Samlex SEC-2425UL Advanced Fully Automatic Battery Charger Power Supply, 24V, 25A, 3 Stage, Configurable AC Input Voltage, Fan Cooled Based on Output Current, Voltmeter and Ammeter for Monitoring Switch mode technology for high efficiency, lightweight and quiet operation; Automatic operation for ALL Lead Acid Batteries Flooded, AGM or Gel Cell Can charge 2 banks of batteries simultaneously, no isolator necessary; Can be used as a power supply or DC U.P.S when used in conjunction with a battery User Configurable AC Input voltage 120 or 230 VAC, 50 / 60 Hz; User Selectable ( by DIP Switch) for 2 or 3 stage, rapid and safe charging of standalone and loaded Lead Acid Batteries Half Power Mode reduces maximum charging current to half the rated capacity, allows for safe charging of lower capacity batteries Voltmeter and Ammeter for monitoring; Fan cooled based on output current; Includes temperature sensor to prevent under/overcharging of battery if the temperature varies extensively