Solar ChargeMaster protects your battery from being overcharged by the solar array and from being deeply discharged by loads.Designed to optimize battery life, Solar ChargeMaster features intelligent three-stage charging for 12V or 24V systems and is adjustable for lead acid, gel or AGM battery types. Features include an included battery temperature sensor, LCD character display, automatic nighttime detection, extended alarm indications and low battery load disconnect.Both Solar ChargeMaster controllers includes a serial interface which can be used with an optional interface adapter for PC connection via PC-Link. Solar ChargeMaster works with most PV modules and the three-step charging routine is adjustable for conditions of use and battery type. Includes system alarm.Key Features High efficiency so your batteries are charged quicklyCapacity for solar panel configurations of up to 3600 wattsCompatible with AGM, gel, flooded and Mastervolt Lithium Ion batteriesFast and flexible setting of battery typeBattery temperature sensor included for long lifespanAutomatic 12 V/24 V/48 V voltage detectionMulti-stage smart charging: Absorption voltage: 14.4/28.8 V @ 25 C; Equalization voltage: 14.8 29.6 V (@ 25 C), 2 h; Float voltage: 13.7 / 27.4 V (@ 25 C)Fully protected against overtemperature, overload, high/low battery voltage, high/low PV voltage, short circuit and reverse polarityAutomatic Functions: Three stage charging, load and disconnect User Selectable Functions: Settings for lead acid, Gel or AGM batteries Solar Input Voltage: 12-50V DC System Voltage (Battery): 12V or 24V Draw: No load: <4mA Display: LCD display Connections: Screw terminals User Manual