Features: The solar charging controller is made for 12V batteries. Applicable batteries: 2V leads-acid battery, 12V stranded battery, 12.8V acid. The solar charging controller utilizes a new charging technology with maximums power tracking. INPUT for solar panel interfaces , OUTPUT for battery interfaces for a tighter connection. The USB and type c ports can quickly charging your devices using solar panel or batteries. Equipped with necessary protections devices, the control parameters of systems is adjustable, easy to set up and operate. Builted in overheating, overcurrent, short circuits, open circuits protections, controllers automatic recovery. Specifications: Component: ABS and PC Current: 10amp/20A Size: about 104x51x20mm/4.09x2.01x0.79inch 10amp Controller Type: 20A Controller Type: Battery voltages: 12V maximums open circuit voltages: 30V Increase charging voltages: leads acid and colloidal batteries: 14.4V Lithium iron battery: 14.6v Floating voltages: leads acid and colloidal batteries: 13.6-13.8V discharge current: ＜30mA USB output: QC18W (maximums) 5V3A9V2A12V1A5A TYPE C output: PD20W (maximums) 5V3A9V2A12V1A67A Package Includes: 1pc Solar charging Controller note: 1. Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. 2. First connecting the battery, then connecting the solar panel. When using, pay attention to polarity. If using both the controller and to bare wire, prepare your own polarity converter.