Innovative MPPT Design Die-cast aluminium design ensuring excellent heat dissipation and Renogy Maximum Power Point Tracking technology with a high tracking efficiency of up to 99% and peak conversion efficiency of 98%. It is the best charging solution even in cloudy environments where the max power point of the solar panels will fluctuate all day. 12V/24V Automatically Detect Automatically detects 12V or 24V DC system voltages (for Non-Lithium battery types), and the LCD screen and multiple LED indicators display the solar charging and battery operation information, customizable parameters, and error codes Full System Protection Meant to safeguard your system, the self-diagnostic capability can assess and protect against reverse polarity, battery overcharging, battery over-discharging, overload, short-circuiting, and reverse current. 4-Stage Safely Charging Features 4-stage charging (Bulk, Absorption, Float, and Equalization) of Lead Acid Batteries and 2-stage charging (Bulk and Absorption) for Lithiuim batteries as well as Lithium Reactivation Diverse Load Control Connect DC appliances directly to the optional Load Terminals and monitor consumption or set up timer controls directly from the controller.Remote Monitoring The RS232 communication port allows the Renogy Rover charge controller to communicate with the DC Home app and Renogy ONE M1 via the Renogy BT-1 Bluetooth module. This will enable you to monitor the status and productivity of your panels on the go.