Features 1MPPT 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%. 2Parameters Settable: Single string and double string lithium iron phosphate and ternary lithium batteries are applicable check the model for better fit! 3Remote Control Design: The new wireless remote control design of the controller allows you to modify controller parameters and read system information through handheld devices. 4Automatic Operation: This controller can automatically adjust the load power according to the battery power so as to maximize the working time of the battery. 5Long 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! Specification Item Type: Solar Charge ControllerMaterial: AluminumMaximum Solar Power: 260W 12V 520W 24VMaximum Load Power: 100W (12V) 200W (24V) Package List 1 x Solar Charge Controller1 x Manual Note In order to improve the charging efficiency the controller has no battery reverse polarity protection and it is strictly prohibited to reverse connect the battery when wiring.