Feature:1. Suitable for 1-1000AH 12V Lead-Acid Battery charger.2. Suitable for 12V Solar panels Max power point voltage(V MMPT) is 17.5-18.5V.3. Used in car battery charging, solar panel charging, lead acid battery charger, electric bicycle charger, solar UPS, portable industrial and medical equipment, independent battery charger.4. Photovoltaic battery maximum power point tracking (MPPT).5. Overcurrent protection, battery overvoltage protection, charger status indication.Specification:Item Type: MPPT Solar Controller Charging ModulePower supply voltage: 12V Solar panels or 18-28VDC power supplyOver Charge Voltage: 14.8VFloat Charge Voltage: 13.55VMaximum Charge Current: 3A(defaultQuiescent Current: About 1.8mAHigh PWM Switching Frequency: 300KHzFixed Over-Charge VoltageOvercurrent protectionAutomatic Conditioning of Deeply Discharged BatteriesAutomatic RechargeCharger Status IndicationBattery Overvoltage ProtectionOperating Ambient Temperature 40 to 85Optional Type: With Terminal, Without Terminal.Package List:1 x MPPT Solar Controller Charging Module