Outback Power VFXR2812A 2.8 kW FXR Series Grid/Hybrid Inverter/Charger

The OutBack Power VFXR2812A is a 2,800VA hybrid solar inverter charger in the proven FXR A-Series line, designed for 12VDC battery systems requiring reliable sine wave output, grid-interactive operation, and the environmental durability to perform in demanding conditions. Its vented NEMA Type 1 die-cast aluminum chassis supports continuous operation at full rated power while handling the heat, humidity, and salt air exposure that sealed enclosures cannot.

Key specifications

• Continuous output power: 2,800VA at 77°F (25°C)
• Surge capacity: 4,800VA instantaneous (100ms); 4,500VA (5-second); 3,200VA (30-minute)
• AC output voltage / frequency: 120VAC selectable (100–130VAC); 60Hz selectable (50Hz); output voltage regulation ±2.5%
• Nominal DC input voltage: 12VDC (10.5–17VDC operating range)
• Battery charger output: 125ADC continuous; 18AAC / 125ADC maximum; 1,700VA charging power; flooded, gel, AGM, lithium-ion, and flow chemistry supported
• AC input: 85–140VAC; 54–66Hz; 60AAC maximum input current; grid-interactive range 106–132VAC / 59.3–60.5Hz
• Typical efficiency: 90%; CEC weighted efficiency: 90.5%
• Total harmonic distortion: typical <2%; maximum <5%
• Idle power: ~34W (full); ~9W (search mode); ~3W (off)
• Operating temperature: rated −4°F to 122°F (−20°C to 50°C); operating −40°F to 140°F (−40°C to 60°C)
• Enclosure: Vented NEMA Type 1 die-cast aluminum; 93% relative humidity rated
• Certifications: UL1741, CSA C22.2 No. 107.1, UL1778, Annex FF; RoHS compliant
• Dimensions: 13 H × 8.25 W × 16.25 L in. (33 × 21 × 41 cm); 62 lbs. (28 kg)
• Warranty: Standard 5-year; extended 10-year available

Seven operating modes, including GridZero

The VFXR2812A supports seven programmable operating modes covering grid-tied self-consumption, backup, generator assist, and off-grid operation. The OutBack GridZero mode is particularly useful for installations in markets where net metering incentives have diminished or utility sell-back is restricted—it prioritizes stored solar energy to meet loads without exporting to the grid, reducing grid dependence without triggering sell-back limitations. Generator assist mode allows a smaller generator to supplement inverter output for loads that exceed generator capacity alone, reducing generator wear and fuel consumption.

Built for harsh environments

The vented VFXR chassis is engineered for installations where sealed enclosures would thermally derate or fail prematurely. Rated for operation from −40°F to 140°F (−40°C to 60°C) and 93% relative humidity, it is suited to marine, coastal, and industrial environments with persistent salt air, condensation, or elevated ambient temperatures. The NEMA Type 1 die-cast aluminum construction provides the structural integrity and thermal management that mission-critical installations demand.

Application scenarios

• Off-grid residential or cabin: Standalone battery-backed system with generator assist for extended autonomy on a 12V bank.
• Grid-tied backup: Seamless automatic transfer switch (built-in ATS per UL1741) keeps loads powered during outages without external transfer hardware.
• Marine and coastal installations: Vented enclosure and wide humidity/temperature ratings handle the salt air and thermal stress of marine environments.
• Scalable commercial systems: Up to nine VFXR units can be stacked for three-phase operation, or ten in parallel for single-phase or split-phase configurations—scaling from a single 2.8kW unit to larger multi-inverter arrays as load requirements grow.

Modular, stackable architecture

The FXR A-Series uses a modular design that allows capacity expansion without replacing existing hardware. Up to nine units stack for three-phase operation; up to ten run in parallel for single-phase or split-phase configurations, reaching up to 36kW in a grid-tied 24V or 48V system. Each unit connects with other OutBack Power electronics—charge controllers, the MATE3s system controller, and HUB communications—through a unified architecture. Paired with a MATE3s, the VFXR2812A gains access to OPTICS RE for remote monitoring and system control from any location.

System compatibility

The VFXR2812A operates on a 12VDC battery bank with a 10.5–17VDC input range and supports flooded, gel, AGM, lithium-ion, and flow battery chemistries with advanced multi-stage charging profiles. A remote temperature sensor is included for charge compensation. AC input voltage and frequency limits are adjustable via the MATE3s system controller. The unit integrates natively with OutBack's HUB communications bus, MATE3s display and controller, FlexPower enclosures, and compatible MPPT charge controllers for a fully coordinated system.

Why choose the OutBack Power VFXR2812A?

The OutBack Power VFXR2812A is the right choice for 12V system builders who need a hybrid solar inverter charger that can operate across extreme environmental conditions, scale modularly as their system grows, and handle grid-interactive modes—including GridZero—without a separate transfer switch or external control system. Backed by UL1741 and CSA certification, a 125ADC battery charger, and OutBack's deep integration ecosystem, the VFXR2812A delivers the reliability that mission-critical and off-grid installations require.