Product Summary:

The EG4 280Ah WallMount Indoor LiFePO₄ Battery is a high-capacity, UL-certified energy storage solution designed for residential and commercial ESS applications. Delivering 14.3kWh of storage, it provides reliable, long-lasting performance for home backup, energy savings, and off-grid systems.

 

Built with advanced LiFePO₄ battery chemistry, this system offers 8,000+ cycles at 80% depth of discharge, ensuring exceptional lifespan and value. An intelligent Battery Management System (BMS) with real-time monitoring and an integrated LCD touchscreen allows for easy system visibility and control.

 

Designed for safety and efficiency, the battery features automatic self-heating for cold climates and an emergency stop (E-Stop) for rapid shutdown when needed. With RS485 and CANBus communication, it integrates seamlessly with leading hybrid inverters for flexible grid-tied and off-grid installations.

Ships From: Texas, USA
Warranty: 10 Years
Support: Lifetime USA-Based Tech Support

 

Compatibility

UL 9540 Certified + Closed-Loop Communication (Grid-Tied):

  • EG4 12kPV
  • EG4 18kPV

  • EG4 FlexBoss18

  • EG4 FlexBoss21

Closed-Loop Communication (Off Grid Non-UL 9540 Installs):

  • All BigBattery APEX Inverters

  • All EG4 Inverters

Key Features
  • 14.3kWh LiFePO₄ Battery – Safe, high-capacity lithium storage
  • 8,000+ Cycle Life – Long-lasting performance at 80% DoD
  • UL-Certified Design – Built for safe, code-compliant installations
  • Advanced BMS Monitoring – Real-time performance tracking and protection
  • LCD Touchscreen Display – Easy system control and diagnostics
  • Automatic Self-Heating – Reliable operation in cold environments
  • Emergency Stop (E-Stop) – Rapid shutdown for enhanced safety
  • RS485 & CANBus Communication – Seamless inverter integration
  • Wall-Mount Indoor Design – Clean installation for homes and commercial spaces
  • Maintenance-Free Operation – No routine servicing required

A safe, efficient, and easy-to-install battery solution built for long-term performance and dependable energy storage.

EG4 Indoor revolutionizing home power
EG4 Indoor Features
UL Certified
EG4 Indoor Features 
Power that never sleeps at night
Simple system expansion with inverters
GridBoss

.

See More On YouTube

Battery Downloads

SKU#:FEWMT-48143-G1
Spec Sheet:DownloadDOWNLOAD
Quick Start Guide:DownloadDOWNLOAD
UL9540A Certificate:DownloadDOWNLOAD
UL1973 Certificate:DownloadDOWNLOAD
Connection Guide:DownloadDOWNLOAD
Monitoring & Settings Guide:DownloadDOWNLOAD
Maintenance Guide:DownloadDOWNLOAD
Firmware Update Guide:DownloadDOWNLOAD
CEC Listing- EG4 WallMount Indoor:Go to linkGO TO LINK

Battery Specifications

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
Voltage:56V
Power Consumption:224W
Internal Temperature Cutoffs:≤32ºF (On) | ≥41ºF (Off)
Charging Temperature Range:32ºF – 113ºF (0ºC – 45ºC)
Discharging Temperature Range:-4ºF – 122ºF (-20ºC – 50ºC)
Storage Temperature Range:-4ºF – 122ºF (-20ºC – 50ºC)
Protection Rating:IP20
Communications:RS485 | CANBus
Weight:282.2 lbs (128 kg)
Depth:9.6 in (245 mm)
Width:18.1 in (460 mm)
Height:36.4 in (925 mm)

Compare Battery

10-Year EG4 Manufacturer Warranty

EG4 Indoor revolutionizing home power
EG4 Indoor Features
UL Certified
EG4 Indoor Features 
Power that never sleeps at night
Simple system expansion with inverters
GridBoss

.

See More On YouTube

Battery Downloads

SKU#:FEWMT-48143-G1
Spec Sheet:DownloadDOWNLOAD
Quick Start Guide:DownloadDOWNLOAD
UL9540A Certificate:DownloadDOWNLOAD
UL1973 Certificate:DownloadDOWNLOAD
Connection Guide:DownloadDOWNLOAD
Monitoring & Settings Guide:DownloadDOWNLOAD
Maintenance Guide:DownloadDOWNLOAD
Firmware Update Guide:DownloadDOWNLOAD
CEC Listing- EG4 WallMount Indoor:Go to linkGO TO LINK

Battery Specifications

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
Voltage:56V
Power Consumption:224W
Internal Temperature Cutoffs:≤32ºF (On) | ≥41ºF (Off)
Charging Temperature Range:32ºF – 113ºF (0ºC – 45ºC)
Discharging Temperature Range:-4ºF – 122ºF (-20ºC – 50ºC)
Storage Temperature Range:-4ºF – 122ºF (-20ºC – 50ºC)
Protection Rating:IP20
Communications:RS485 | CANBus
Weight:282.2 lbs (128 kg)
Depth:9.6 in (245 mm)
Width:18.1 in (460 mm)
Height:36.4 in (925 mm)

Compare Battery

10-Year EG4 Manufacturer Warranty

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