OutBack Power

Outback Power Flexmax FM80-150VDC Mppt Charge Controller

Free Shipping (Arrives in 3-4 weeks)
In stock and ready to ship


The original maximum power point tracking (MPPT) charge controller, the FLEXmax, increases PV array yield by up to 30% compared to non-MPPT controllers. FLEXmax FM60 and FM80 charge controllers can operate at their maximum rated current in ambient temperatures up to 104 F (40 C) and can be used with battery systems from 12 to 60 VDC with PV open-circuit voltage as high as 150 VDC. The controllers set points are fully adjustable to allow use with a variety of battery types and charging profiles.

FLEXmax FM60 and FM80 controllers come standard with a four-line, 80-character backlit LCD screen that displays PV system performance with a 128-day history and can also be used for programming and monitoring system operation. Both controllers have a programmable AUX relay that can be used for control functions such as battery-enclosure fans, generator starting, or load control. The AUX output is 200 mA at 12 VDC.Use it to power a separate relay with a 12 VDC coil if you need to control more current or to control voltages (AC or DC) other than 12 VDC.

FLEXmax FM100-AFCI MPPT Charge Controller

OutBack Powers new FLEX max FM100-AFCI medium-voltage charge controller accepts higher voltages from PV arrays to allow for longer wire runs with reduced wire sizes. It can be used to charge 24 or 48 VDC battery systems from PV arrays with voltage up to 290 VDC, but can withstand voltages up to 300 VDC without damage. Output is rated at 100 A at 25C (with deration to 80 A at 40C), with four-stage charging and an operating temperature range of -20 C to +60 C. NEMA 3R design allows for outdoor installation.

The FM100-AFCI employs industry-leading technology to meet the most recent 2017 code compliance with regards to GFDI and AFCI detection and interruption, rapid shutdown, and related disconnecting means. Systems that use the FM100 AFCI require no additional GFDI or AFCI equipment. This makes it the most cost effective, easy to install, and low maintenance controller on the market for NEC 2014 and NEC 2017 compliant systems.Built-in AUX relay has a 12 VDC output of up to 250 mA.

As the FM100 has no onboard display, an OutBack Power MATE3s or AXS Port MODBUS/TCP interface is required to program this controller and access the 128-day data-logging history, and the programming and monitoring system functions.

The RTS remote temperature sensor is standard with the FM100-AFCI; and is optional with the FM60 andFM80. FLEXmax charge controls connected to an OutBack inverter system with a HUB can use the system RTS connected to the master inverter.

All FLEXmax charge controllers are covered by a 5-year standard warranty and are listed to UL 1741and C22.2 No. 107.1 for the U.S.A. and Canada. The FM100 is also listed for IEC 62109-1.
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 communications

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, 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.



Models*:FLEXmax 80 (FM80-150VDC)
Nominal Battery Voltages 12, 24, 36, 48, or 60VDC (Single model, selectable via field programming at start-up)
Maximum Output Current 80A @ 104°F (40°C) with adjustable current limit
NEC Recommended Solar
Maximum Array STC Nameplate
12VDC systems: 1000W / 24VDC systems: 2000W
48VDC systems: 4000W / 60VDC systems: 5000W
PV Open Circuit Voltage (VOC) 150VDC absolute maximum coldest conditions / 145VDC start-up and operating maximum
Standby Power Consumption Less than 1W typical
Power Conversion Efficiency 97.5% @ 80ADC in a 48VDC System (typical)
Peak Efficiency 60VDC input w/48V battery at 53.1VDC (98.44%)
Charging Regulation Bulk, absorption, float, silent and equalization
Voltage Regulation Set points 13 to 80VDC user adjustable with password protection
Equalization Charging Programmable voltage setpoint and duration, automatic termination when completed
Battery Temperature Compensation Automatic with optional RTS installed / 5.0mV per °C per 2V battery cell
Voltage Step-Down Capability Down convert from any acceptable array voltage to any battery voltage. Example: 72VDC array to 24VDC battery; 60VDC array to 48VDC battery
Programmable Auxiliary Control Output 12VDC output signal which can be programmed for different control applications (maximum of 0.2ADC)
Status Display 3.1” (8 cm) backlit LCD screen, 4 lines with 80 alphanumeric characters total 3.1” (8 cm) backlit
Remote Display and Controller Optional MATE3, MATE or MATE2
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, maximum battery voltage, min. battery voltage and absorb time, accumulated amp-hours,and kWh of production
Operating Temperature Range -40 to 60°C (power automatically derated above 40°C)
Environmental Rating Indoor Type 1
Conduit Knockouts One 1” (25.4mm) on the back; One 1” (25.4mm) on the left side; Two 1” (25.4mm) on the bottom
Warranty Standard 5-year / Available 10-year
Weight (lb/kg) Unit: 12.20 / 5.53
Shipping: 15.5 / 7
Dimensions H x W x D (in/cm) Unit: 16.25 x 5.75 x 4.5 / 41.3 x 14.6 x 11.4
Shipping: 19 x 9.5 x 8.5 / 48.3 x 24.1 x 21.6
Options Remote Temperature Sensor (RTS), HUB4, HUB10.3, MATE, MATE2, MATE3
Menu Languages English & Spanish
Certifications ETL Listed to UL1741, CSA C22.2 No. 107.1
View AllClose