The 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 (FM60) or 80 Amps (FM80) 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.



  • Input voltage up to 150 Volts

  • 80A output @ 104°F (40°C) with adjustable current limit

  • Compatible with a range of battery voltages: 12 to 60 Volts

  • Local LCD display for monitoring and control

  • Remote monitoring and control via MATE 3S and internet

  • Increases PV array output by up to 30% (relative to PWM)

  • Advanced continuous maximum power point tracking

  • Full power output in ambient temperature up to 104°F (40°C)

  • Battery voltages from 12 to 60VDC

  • Programmable auxiliary control output

  • Built-in 128 days of data logging

  • ETL Listed to UL1741, CSA C22.2 No. 107.1

  • Standard 5-year warranty

  • Made in USA


Weight: 5.5 kg (12 lbs)

Dimensions: 413 x 146 x 114 mm (16.25 x 5.75 x 4.5 in)



Outback Power 80A FLEXmax MPPT Charge Controller, FM80