This product is a solar charge controller. It regulates and controls the charging and discharging conditions of the battery, and controls the power output of the solar cell components and the battery to the load according to the power demand of the load. Prevent the battery from overcharging, over-discharging, and reverse-charging the solar panel at night. Features -Color:Multi -Material: Plastic -Size: 19.00X9.50X4.00cm/7.47X3.73X1.57in -System voltage: 12V/24V adaptive. -Rated charging : 30A | 50A | 100A -Rated discharge : 10A | 20A | 30A -Maximum photovoltaic voltage: up to 23V for 12V , up to 46V for 24V . -Charging cut-off voltage value: B1: - battery (14.2V) B2: Ternary lithium battery (12.2V) B3: lithium iron phosphate battery (14.6V) -Float charge voltage: 14.2 V (default, adjustable) -Discharge cut-off voltage: 10.7 V (default value, adjustable) -Discharge recovery voltage: 12.6 V (default, adjustable) -Standby : <10mA -Working temperature: -35-60 -Four USB outputs: 5V / 2A MAX -Smart chip, high sampling accuracy, high charging efficiency, detection during charging. -The controller has complete functions to control the charging and supply power to the load. -Prevent the battery from overcharging, over-discharging, and reverse-charging the solar panel at night. -The LCD display can display , temperature, and power, and can adjust various parameters by itself. -Applicable to three types of , - (12V/24V automatic selection), lithium , and lithium iron phosphate . Package list: 1 x Solar Charge Controller