Features： 1、High Speed Microprocessor: Using high speed CPU microprocessor and high accuracy A/D analog to digital converter, it is a microcomputer data acquisition and monitoring control system. 2、Multiple Protections: Solar charge discharge controller is equipped with overcurrent,short circuit, reverse polarity protection, low voltage, overcharge protection, safe to use. 3、Protective Coating: The solar charge controller is protected with a moisture barrier coating that minimizes damage from humidity and nesting insects. 4、Data Transmission Function: It has the function of serial communication data transmission, which can centrally manage and remotely control multiple photovoltaic system sub stations. 5、Wide Application:Solar controller is suitable for agricultural solar power generation systems, solar street lights, ships and other systems. Specification： Item Type: Solar Charge Discharge Controller Material: ABS Temperature Compensation: -3mv/℃/Battery No Load Loss: <45mA Loop Pressure Drop: <200mv Package List： 1 x 20A  Solar Charge Discharge Controller  1 x User Manual 1 x Safety Plate