Tracer series MPPT Controller is suitable for various off-grid solar applications.It protects the battery from being over-charged by the solar modules and over-discharged by the loads.New added function: Automatic limit for maximum PV input powe. Should the PV input exceed the rating, the controller will simply limit the throughput to the rated level. Specification:Multiple load control modes: manual control, lighting ON / OFF, light On+TimerAdvanced Maximum Power Point Tracking (MPPT) technology, with efficiency no less than 99.5%Wide MPPT operating voltage rangeLCD display design, dynamically displaying tool's operating data and working conditionAvailable for PC monitoring and external display realizing real-time data checking and parameters settingCharging Power and Current Limitation FunctionUser is programmable for battery types, load control, etc.Accurately recognizing and tracking of multiple powerpointPV short circuit / PV reverse polarity /Battery over voltageBattery over-discharge / Battery reverse polarity / Load overload protectionAdded Features（than Tracer A）:Blacklight LCD Display / Common Negative Ground / Support lithium Battery / More Safety ProtectionPackage List:1 x Tracer 1210AN Solar Charge Controller 1 x Use Manual