EG4 Wall Mount, 48 Volt 314 AH Heated Lithium Battery, Outdoor, 16 kWh UL1973, UL9540A
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Visit CalculatorThe EG4 Wall Mount, 48 Volt 314 AH Heated Lithium Battery, Outdoor, 16 kWh UL1973, UL9540A 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.

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.


Everything you need is included with your product.
| 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 |
| 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 |
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.
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