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Big Battery EG4 8kW (12kPV) Hybrid Inverter - INV028

Big Battery EG4 8kW (12kPV) Hybrid Inverter - INV028

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Big Battery EG4 8kW (12kPV) Hybrid Inverter - INV028

This cutting-edge 8K (12kPV) Hybrid Inverter from EG4 is a versatile, all-in-one inverter and charger, capable of supporting even the most robust home power systems with a rated power of 8000W and the ability to handle PV arrays of up to 12000W. This high-tech inverter guarantees a simple, plug-and-play installation, and comes equipped with an in-depth LCD touch screen interface and remote monitoring capabilities for enhanced visibility and a smoother user experience during operation, as well as 2 MPPT inputs, built-in circuit breakers, and an integrated UPS module for seamless input switching in 20ms or less. Plus, by leaving behind outdated transformer-based designs, this 12K inverter is able to remain lightweight and energy-efficient, consuming minimal power during idling periods, without having to compromise on surge capacity or line imbalance capabilities.

This cutting-edge inverter supports a variety of working modes and system configurations, so whether you’re looking to enhance your home’s solar system, or upgrade your homestead’s off-grid ESS setup, this inverter can handle a wide range of home power applications. Plus, through its smart load control, AC coupling abilities, and peak shaving function, you can meet your power needs and protect your home against unstable grids and rolling blackouts, while seeing huge savings each month on your electric bill. Order today to optimize your home’s power with the state-of-the-art 8K (12kPV) All-in-One Inverter & Charger from EG4.

Specifications
Nominal AC Voltage 120/240VAC
Frequency 50 Hz
Max AC Input Power 12,000 W
Max AC Bypass 200A
Min Generator Size 5,000 W
**Max Passthrough Current (Generator Grid)**
Output Voltage 120/240VAC
Max Output Current 33.3A @ 240VAC
Nominal Output Power 8,000 W
Output / Operating Frequency 50 Hz
Surge Capacity 16,000 W (0.5 sec) / 12,000 W (1 sec) / 10,000 W (1 min) / 8,800 W (12 min)
Max Continuous Line Wattage 4,000 W
Power Factor 0.99 (Full Load)
Reactive Power Adjustment Range -0.8 – 0.8
Total Harmonic Distortion (THD) <3% (Full Load)
Transfer Time 10 – 20 ms (Single) / 20 ms (Parallel)
Max Continuous Output Current (Secondary) 50A
AC Bypass (Generator) 90A
Output Voltage (Secondary) 120V AC / 240V AC
Output Power (Secondary) 12,000 W
Max Continuous Line Wattage (Secondary) 8,000 W (per 120V)
Operating Voltage Range 180 – 270V AC
Output Frequency 50 Hz / 60 Hz
Max Output Power (with PV) 14,700 W (10 min) / 15,500 W (5 min)
Max Output Power (without PV) 13,500 W (10 min)
Total Harmonic Distortion (Voltage) <5%
Switching Time 10 ms
Number of MPPTs (Inputs per MPPT) 2 (2)
Max Input Current (per MPPT) 25A
Max Short Circuit Input Current (per MPPT) 31A
DC Input Voltage Range 100 – 600 VDC
Start Up Voltage 100 VDC
MPPT Operating Voltage Range 120 – 500 VDC
Nominal MPPT Voltage 360 VDC
Max PV Array Power 12,000 W
Max Recommended PV Input 15,000 W
Max Efficiency 99.9% (PV→Battery) / 97.5% (PV→Grid) / 94% (Battery→Grid) / 96.4% (CEC Weighted)
Idle Consumption (Standby Mode) <55 W
Nominal Battery Voltage 48 VDC
Battery Voltage Range 40 – 60 VDC
Max Charge / Discharge Current 167A @ 48 VDC
Recommended Battery Capacity per Inverter >200 Ah
Operating / Storage Temperature Range -13ºF – 140ºF (-25ºC – 60ºC)
Altitude <6,561 ft (2000 m)
Relative Humidity 0 – 100%
Typical Noise Emission <50 dB @ 3 ft
Protection Rating IP66 / NEMA 4X
Communications RS485 / CANBus / WiFi
Max Parallel Connections 10

Dimensions
Weight 110 lbs (50 kg)
Depth 11.2 in (285 mm)
Width 20.5 in (520 mm)
Height 29.5 in (750 mm)
What our Experts Think
  • All‑in‑one hybrid inverter system — Combines inverter, MPPT solar charge controller, and AC backup/transfer capabilities — reducing the need for multiple separate components.

  • Balanced power capacity — Provides up to 8 kW of continuous AC output while managing up to 12 kW of solar PV input—suitable for small-to-medium homes, cabins, or off-grid setups.

  • Flexible operation modes — Capable of battery‑based backup, solar‑+‑grid hybrid, or full off‑grid operation, offering flexibility depending on your installation and power needs.

  • Scalable and expandable — Can be paired with compatible battery banks and PV arrays; supports future upgrades as system demands grow.

  • Smart integration & control — Built‑in monitoring and communication interfaces (e.g. CAN/RS485, WiFi-ready) allow easy system management and compatibility with modern battery systems.

Q&A

Q: What is the BigBattery EG4 8kW (12kPV) Hybrid Inverter (INV028)?
A: An all-in-one 48 V hybrid inverter, charger, and solar controller that manages solar PV input, battery charging, and AC output — ideal for homes, off-grid, and solar + battery systems.

Q: What are its main power capabilities?
A: Supports up to 12 kW of solar PV input and provides up to 8 kW continuous AC output (split-phase 120/240 V).

Q: What types of power setups does it support?
A: Grid-tied, off-grid, and hybrid configurations, allowing flexible combinations of PV, battery, and grid power.

Q: What features make it flexible and user-friendly?
A: Dual MPPT inputs, UPS-style fast transfer switch, AC-coupling, smart load control, peak shaving, transformerless high-efficiency design, and compatibility with lithium or lead-acid batteries.

Q: Can the system be expanded for higher power needs?
A: Yes, multiple units can be paralleled to scale output for larger homes or light commercial applications.

Q: What monitoring and control options are available?
A: LCD touchscreen interface and remote monitoring via Wi-Fi/RS485/CAN for real-time system management.

Q: What safety features are included?
A: Over/under-voltage protection, surge protection, PV ground-fault and arc-fault detection, rapid shutdown compliance, and AC bypass or generator compatibility.

Maintenance Tips
  • Install the inverter in a cool, dry, and well-ventilated area to prevent overheating and ensure stable performance.

  • Regularly inspect wiring, terminals, and connections for looseness, corrosion, or damage to maintain safe and efficient operation.

  • Keep the exterior clean and dust-free with a soft, dry cloth to avoid heat buildup.

  • Avoid exposure to direct sunlight, moisture, and extreme temperatures to protect internal components.

  • Ensure firmware is up-to-date for optimal efficiency and compatibility with connected battery and PV systems.

  • Disconnect from power sources during extended non-use to preserve internal electronics.