Outback Power

OutBack FLEXmax MPPT Charge Controller

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FM100 Model Available in April
  • OutBack FLEXmax MPPT 60 Charge Controller
  • OutBack FLEXmax MPPT 80 Charge Controller
  • OutBack FLEXmax MPPT 60 vs MPPT 80 Charge Controller
  • OutBack FLEXmax MPPT 100 Charge Controller AFCI
$469.33 - $1,494.66


OutBack FLEXmax MPPT Charge Controller

OutBack Product Highlights:

  • Maximum Power Point Tracking (MPPT)
  • Active cooling and intelligent thermal management cooling
  • Ambient temperatures as high as 104°F (40°C)
  • Built-in, backlit 80 character display
  • Integrated OutBack network communication

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 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, back lit 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.


  FLEXmax 80 - FM80-150VDC FLEXmax 60 - FM60-150VDC
Nominal Battery Voltages 12, 24, 36, 48, or 60 VDC (Single model - selectable via field programming at start-up)

NEC Recommended Solar

Maximum Array STC Nameplate

12 VDC systems 1000 Watts / 24 VDC Systems 2000 Watts

48 VDC systems 4000 Watts / 60 VDC Systems 5000 Watts

12 VDC systems 750 Watts / 24 VDC Systems 1500 Watts

48 VDC systems 3000 Watts / 60 VDC Systems 3750 Watts

PV Open Circuit Voltage (VOC) 150 VDC absolute maximum coldest conditions / 145 VDC start-up and operating maximum
Standby Power Consumption Less than 1 Watt typical
Power Conversion Efficiency 97.5% @ 80 Amps DC in a 48 VDC System - Typical 98.1% @ 60 Amps DC in a 48 VDC System - Typical
Charging Regulation Five Stages: Bulk, Absorption, Float, Silent and Equalization
Voltage Regulation Set points 13 to 80 VDC user adjustable with password protection
Equalization Charging Programmable voltage setpoint and duration - automatic termination when completed
Battery Temperature Compensation Automatic with optional RTS installed / 5.0 mV per °C per 2V battery cell
Voltage Step-Down Capability
Down convert from any acceptable array voltage to any battery voltage.
Example: 72 VDC array to 24 VDC battery; 60 VDC array to 48 VDC battery
Programmable Auxiliary Control Output
12 VDC output signal which can be programmed for different
control applications (maximum of 0.2 Amps DC)
Status Display 3.1" (8 cm) backlit LCD screen - 4 lines with 80 alphanumeric characters total
Remote Display and Controller Optional MATE3, MATE or MATE2 with RS232 Serial Communications Port
Network Cabling Proprietary network system using RJ-45 Modular Connectors with CAT5 Cable (8 wires)
Data Logging
Last 128 days of operation: Amp Hours, Watt Hours, Time in Float, Peak Watts, Amps, Solar Array Voltage, Max.
Battery Voltage, Min Battery Voltage and Absorb, Accumulated Amp Hours, and kW Hours of production
Operating Temperature Range -40 to 60°C (power automatically derated above 40°C)
Environmental Rating Indoor Type 1
Conduit Knockouts One 1" (35 mm) on the back; One 1" (35 mm) on the left side; Two 1" (35 mm) on the bottom
Warranty Standard 5 year / Available 10 Year

12.20 lbs (5.56 kg)
15.5 lbs (7.3 kg)

11.65 lbs (5.3 kg)
14.90 lbs (6.7 kg)

Dimensions (H x W x D)

16.25 x 5.75 x 4.5" (41.3 x 14.6 x 11.4 cm)
19 x 9.5 x 8.5" (48.3 x 24.1 x 21.6 cm)

13.75 x 5.75 x 4.5" (35 x 14.6 x 11.4 cm)
17 x 9.5 x 8.5" (43.2 x 24.1 x 21.6 cm)

Options Remote Temperature Sensor (RTS), HUB4, HUB10, MATE, MATE2, MATE3
Menu Languages English & Spanish
Certifications ETL Listed to UL1741, CSA C22.2 No. 107.1

NOTE: The remote battery temperature sensor is not included with the FM60 and FM80. It is an optional accessory for more precise battery charging.

Product Diagram:

How to use the Flexmax controller auxiliary output to control Missouri Wind Turbines

Outback FlexMax Controller Diagram

Click to enlarge

*Does not include wind turbine, batteries, and other components shown in this image. Image for illustrative purposes only.

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