EG4-WallMount 314Ah Indoor Battery | 48V | 16kWh | UL9540A | Self-Heating

Designed for safe indoor installation, the battery features automatic self-heating for cold environments 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 applications.

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

Compatibility

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

EG4 FlexBoss18

EG4 FlexBoss21

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

All BigBattery APEX Inverters

All EG4 Inverters

Key Features

• 16kWh LiFePO₄ Battery – High-capacity, safe lithium storage
• 200A Continuous Output – Powers whole-home loads and critical systems
• 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, space-saving installation
• Maintenance-Free Operation – No routine servicing required

A powerful, space-efficient battery solution built for reliable backup, energy savings, and long-term performance.

Downloads & Specifications

Product Type:Low Voltage LFP Battery

Battery Type:Lithium Iron Phosphate (LFP)

Model Number:WM-48-314-IN-XX (XX is a number between 00 – 99)

Nominal Energy Capacity:16kWh

Usable Energy (DOD%):12.86kWh (80% recommended)

Voltage Range:47.5 – 57.6 VDC

Nominal Voltage:51.2 VDC

Capacity:314Ah

Charging Voltage Range:56 – 57 VDC

Discharging Cut-off Voltage:47.5 VDC

Max Continuous Charge Current:157A

Max Continuous Discharge Current:200A

Continuous Charge/Discharge Power:8/10.2 kW

Recommended Charging/Discharging Rate:0.5C

Peak Power:12.8kW (3 sec)

Round-trip Efficiency:95%

Max Parallel Units:16

Protection Features:Over/Under Voltage, Over-Current, Short Circuit, High/Low Temp

Battery Management System (BMS):Integrated, Active Balancing

Communication Protocols:RS485, CAN

Battery Breaker:250A

Storage Temperature Range**:-4 – 131°F (-20 – 55°C)

Humidity Range:5% – 95% RH (non-condensing)

Altitude:9843 ft. (<3000 m)

Cooling Method:Natural Convection

Dimensions (H × W × D):34.1 in. × 18.1 in. × 9.6 in. (865 mm × 460 mm × 245 mm)

Operating Temperature Range:Charge: 32 – 122°F (0 – 50°C); Discharging: -4 – 131°F (-20 – 55°C)

Recommended DOD Setting Note*:EG4 recommends this value be set no lower than 20% to maintain the recommended 80% Depth of Discharge.

Storage Temperature Note**:Less than 3 months of storage. If longer than 3 months, recommended storage temperature will be 59°F – 86°F (15°C – 30°C).

Weight:293.2 lbs. (133 kg)

Enclosure Rating:IP20

Mounting Options:Wall/Floor mount

Display/Indicators:LED Status

Connector Type:Degson quick connector/screw terminal

UL 1973:Yes

UL 9540:DC ESS, AC ESS with EG4 18kPV, 12kPV, FlexBOSS 21, FlexBOSS 18*

UL 9540A:Batt to Batt spacing of 6 in.

UN 38.3:Yes

FCC Part 15 (EMC):Yes

Protection Class:Class B

Cycle Life (70% EOL Capacity):10000 cycles @ 0.5C, 25°C, 80% DOD

Design Life*:10 years

Warranty:10 years or 10000 cycles

Application Type:Residential/Commercial/Off-grid/Backup

Lifetime Energy Throughput (Calculated):(51.2V×314Ah/1000×80%×10000/1000)90% = 115.7 MWh or (12861 kWh×10000 cycles×90% efficiency) = 115.7 MWh

Note:Information subject to change without notice.

Battery Downloads

SKU#:FEWMT-48161-G1

Spec Sheet:DOWNLOAD

User Manual:DOWNLOAD

Quick Start Guide:DOWNLOAD

Certification of Compliance:DOWNLOAD

Certification of Conformity:DOWNLOAD

Warranty

EG4 WallMount Indoor Battery: 10-Year EG4 Manufacturer Warranty