Features 1Stable Charging: Lithium battery specific activation function and voltage stabilizing charging function to avoid solar charge controller crash and protect battery cells. 2Applicable Battery: When the battery does not power to the controller it will take power from PV suitable for acid gel battery ternary lithium battery lithium iron phosphate battery etc. 3Circuit Protection: With solar anti reverse charging battery reverse connection battery open circuit overvoltage and load overload power failure and thunder protection. 4High Efficiency: The MPPT controller can quickly track the maximum power point of the PV array improve the solar utilization and provide greater charging current. 5Working Modes: Support pure light control mode normally open mode light control and time control mode a variety of load modes are optional to meet different needs. Specification Item Type: Solar Charge ControllerModel: LSECM20A 12/24VRated Current: 20APV Maximum Connection Power: 12V: 20A-260W24V: 20A-520WController Power Taking Method: Battery or photovoltaic panelCharging Method: MPPT Charging FunctionLoad: Multiple Working Modes are Available: Pure light control mode normally open mode light control and time control mode (4 periods and morning light)Protection Type: Solar battery anti reverse charging protection battery open circuit protection battery reverse connection protection overload protection etc.Size: Approx. 145.5 x 131.9 x 61.8mm / 5.7 x 5.2 x 2.4in Package List 1 x Controller1 x User Manual