BigBattery, K0218, EG4-WallMount Indoor Battery ESS | 48V 314Ah | 16kWh | EG4 FlexBOSS18 Hybrid Inverter, 1x EG4 FlexBOSS18 + 3x 314Ah Indoor

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BigBattery, K0218, EG4-WallMount Indoor Battery ESS | 48V 314Ah | 16kWh | EG4 FlexBOSS18 Hybrid Inverter, 1x EG4 FlexBOSS18 + 3x 314Ah Indoor

Model: K0218
Manufactured by: BigBattery
Condition: New
Estimated Delivery: May 4th - May 10th
In Stock
Out of Stock

Price:

$19,493.50 $14,995.00

Manufacturer Info

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The EG4 314Ah Indoor Battery + EG4 FlexBOSS18 ESS System delivers smart power, simple reliability, and scalable energy independence for both on-grid and off-grid applications. Combining the high-capacity 16kWh EG4 WallMount Indoor LiFePO? battery with the powerful FlexBOSS18 hybrid inverter, this system provides dependable whole-home backup and efficient energy management in a clean, space-saving design.

The FlexBOSS18 supports up to 18,000W PV input with dual MPPTs and 120/240V split-phase output, enabling flexible system design and strong performance. Paired with the EG4 314Ah battery – featuring 200A continuous output, 8,000+ cycle life, and third-generation BMS technology – this system ensures stable, high-performance energy delivery for residential and small commercial use.

Designed withUL 9540 certified configurations, advanced battery management, andU.S.-engineered components, this system ensures safe, maintenance-free performance with seamless closed-loop communication between battery and inverter.

Ships From: Texas, USA
Warranty: 10 Years (Battery), 10 Years (Inverter)
Support: Lifetime USA-Based Tech Support

Compatibility

Integrated & Optimized System

EG4 314Ah Indoor Battery + EG4 FlexBOSS18 Hybrid Inverter

Expandable & Flexible

Cross-compatible with other EG4 battery systems
Scalable energy storage for growing system needs
Supports grid-tied, hybrid, and off-grid installations
Key Features
Complete ESS Solution – Battery + inverter system designed to work seamlessly together
18,000W PV Input – High solar capacity with dual MPPT optimization
120/240V Split-Phase Output – Reliable power for residential and commercial loads
16kWh LiFePO? Battery (314Ah) – High-density, safe lithium storage
200A Continuous Output (~9.6kW) – Supports whole-home and critical loads
8,000+ Cycle Life – Long-lasting performance at 80% DoD
Advanced 3rd-Gen BMS – Improved monitoring, faster response, and precise balancing
Auto-ID Technology – Simplifies installation and system configuration
Self-Heating Function – Reliable performance in cold climates
Closed-Loop Communication – Seamless coordination between battery and inverter
GridBOSS Integration – Advanced load management, AC coupling, and generator support
Wall or Floor Mount Design (IP20) – Flexible, space-saving indoor installation
Maintenance-Free Operation – No routine servicing required

A high-capacity, intelligent energy storage system built for performance, flexibility, and long-term energy independence – with the reliability and control modern energy systems demand.

Battery 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 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.