B2) 10V (B3)Light Control Open Light Valve Value: Photovoltaic Plate 8V(Optical Control Light is Delayed)Optical Control Switch Valve Value: Photovoltaic Plate 8V (Optical Control Light is Delayed)Usb Output: 2 Way USB Output, 5V , 2.5A (Maximum)Stope Current: andlt 10mAWork Temperature: -35 - and 60 .Package List:1 x Battery Solar Controller1 x User ManualNote: