by BigBattery

BigBattery EG4 FlexBOSS21 Hybrid Solar Inverter with Remote Wifi Monitoring - INV027

SKU INV027

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$5,058.76

$5,058.76 - $5,058.76

$5,058.76

$4,199.00

$4,199.00 - $4,199.00

$4,199.00

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BigBattery EG4 FlexBOSS21 Hybrid Solar Inverter with Remote Wifi Monitoring - INV027 delivers powerful and efficient energy management for residential or commercial solar systems. Designed to seamlessly integrate with your PV array, this hybrid inverter supports up to 21kW of solar input and 12kW of AC output, making it ideal for large-scale applications. With its advanced remote WiFi monitoring and compatibility with EG4 battery systems, the FlexBOSS21 ensures real-time performance tracking and optimal energy usage. Whether you’re going off-grid or building a hybrid setup, this inverter offers smart power management and dependable performance.

Features:

12kW continuous output power with up to 21kW PV input
Built-in remote WiFi monitoring for real-time system access
Hybrid functionality: supports grid-tie, off-grid, and battery backup modes
Compatible with EG4 battery systems and other 48V LiFePO4 batteries
User-friendly LCD display and mobile app for convenient control
Scalable and stackable design for large system builds
Includes wall-mount bracket and pre-wired AC input/output

Specifications

Specification	Details
Nominal AC Voltage	120/240VAC; 120/208VAC (L1/L2/N required)
Frequency	60 Hz (Default); 50 Hz
Max. AC Current	50A @ 240V; 57.7A @ 208V
Max. AC Input Power	12000W
Max. AC Bypass	90A
Max. Output Current	66.7A
Output Voltage	120/240VAC; 120/208VAC (L1/L2/N required)
Operating Voltage Range	180 – 270VAC
Nominal Output Power (with PV)	16000W @ 240V; 13800W @ 208V
Nominal Output Power (without PV)	12000W @ 240V; 12000W @ 208V
Output Frequency	60 Hz (Default); 50 Hz
Power Factor	0.99 (Full Load)
Reactive Power Adjustment Range	-0.8 to +0.8 Leading Adjustable
Total Harmonic Distortion	<5% (Full Load)
Transfer Time	20ms (Default); 10ms (Configurable); 20ms (Parallel)
Rated Output Current	50A @ 240V; 57.7A @ 208V
Peak Power	24000W (0.5 sec); 18000W (1 sec); 15000W (6 min); 13200W (12 min)
Number of MPPTs	3
Inputs per MPPT	2 (MPPT 1); 2 (MPPT 2); 1 (MPPT 3)
Max. Usable Input Current	26A (MPPT 1 & 2); 15A (MPPT 3)
Max. Short Circuit Input Current	31A (MPPT 1 & 2); 19A (MPPT 3)
DC Input Voltage Range	100 – 600VDC
MPPT Operating Voltage Range	120 – 440VDC
Nominal MPPT Voltage	360VDC
Max. Utilized PV Array Power	21000W
Max. Recommended PV Input	25000W
Max. Efficiency	97% (PV to Grid); 94.5% (PV to Battery); 94% (Battery to Grid)
Idle Consumption	<65W
Nominal Battery Voltage	48VDC
Battery Voltage Range	40 – 60VDC
Max. Charge / Discharge Power	12000W
Recommended Battery Capacity	>300Ah
Operating Temperature Range	-13ºF to 140ºF (-25ºC to 60ºC)
Storage Temperature Range	-13ºF to 140ºF (-25ºC to 60ºC)
Operating Altitude	<6561 ft (2000 m)
Relative Humidity	0 – 100%
Typical Noise Emission	<50dB @ 3 ft
Protection Rating	IP65 / NEMA 4X
Design Topology	High-Frequency / Transformerless
Communication Interfaces	RS485 / CANBus / WiFi
Max. Parallel Connections	16
Dimensions (H x W x D)	30.5 x 22.3 x 11.3 in (775 x 567 x 287 mm)
Weight	88 lbs (40 kg)