EG4 48V WallMount 314Ah All-Weather Battery

Designed for safety and performance, the battery includes 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 installations.

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
• 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 high-capacity, reliable battery solution built for long-term performance, safety, and energy independence.

Downloads & Specifications

Product Type: LFP Battery

Battery Type: Lithium Iron Phosphate (LFP)

Model Number: WM48314AWXX (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: 32

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): 34.6 in. × 21.7 in. × 9.3 in. (880 mm × 550 mm × 235 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: 309lbs. (140 kg)

Enclosure Rating: IP67

Mounting Options: Wall attached /Floor mount

Display/Indicators: LED Status

Connector Type: Degson quick connector/screw terminal

UL 1973: Pending

UL 9540: Pending

UL 9540A: Pending

UN 38.3: Pending

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

Design Life*: 15 years

Warranty: 10 years or 10000 cycles

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

Lifetime Energy Throughput: 122.2MWh

Note: Information subject to change without notice.

Battery Downloads

SKU#:FEWAW-48161-G1

Spec Sheet:DOWNLOAD

User Manual:DOWNLOAD

Quick Start Guide:DOWNLOAD

Certification of Compliance:DOWNLOAD

Certification of Conformity:DOWNLOAD