This solar battery charge controller by AIMS Power features a smart tracking algorithm using MPPT charging technology and has less power loss performing at 97.5-99% efficiency, maximizing energy harvest. The tracking algorithm is automatic and varies with weather conditions. This charge controller also has temperature compensation protection using the included battery temperature sensor. Charges 12, 24, 36 and 48 volt solar systems with multistage charging technology and adjusts according to battery type. The AIMS charge controller includes LED indicators to show charging status and faults. An LCD displays key information such as battery voltage, solar panel voltage, solar panel charging current and charge mode. Users are able to revise and set the default parameters according to system design. MPPT technology: Maximum Power Point Tracking produces maximum available power from PV array to battery bank utilizing peak power of the I-V curve. Features: Quality heatsink cooling no fans needed and no thermal deratingBattery type selector and user defined charging voltagePV input, battery output and load control portsStackableReliable electronics, over engineered components generating less heatLow self consumptionOptimal cooling case design built for extreme conditionsOver temp protectionOverload, short circuit, high and low voltage protectionRS485 port for computer monitoringConformal coated for marine environmentsMounting holesProtections: overload, short circuit, high voltage, high temperature, low voltage and auto correctProtections: overload, short circuit, high voltage, high temperature, low voltage and auto correct Specifications: PV Operating Voltage: 15-150Vdc@12V, 34-150Vdc@24V, 50-150Vdc@36V, 60-150Vdc@48VRated PV input: 12V 1400 Watts, 24V 2800 watts, 36V 4200 watts, 48V 5600 wattsMaximum charging current: 100 ampsMaximum DC load current: 60 ampsMax PV open circuit voltage: 150VdcSelf power consumption: <4 wattsBattery types: gel, sealed, AGM, flooded, lithium, user defined (adjustable voltage)4 Stage charging: bulk, absorption, float and equalizeBulk charge voltage: sealed 14.4V, AGM/gel 14.2V, flooded 14.6V, user defined 10-15VFloat charge voltage: sealed/AGM/gel 13.7V, flooded 13.6V, user defined 10-15VEqualize charge voltage: sealed 14.6V, AGM/gel 14.8V, flooded 14.8V, user defined 10-15VLow voltage reconnection: 12.5VLow voltage disconnect voltage: 10.5V (10.5-12.5V adjustable)Enclosure: IP43 protection, metalHumidity: 100% non-condensingTemperature compensation: -5mV C / 2V with BTSTemperature range: -25 C to 60 C or -13 F to 140 FWire knockouts: 1.25"Dimensions: 17.5"L x 9"W x 4.7"HUnit weight: 20 lbs, Boxed weight: 22 lbsWarranty: 2 yearsCertifications: ETL to UL1741, CE, RoHS.