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EG4 48V WallMount Indoor LiFePO4 Battery (14.3kWh-57.3kWh) + FlexBoss21 16kW (21kPV) Hybrid Inverter
by EG4

EG4 48V WallMount Indoor LiFePO4 Battery (14.3kWh-57.3kWh) + FlexBoss21 16kW (21kPV) Hybrid Inverter

SKU: K0106
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$9,523.74
$9,523.74 - $28,216.16
$9,523.74
$7,618.99
$7,618.99 - $22,572.93
$7,618.99
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Bundle Options: 1 x Indoor Battery + FlexBOSS21 16kW Inverter

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Off Grid Stores is an authorized retailer of EG4 products. Because of this, we pass on EG4's manufacturer warranty to you.

Product Highlights

Suitable For

  • RESIDENTIAL POWER SYSTEMS
  • HOME SOLAR SYSTEMS
  • CABINS & TINY HOMES
  • FAMILY HOMES & MANSIONS
  • OFF-GRID HOMESTEADS
  • EMERGENCY POWER
  • WHOLE HOME BACKUP
  • COMMERCIAL SYSTEMS
  • WHOLE OFFICE BACKUP
  • LEAD ACID REPLACEMENT

Features

  • WALL-MOUNTABLE DESIGN
  • AUTOMATIC SELF-HEATING
  • TOUCH SCREEN LCD DISPLAY
  • PASSIVE CELL BALANCING
  • INTEGRATED 600A BUSBARS
  • DUAL INTERNAL FIRE ARRESTORS
  • EMERGENCY DISCONNECT FUNCTION
  • ZERO MAINTENANCE REQUIRED
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EG4 48V WallMount Indoor LiFePO4 Battery (14.3kWh-57.3kWh) + FlexBoss21 16kW (21kPV) Hybrid Inverter

EG4 48V WallMount Indoor LiFePO4 Battery (14.3kWh-57.3kWh) + FlexBoss21 16kW (21kPV) Hybrid Inverter


Introducing the game-changing 48V 14.3kWh WallMount Indoor Battery, the latest solution from the EG4 team for residential and commercial ESS. This UL-certified, wall-mountable battery delivers reliable, efficient power for any home or business, helping you achieve significant lifetime savings on your utility bills or even full grid independence.

Designed with safety, longevity, and visibility in mind, this battery boasts a lifespan of over 8,000 cycles at 80% DoD—equivalent to 82.6MWh of lifetime energy production. It uses LiFePO4 cells, the safest battery chemistry available today, housed in a durable IP20-rated casing. The intelligent BMS continuously monitors module and cell voltage, current, and temperature in real time, with passive cell balancing to optimize performance and extend battery life. An LCD touchscreen display on the side keeps you informed of your battery’s status every day. For added safety, the unit includes an automatic self-heating function, dual fire extinguishers, and an innovative emergency stop feature that allows you to disconnect the entire system instantly in case of an emergency.

Paired with the cutting-edge FLEXBOSS21 EG4 hybrid inverter, this system features three MPPT inputs, an integrated UPS module for seamless on- and off-grid switching, and can handle PV arrays up to 21,000W. Additional features like ATS, backup mode, and peak shaving ensure stable power supply and protection against unstable grids or blackouts, while helping you save on your electric bill.

Whether you’re equipping your home with a powerful solar system or ensuring emergency backup power, the EG4 WallMount Indoor offers reliable, efficient energy day in and day out. Take control of your home’s power and experience the benefits of the new 48V EG4 ESS Systems today.

Specifications:

EG4 48V 14.3kWh WallMount Indoor Battery
System Voltage 48V
Nominal Voltage 51.2V
Chemistry LiFePO4
kWh Capacity 14.3kWh
Ah Capacity 280Ah
BMS Charging Voltage (Bulk/Absorb) 56V (±0.8V)
Rec. Charging Voltage (Bulk/Absorb) 56.2V (±0.2V)
Rec. Float Setting 54V (±0.2V)
Rec. SoC Cutoff Setting 20%
Max. Continuous Charge/Discharge Current 200A
Rec. Charge Current 60 – 160A
Rec. Discharge Current 160A
Max Continuous Discharge Rate 10240W
HEATER
Voltage 56V
Power Consumption 224W
Internal Temperature Cutoffs ≤32ºF (On) | ≥41ºF (Off)
OPERATING ENVIRONMENT
Charging Temperature Range 32ºF – 113ºF
Discharging Temperature Range -4ºF – 122ºF
Storage Temperature Range -4ºF – 122ºF
Protection Rating IP20
Communications RS485 | CANBus
DIMENSIONS
Weight 282.2 lbs
Depth 9.6 in
Width 18.1 in
Height 36.4 in
EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter
AC INPUT
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
AC GRID OUTPUT
Operating Voltage Range 180 - 270VAC
Output Voltage 120/240VAC | 120/208VAC (L1/L2/N required)
Max. Output Current 66.7A
Output Frequency 60 Hz (Default) | 50 Hz
Nominal Output Power (without PV) 12000W @ 240V | 12000W @ 208V
Nominal Output Power (with PV) 16000W @ 240V | 13800kW @ 208V
Power Factor 0.99 (Full Load)
Reactive Power Adjustment Range -0.8 - 0.8 Leading Adjustable
Total Harmonic Distortion <5% (Full Load)
Transfer Time 20ms (Default) | 10ms
(Configurable) | 20ms (Parallel)
AC BACKUP / UPS OUTPUT
Rated Output Current 50A @ 240V | 57.7A @ 208V
Nominal Output Voltage 120/240VAC | 120/208VAC
Rated Output Power 12000W @ 240VAC | 12000W @ 208VAC
Peak Power 24000W (0.5 sec) | 18000W (1 sec)
15000W (6 min) | 13200W (12 min)
Operating Frequency 60 Hz (Default) | 50 Hz
Total Harmonic Distortion Voltage <5%
Transfer Time 20ms (Default) | 10ms (Configurable)
| 20ms (Parallel
PV INPUT
No. of MPPTs 3
Inputs per MPPT 2 (MPPT 1) | 2 (MPPT 2) | 1 (MPPT 3)
Max. Usable Input Current 26A (MPPT 1) | 26A (MPPT 2) | 15A (MPPT 3)
Max. Short Circuit Input Current 31A (MPPT 1) | 31A (MPPT 2) | 19A (MPPT 3)
DC Input Voltage Range 100 - 600VDC
Unit Start-Up Voltage 100VDC
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
BATTERY
Nominal Voltage 48VDC
Voltage Range 40 - 60VDC
Max. Charge / Discharge Power 12000W
Recommended Battery
Capacity per Inverter		 >300Ah
OPERATING ENVIRONMENT
Operating / Storage Temperature Range -13ºF - 140ºF
Operating Altitude <6,561 ft (2000 m)
Relative Humidity 0 - 100%
Typical Noise Emission <50dB @ 3 ft
Design Topology High-Frequency / Transformerless
Protection Rating IP65 / NEMA 4X
Communications RS485 / CANBus / WiFi
Max. Parallel Connections 16
DIMENSIONS
Weight 88 lbs
Depth 11.3 in
Width 22.3 in
Height 30.5 in

PACKAGE INCLUDES

EG4 48V 14.3kWh WallMount Indoor LiFePO4 Battery + FlexBoss21 16kW (21kPV) Hybrid Inverter

EG4 48V 14.3kWh WallMount Indoor Battery

x 1

Mounting Bracket

x 1

Concrete Expansion Bolts

x 6

Red & Black Battery to Inverter Power Cables (3.3 FT)

x 2

Battery to Inverter Comm Cable (5 FT)

x 1

EG4 Indoor Buildable Conduit Box

x 1

EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter

x 1

Product Documents:

EG4 48V 14.3kWh WallMount Indoor Battery User Manual

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EG4 48V 14.3kWh WallMount Indoor Battery User Manual

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EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter Certification Of Compliance

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EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter Specification Sheet

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EG4 FlexBOSS21 16kw 48V Split Phase AC Hybrid Inverter User Manual

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