1、MPPT Technology: Advanced maximum power point tracking (MPPT) technology is adopted by this controller, with tracking efficiency no less than 99% and charge conversion efficiency up to 96%. 2、Parameters Settable: Single string and double string lithium iron phosphate and ternary lithium batteries are applicable, check the model for better fit! 3、Remote Control Design: The new wireless remote control design of the controller allows you to modify controller parameters and read system information through handheld devices. 4、Automatic Operation: This controller can automatically adjust the load power according to the battery power, so as to maximize the working time of the battery. 5、Long Life Span: The shell of this controller is made of premium aluminum material, which is strong and sturdy, suitable for various outdoor weather conditions, you can take it with confidence! 1 x Solar Charge Controller1 x Manual  Item Type: Solar Charge ControllerMaterial: AluminumBattery Voltage: 12V, 24VMaximum Solar Power: 260W 12V, 520W 24VMaximum Load Power: 100W (12V), 200W (24V)Maximum Operating Voltage of Solar Cell Module: 17V-72V (12V), 34V-72V (24V)Maximum Solar Working Voltage: 100VLED Voltage: 15V-60V (12V), 30V-60V (24V)