FLEXmax family of charge controllers is the latest innovation in Maximum Power Point Tracking (MPPT) charge controllers from OutBack Power. The innovative FLEXmax MPPT software algorithm is both continuous and active, increasing your photovoltaic array power yield up to 30% compared to non-MPPT controllers. Thanks to active cooling and intelligent thermal management cooling, both FLEXmax charge controllers can operate at their full maximum current rating, 60 Amps or 80 Amps respectively, in ambient temperatures as high as 104°F (40°C). Included in all of the FLEXmax Charge Controllers are the revolutionary features first developed by OutBack Power, including support for a wide range of nominal battery voltages and the ability to step-down a higher voltage solar array to recharge a lower voltage battery bank. A built-in, backlit 80 character display shows the current status and logged system performance data for the last 128 days at the touch of a button. The integrated OutBack network communications allows FLEXmax series Charge Controllers to be remotely programmed and monitored via a MATE system display and provides unrivaled complete system integration. FLEXmax MPPT Charge Controllers are the only choice when you demand a high performance, efficient and versatile charge controller for your advanced power system. Capable of up to 140VDC solar open circuit voltage Max input and user adjustable for out put up to 60-amps at charging nominal batteries configured for 12, 24, 36, 48, 60 VDC battery banks efficiently. Specifications: Nominal Battery Voltages: 12, 24, 36, 48, or 60 VDC (Single model - selectable via field programming at start-up) Maximum Output Current: 60 amps @ 104� F (40�C) with adjustable current limit PV Open Circuit Voltage (VOC): 150 VDC absolute maximum coldest conditions / 145 VDC Standby Power Consumption: Less than 1 Watt typical Power Conversion Efficiency: 98.1% @ 60 Amps in at 48 VDC System voltage - Five Stage charging algorithm.