Features： 1、Has short?circuit protection, open?circuit protection, reverse protection, over?load protection. 2、3?stage PWM charge management, improve system efficiency and prolong the life span of the battery. 3、Large?screen LCD display, clear data, adjustable charge and discharge parameters. 4、Two?way MOS tube anti?backflow circuit, high?power charging mode, ultra?low heat. 5、The solar panel controller can charge 12V/24V batteries, ultra?wide charge and discharge adjustable. Specification： Item Type: Solar Charge Controller Material: PVC Color: As shown in the picture Product Size: Approx. 13.3x6.8x3cm / 5.2x2.7x1.2in Weight: Approx. 145g / 5.1oz Rated Voltage: 12V 24V automatic (12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels) Rated Current: 30A Charging Mode: 3 stages Function: Charge 12V/24V battery, ultra-wide charge and discharge adjustable Self-Consumption: <10MA Overcharge Protection: 14.4V/28.8V Floating Voltage: 13.7V/27.4V Over Discharge Protection: 10.7V/21.4V Over Discharge Recovery: 12.6V/25.2V Maximum Input Power: 360w(12v) 720w(24v) Package List： 1 x Solar Charge Controller 1 x Instruction Manual