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EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery | UL1973 & UL9540A

EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery | UL1973 & UL9540A

BY: EG4 | SKU: EG4LIFPOW4WMO-48V314A Availability: In Stock
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EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery | UL1973 & UL9540A

The EG4 16.1kWh All-Weather Wall-Mount Battery is a high-capacity 51.2V 314Ah LiFePO4 energy storage solution designed for residential and light commercial solar systems. Built for indoor or outdoor installation, this battery features integrated heating, advanced BMS protection, and RS485/CAN communication for seamless inverter integration.

With 16kWh nominal capacity, 8.0kW continuous output, and up to 32 units in parallel, it delivers scalable, reliable energy storage for off-grid and grid-tied applications.

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EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery Features

16.1kWh High-Capacity Storage - Large-format 314Ah LiFePO4 cells for long-duration backup and daily cycling.

All-Weather Heated Design - Integrated battery heater allows reliable operation in cold climates.

Advanced Integrated BMS - Over/under voltage, overcurrent, short circuit, and temperature protections built in.

Scalable System Expansion - Supports up to 32 units in parallel for large energy storage systems.

High Efficiency Performance - Up to 95% round-trip efficiency with 8.0kW continuous power.

Outdoor Rated (IP67 Enclosure) - Durable enclosure suitable for indoor or outdoor installations.

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EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery Applications

  • 16.1kWh High-Capacity Storage – 51.2V 314Ah LiFePO4 battery designed for residential solar and backup systems.
  • Built-In Heating System – Supports safe charging in cold climates.
  • Smart Integrated BMS – Active balancing with full voltage, current, and short-circuit protection.
  • 8kW Continuous Output – Reliable power for whole-home and high-demand applications.
  • Expandable Design – Supports up to 32 units in parallel for scalable energy storage.
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What's Included

Everything you need is included with your product.

  • 1 x EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery
  • 1 x Mounting Bracket
  • 1 x X Bracket
  • 6 x Expansion Bolt
  • 2 x Red & Black Battery to Inverter Power Cables (3.3 FT)
  • 1 x Battery to Inverter Comm Cable (5 FT)
  • 1 x User Manual

Warranty

  • 10-Year Manufacturer Warranty

EG4 16.1kWh 51.2V 314Ah All-Weather Wall-Mount Lithium Battery Specifications

Parameter Specification
Product Type LFP Battery
Battery Type Lithium Iron Phosphate (LiFePO4)
Model Number WM48314AWXX

ELECTRICAL CHARACTERISTICS

Parameter Specification
Nominal energy capacity 16kWh
Recommended usable energy (DOD%) 12.86kWh (80% recommended)
Recommended voltage range 47.5 – 56 VDC
Nominal voltage 51.2 VDC
Capacity 314Ah
Charging voltage range 56 – 57 VDC
Discharging cut-off voltage 44.8 VDC
Max continuous/recommended charge current 157A/157A
Max continuous/recommended discharge current 200A/157A
Continuous charge/discharge power 8/10.2 kW
Recommended charging/discharging rate 0.5C
Short circuit current 1700A, 15ms delay
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

BATTERY HEATER SPECIFICATIONS 

Parameter Specification Condition
Voltage 56V -
Power Consumption 448W -
Internal Battery Temperature ≤32°F (0°C)/≥37°F (3°C) Heat On/Heat Off

ENVIRONMENTAL SPECIFICATIONS 

Parameter Specification
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)

MECHANICAL SPECIFICATIONS 

Parameter Specification
Weight 309 lbs. (140 kg)
Enclosure rating IP67
Mounting options Floor mount/wall attached
Display/indicators LED Status
Connector type Degson quick connector/screw terminal

CERTIFICATIONS & COMPLIANCE

Parameter Specification
UL 1973 Yes
UL 9540 See https://eg4electronics.com/ for supported UL 9540 configurations
UL 9540A Yes

WARRANTY & LIFECYCLE 

Parameter Specification
Cycle life (70% EOL capacity) 10000 cycles @ 0.5C, 25°C, 80% DOD
Design life 10 years
Warranty 10 years or 10000 cycles
Lifetime production 122.2 MWh
Lifetime production Residential/Commercial/Off-grid/Backup

Frequently-Asked Questions

Is this battery suitable for outdoor installation?

Yes. It features an IP67-rated enclosure and integrated heating for cold climates.

How many batteries can be connected together?

Up to 32 units in parallel for large-scale energy storage systems.

Is this compatible with hybrid inverters?

Yes. It supports RS485 and CAN communication for inverter integration.

What is the expected lifespan?

The battery is rated for 10,000 cycles at 70% end-of-life capacity under recommended operating conditions.