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OutBack VFX Series Sine Wave Inverter
Cat. No. 551INVTVFX

The new OutBack VFX series is a ventilated version of our original sealed FX series modular "building block” sine wave inverter/charger that can be used for both small and large power systems. By allowing cooler outside airflow through the internal electronics, more AC power is available and operation in extremely hot environments is improved compared to the sealed FX series.

Each OutBack FX or VFX inverter/charger is a complete power conversion system - DC to AC inverter, battery charger and AC transfer switch. Additional FX inverter/chargers can be connected at any time in either parallel (120 VAC), series (120/240 VAC), or three-phase (120Y208 VAC) configurations. This allows a system to be tailored to meet the specific power conversion requirements of the application, both at the time of the installation and in the future.

The OutBack VFX series is also available in export versions with 230 VAC, 50 hz output that can be connected in parallel (230 VAC) or in three phase (230Y400 VAC) configurations. Like the FX series, the OutBack VFX is also designed to survive harsh environments around the world. The full sreened vent openings are "bug-proof" and the die-cast aluminum chassis protects and keeps the power conversion components cool in very hot environments even when operated at high power for extended periods. The VFX can be used in high ambient applications up to 60oC (with reduced output ratings).
The OutBack VFX series inverter/charger system is designed for both residential and commercial stand-alone or back-up power applications with battery energy storage. It is designed to operate as a coordinated system with the other OutBack products i.e. the PSDC, PSAC and PSR enclosures as well as the MX60 MPPT charge controllers and MATE system controller and display.

Vented Construction Features:
Powdercoated all aluminum die-cast chassis

Internal electronic components are cooled by outside air

Stainless steel screen to protect air intake and internal fan
UL 94V0 plastic vent grills to protect the air exhaust. All openings are 0.0025 inches square to keep out dirt, bugs, and other critters – we call it “bug proof” construction

Air inlet comes with removable, washable foam filter insert to trap small particles

Conformal coated circuit boards to resist corrosion

Higher output power when inverting or battery charging when compared with the sealed FX inverter versions

Designed to allow easy field servicing and repair

Ideal Applications:
Montana or Arizona etc. where salt air is not a problem and climate is dry

More watts per dollar

Installations where well protected environments are available

VFX 2812
VFX 3524
VFX 3648
VFX 3024E
VFX 3048E
Continuous Power Rating at 25 degrees C
2800 VA
3500 VA
3000VA 3000VA
Nominal DC Input Voltage
12 VDC
24 VDC
48 VDC 12 VDC 24 VDC
48 VDC
Nominal AC Input Voltage / Frequency
120V 60 Hz
120V 60 Hz 120V 60 Hz 230V / 50Hz 230V / 50Hz 230V / 50Hz
Continuous AC RMS Output current at 25 C
23.3 amps
29.2 amps
30 amps 11.3 amps
13 amps
13 amps
Idle Power (typical at no AC load) (sleep – 3 watts)
19-21 Watts
18-20 Watts
21-23 Watts 18-20 Watts
18-20 Watts 21-23 Watts
Efficiency (typical at 25 degree C and 75% resistive load)
Total Harmonic distortion voltage (typical / max)
2% / 5%
2% / 5%
2% / 5%
2% / 5%
2% / 5% 2% / 5%
Output Voltage Regulation
+/- 2% typ.
+/- 2% typ
+/- 2% typ
+/- 2% typ
+/- 2% typ +/- 2% typ
Surge Power Capability Peak (1mSec)
56 amps AC
70 amps AC
70 amps AC 35 amps AC
35 amps AC 35 amps AC
Surge Power Capability RMS (100mSec)
40 amps AC
50 amps AC
50 amps AC 20 amps AC
25 amps AC 25 amps AC
Overload Capability (from 25 C start) 5 second
4000 VA
5000 VA
5000 VA
4000 VA
4800 VA 4800 VA
Overload Capability (from 25 C start) 30 minutes
3200 VA
4000 VA
4000 VA
3100 VA
3300 VA
3300 VA
Automatic AC transfer Relay (at nominal AC)
60 amps AC
60 amps AC 60 amps AC 30 amps AC
30 amps AC 30 amps AC
AC Input Current (adjustable limits)
60 amps AC
60 amps max
60 amps max
30 amps max
30 amps max 30 amps max
AC Input Voltage Range (adjustable limits)
90-140 VAC
200-260 VAC
200-260 VAC
200-260 VAC
200-260 VAC 200-260 VAC
Frequency Range – AC Input
54-67.4 Hz
40 to 60 Hz
40 to 60 Hz
40 to 60 Hz
40 to 60 Hz 40 to 60 Hz
DC Input Range (adjustable low battery cut-out)
10-16.5 VDC
20-33 VDC
40-66 VDC 
10–16.5 VDC
20 - 33 VDC
40 - 66 VDC
Recommended DC Breaker
OBDC-175 OBDC-175 OBDC-250
Continuous Battery Charger Output amps DC
125 amps DC
85 amps DC
45 amps DC 125 amps
85 amps 45 amps
Shipping Weight
60 Lbs
60 Lbs
60 Lbs 60 Lbs 60 Lbs 60 Lbs


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