EG4 | WallMount Indoor Battery | 48V 314Ah | 16kWh | UL9540A | Self-Heating | FEWMT-48161-G1

EG4 WallMount Indoor 314Ah LiFePO₄ Battery 

The EG4 WallMount Indoor 314Ah LiFePO₄ Battery is a high-capacity energy storage solution designed for residential, commercial, off-grid, and backup power applications. Featuring 16kWh of nominal energy capacity, a 51.2V nominal voltage, and 314Ah capacity, this battery provides reliable, long-lasting energy storage for modern solar and energy storage systems. Its 12.86kWh recommended usable capacity at 80% depth of discharge (DoD) helps balance usable energy with long-term battery life.

Built with Lithium Iron Phosphate (LiFePO₄/LFP) chemistry, the battery is engineered for durability and long-term operation. It offers a rated cycle life of 10,000 cycles at 80% DoD and 25°C, with a design life of 10 years. The battery supports up to 200A of continuous discharge current, with a maximum continuous charge current of 157A and up to 12.8kW of peak power for 3 seconds. Its 95% round-trip efficiency helps maximize the usable energy stored and delivered by the system.

Advanced Battery Management & Protection

An integrated active-balancing Battery Management System (BMS) continuously monitors and helps protect the battery against over-voltage, under-voltage, over-current, short circuits, and high or low temperatures. The system also includes a 250A battery breaker and supports RS485 and CAN communication for integration with compatible energy storage equipment.

The battery supports up to 16 units in parallel, providing a scalable solution for larger energy storage requirements. Compatible systems include EG4 FlexBOSS 18, FlexBOSS 21, 12kPV, and other supported EG4 ESS configurations, with closed-loop communication available for compatible installations.

Durable & Flexible Installation

Designed for indoor energy storage applications, the battery can be installed using wall- or floor-mount configurations. Natural convection cooling helps simplify operation without requiring an active cooling system. The enclosure features an IP20 rating, while the system is designed to operate at temperatures from 32°F to 122°F (0°C to 50°C) while charging and -4°F to 131°F (-20°C to 55°C) while discharging.

The battery measures approximately 34.1" H × 18.1" W × 9.6" D and weighs approximately 293.2 lbs (133 kg). It supports operation at altitudes up to 9,843 ft (3,000 m) and relative humidity from 5%–95% non-condensing.

Key Features

• 16kWh Nominal Energy Capacity
• 314Ah Capacity
• 51.2V Nominal Voltage
• 12.86kWh Recommended Usable Energy at 80% DoD
• 200A Maximum Continuous Discharge Current
• 157A Maximum Continuous Charge Current
• 12.8kW Peak Power for 3 Seconds
• 95% Round-Trip Efficiency
• 10,000-Cycle Life at 80% DoD
• 10-Year Design Life
• Up to 16 Units in Parallel
• Integrated Active-Balancing BMS
• 250A Battery Breaker
• RS485 & CAN Communication
• Wall- or Floor-Mount Installation
• Natural Convection Cooling
• IP20 Enclosure Rating
• UL 1973 Certified
• UL 9540 / UL 9540A Compatible Configurations
• UN 38.3 Certified
• FCC Part 15 (EMC) Compliant

10-Year EG4 Manufacturer Warranty

The EG4 WallMount Indoor 314Ah LiFePO₄ Battery is backed by a 10-year EG4 manufacturer warranty or 10,000 cycles, providing long-term coverage and confidence in the battery's durability and performance.