Inverters; Battery-Based
Off-Grid Inverter / Charger

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Outback, VFX3648 Inverter Charger

Outback, VFX3648
  • VFX3648 Inverter / Charger
  • Solar. Wind. Hydro. Generator. No matter what your energy source is, OutBack products are engineered to provide your home or business with reliable electricity around-the-clock. The OutBack modular system architecture allows your system to grow along with your power needs up to 36,000 watts. Power hungry appliances like washing machines, air conditioning and power tools are easily started by our inverter's substantial surge power capability. When not in use, the inverter enters a power save mode consuming as little as 3 Watts, saving your battery power for when you need it the most. OutBack's innovative Maximum Power Point Tracking (MPPT) technology gets the most from your solar array and can also control hydro or wind turbine charging sources. Complete system status and control is easily monitored by a single control, instead of requiring the user to keep an eye on multiple displays and status indicators.
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Battery Based Renewable Energy Systems / Inverter / Chargers | Off-Grid

Model Part Number Watts Input Voltage Output Voltage Type Continuous AC RMS Output at 25°C (77°F)
Outback, VFX3648 Inverter 3200018 3,600 48 VDC 120 VAC Pure Sinewave
30 Amps AC

controller shipThe term RMS (Root Mean Square) applies to voltage and current (amps) measurements. The marketing departments of some companies express power in "RMS" rather than the technically correct term "Average Power".

OutBack Power’s true sine wave inverter/charger is a complete power solution. It incorporates a DC to AC sine wave inverter, battery charger and AC transfer relay housed within a die-cast aluminum chassis. Intelligent multi-stage battery charging reduces generator runtime and prolongs the life of your batteries. Built-in networked communications enables multiple units to be stacked and connected with other OutBack Power electronics providing industry-leading integration and near infinite application flexibility. The exclusive modular system architecture means that increased power output is just an additional inverter/charger away. Outback's flagship FX series uses a sealed chassis that can operate in the harshest environmental conditions such as high humidity and corrosive salt air.


  • Sine wave output
  • Intelligent battery charging capabilities
  • Modular, stackable design
  • Bug-proof chassis
  • Corrosion-resistant internal components
  • Backed by a five-year (60-month) limited warranty


Outback energy

What's In The Box

  • Outback, VFX3648 battery inverter, 3600W, 120VAC, 60Hz, 50A Transfer, 48VDC, Sinewave, Off Grid, 5 Yr Warranty, 45A Charger, with BTS (Battery Temperature Sensor)


controller shipOutback Inverter / Chargers ship in 2 - 3 business days after funds clear.

generatorBecause few gas generators produce grid quality AC power, when using OutBack grid-interactive products in conjunction with a generator to recharge batteries, Outback only recommends using Honda EU generators. Flexware relay assembly may be necessary for auto start function of a two wire auto start generator.


Optional Accessories Part # Price  
OutBack Mate Remote Monitor / Controllerbattery charger BP9578062monitor
OutBack Mate 3 Remote Monitor / ControllerGTFX2524 BP9578732outback
Atkinson GSCM-Mini Auto Generator Start Module 12-24V - The Atkinson Auto Generator Start GSCM-Min controller is optimized for use on Outback inverters. It supports three types of 3 wire gas-generator control: momentary, maintained or ignition. It has a fixed crank time and over and under frequency shutdown. 2 year limited warranty.dc electricity 02006343remote temperature sensor
FLEXnet DC System Monitor - OutBack Power's FLEXnet DC is the ultimate DC system monitoring device. Outback's integrated networked communications make valuable, usable data available from your system and viewable on an OutBack MATE communications device, providing you with the critical answers about your system's health, performance and efficiency.
Data Sheetdc electricityUsers Guidedc electricity
5700103remote temperature sensor
HUB4 Outback Communications Hub, 4 Ports - The HUB system communications manager is the backbone of your networked OutBack power conversion system. The OutBack HUB communicates stacking, load share and power save on/off signals. Interconnection cabling is standard Ethernet CAT5 with RJ45 modular jacks. Through the use of a HUB, your system is completely coordinated and managed by the MATE.dc electricity 5700103remote temperature sensor
  Sealed Models Vented Models
VFX3648VFX3648 VFX3648VFX3648 VFX3648VFX3648
Nominal DC Input Voltage 12 VDC 24 VDC 48 VDC 12 VDC 24 VDC 48 VDC
Continuous Power Rating at 25° C 2000 VA 2500 VA 3000 VA 2800 VA 3500 VA 3600 VA
AC Voltage/Frequency 120 VAC 60 Hz 120 VAC 60 Hz 120 VAC 60 Hz 120 VAC 60 Hz 120 VAC 60 Hz 120 VAC 60 Hz
Continuous AC RMS Output at 25° C 17.0 amps AC 20.8 amps AC 25 amps AC 23.3 amps AC 29.2 amps AC 30 amps AC
Full Idle Power ≈ 20 Watts ≈ 23 Watts ≈ 23 Watts ≈ 20 Watts ≈ 20 Watts ≈ 23 Watts
Search ≈ 6 Watts ≈ 6 Watts ≈ 6 Watts ≈ 6 Watts ≈ 6 Watts ≈ 6 Watts
Typical Efficiency 90% 93% 93% 90% 92% 93%
Typical Total Harmonic Distortion 2% 2% 2% 2% 2% 2%
Maximum 5% 5% 5% 5% 5% 5%
Output Voltage Regulation ± 2% ± 2% ± 2% ± 2% ± 2% ± 2%
Peak Maximum Output Current 56 amps AC 70 amps AC 70 amps AC 56 amps AC 70 amps AC 70 amps AC
RMS 40 amps AC 50 amps AC 50 amps AC 40 amps AC 50 amps AC 50 amps AC
Surge AC Overload Capability 4800 VA 6000 VA 6000 VA 4800 VA 6000 VA 6000 VA
5 Second 4000 VA 4800 VA 4800 VA 4000 VA 5000 VA 5000 VA
30 Minutes 2500 VA 3200 VA 3200 VA 3200 VA 4000 VA 4000 VA
AC Input Current Maximum 60 amps AC 60 amps AC 60 amps AC 60 amps AC 60 amps AC 60 amps AC
AC Input Voltage Range (MATE Adjustable) 80 to 150 VAC 80 to 150 VAC 80 to 150 VAC 80 to 150 VAC 80 to 150 VAC 80 to 150 VAC
AC Input Frequency Range 55.0 to 65.0 Hz 55.0 to 65.0 Hz 55.0 to 65.0 Hz
55.0 to 65.0 Hz 55.0 to 65.0 Hz 55.0 to 65.0 Hz
DC Input Range 10.5 to 17.0 VDC 21.0 to 34.0 VDC 42.0 to 68.0 VDC 10.5 to 17.0 VDC 21.0 to 34.0 VDC 42.0 to 68.0 VDC
Temperature Range         Rated 0 to 50°C (power derated above 25°C) 0 to 50°C (power derated above 25°C)
                                     Maximum -25 to 60°C (Functions but does not necessarily meet all component specifications) 25 to 60°C (Functions but does not necessarily meet all component specifications)
Continuous Battery Charge Output 80 amps DC 55 amps DC 35 amps DC 125 amps DC 82 amps DC 45 amps DC
Certifications ETL Listed to UL1741 ETL Listed to UL1741
Warranty Standard 5 year Standard 5 year
Unit Weight 62 lbs (29 kg) 61 lbs (28 kg)
Shipping 67 lbs (30 kg) 67 lbs (30 kg)
Unit Dimensions (H x W x L) 13 x 8.25 x 16.25" (33 x 21 x 41 cm) 12 x 8.25 x 16.25" (30 x 21 x 41 cm)
Shipping 21.75 x 13 x 22" (55 x 33 x 56 cm) 21.75 x 13 x 22" (55 x 33 x 56 cm)
off-grid inverter

Outback, VFX3648 Inverter Charger Off-Grid Renewable Energy System

Outback, VFX3648 Inverter Charger will change the direct current (DC) power from stored energy in batteries, and convert it into alternating current (AC) electricity that home, RV or Marine owners can use to power T.V.s, refrigerators other electronics.

To evaluate your power requirements look at the name plate of the largest electronic appliance you want to run then look at the watt and surge rating of the Outback, VFX3648. Your inverters consistent power capacity and surge capacity should allow a + 25% calculation safety factor when measured against the highest energy demand of your appliance.

rv VFX3648 inverterIMPORTANT SAFETY INSTRUCTIONS: It is the responsibility of the purchaser to ensure that all products are installed and operated in accordance with local and national building codes as specific by the NEC (National Electric Code), UBC (Uniform Building Code) or IBC (International Building Code) and local utility company policy. This product is designed for indoor or protected compartment installations. DO NOT expose the inverter to rain, snow, moisture or liquids of any type. Use insulated tools to reduce the chance of electrical shock or accidental short circuits. Remove all jewelry such as rings, watches, bracelets, etc. when installing the Outback inverter or any other electronic gear. Always disconnect the batteries or energy source prior to installation or performing maintenance on the Outback, VFX3648 inverter. Live power may be present at more than one point since an inverter utilizes both batteries and AC electricity. Turning off the inverter may not reduce that risk. Always verify proper wiring prior to starting the inverter. Do not operate the inverter if it has been damaged. Always read and follow the manufactures installation and operating instructions for the Outback, VFX3648 inverter charger prior to installation and operation.