OutBack created the de facto industry standard when the company introduced its MX60 design, the first multi-voltage MPPT (Maximum Power Point Tracking) charge controllers. Now OutBack follows up on its original breakthrough with another first: a sealed, outdoor-rated charge controller with unprecedented thermal management capabilities designed for the most extreme environmental conditions.
The FLEXmax Extreme’s advanced thermal engineering provides full power output from -20 to 45°C without requiring a cooling fan. Because the passively cooled unit can be sealed, circuit boards and other sensitive electronics can be fully protected from dust, dirt, insects, and other external sources of contamination.
Installer features of the FLEXmax Extreme include: “ground agnostic” design to support negative, positive and floating ground systems, increased wire-bending space, oversized terminals for easier installation with larger gauge wire, and mechanical design that permits servicing and replacing all power components while the unit is mounted on a wall and attached to conduit.
Product No. R1036 Nominal Battery Voltages 12, 24, 36, 48, or 60VDC (Automatic adjustment at start-up) Maximum Output Current 80A @ 113°F (45°C) with adjustable current limit PV Open Circuit Voltage (VOC) 150VDC absolute maximum coldest conditions / 145VDC start-up and operating maximum NEC Recommended Maximum (Solar Array STC Nameplate) 12VDC systems 1000W / 24VDC systems 2000W / 48VDC systems 4000W / 60VDC systems 5000W Standby Power Consumption Less than 1W typical Charging Regulation Five Stages: Bulk, Absorption, Float, Silent and Equalization Power Conversion Efficiency 98% @ 60ADC in a 48VDC system Equalization Charging Programmable voltage setpoint and duration - automatic termination when complete Remote Battery Voltage Sense Yes Voltage Regulation Setpoints 13 to 80VDC Battery Temperature Compensation Automatic with optional RTS installed Temperature Compensation Slope Adjustable 2.0 to 6.0mV per °C per 2V battery cell (5mV default) Voltage Step-Down Capability Can charge a lower voltage battery from a higher voltage PV array - max 150VDC input Programmable Auxiliary Control Output 12VDC output signal which can be programmed for different control applications (maximum of 0.25 ADC) Remote Display and Controller Optional MATE3 or AXS Port 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 time, accumulated amp-hours, and kWh of production Positive Ground Application Requires dual pole breakers for switching both positive and negative conductors on PV input Operating Temperature Range -40°C to 60°C (Full power output -20 to 45°C with passive cooling, 20 to 55°C with Turbo Fan option) Environmental Rating IP54 / NEMA 3R Conduit Knockouts One 1” (25.4mm) on both left and right sides; one on the back; two on the bottom Warranty Standard 5 year / available 10 year Weight (lb/kg) Unit: 22.6 lbs (10.23 kg)
Shipping: 26.0 lbs (11.79KG)
Dimensions HxWxD (in/cm) Unit: 18.56 x 8.8 x 6.0 in / 47.1 x 22.4 x 15.2 cm
Shipping: 9.69 x 11.75 x 22.75 in / 24.6 x 29.8 x 57.8 cm
Non-Volatile Memory Yes Filed Upgradable Firmware Yes Certifications UL1741, CSA C22.2 No. 107.1, EN 50178, AS/NZS 3100, EN 61000-6-1, EN 61000-6-3, EN 55022, IEC 62109-1, FCC Class B, RoHS, CE Optional Accessories AXS Port / FLEXmax Extreme Fan / RTS