Features 1Adopt industrial grade master chip large screen LCD display charge and discharge parameters adjustable 2Built in overflow short circuit protection open circuit protection reverse protection all self recovery no damage controller 3Complete 3 stage PWM charging management dual MOS anti pushing circuit ultra low heat generation 4Good quality durable can be used for a long time bring a lot of convenience 5More convenient to use and easy to operate easy to carry easy to take easy to use Specification 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: <10mAWork Temperature: -35 ~ + 60 Package List 1 x BatterySolarController1 x User Manual