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
CompatibilityIntegrated & 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.
Inverter Specifications - Model: IV-13000-HYB-AW-FX-XX (48 V battery input) {Split-phase 120/240 VAC}
- Type: Hybrid, High-Frequency — Transformerless
- Nominal Voltage: 120/240 VAC (Split-phase) or 120/208 VAC
- Frequency: 50/60 Hz
- Phase Support: 1ø (Split-phase)
- Nominal Output Voltage: 120/240 VAC; 120/208 VAC (L1/L2/N required)
- Continuous Output – Battery Only: 10 kW (? 41.66 A @ 240 V)
- Continuous Output – PV + Grid: 13 kW (? 54 A @ 240 V)
- Peak / Surge Power: Data not fully specified in summary
- Nominal Grid Voltage: 120/240 VAC or 120/208 VAC
- Max Grid Input Circuit: 90 A pass-through capability
- Nominal Voltage: 48 VDC
- Max Charge/Discharge Current: Data not explicitly shown in overview
- # of MPPTs: 2 MPPTs
- Rated Current per MPPT: ~26 A each
- Max DC Input Voltage*: 600 VDC
- Recommended Max. Solar Array Power (STC): 18 kW usable; up to 24 kW max input
- CEC Weighted Efficiency: Approximately 97%
- Display: Optional Screen Kit (plug-in)
- Remote Connectivity: Wi-Fi dongle included; App/Web / Monitoring platform
- Operating Temperature Range: -13° – 140 °F (-25° – 60 °C)
- Storage Temperature Range: -13° – 140 °F (-25° – 60 °C)
- Operating Humidity: 0-95% RH (non-condensing)
- Max Altitude of Operation: < 6,561 ft (? 2,000 m)
- Enclosure Rating: NEMA 4X
- Cooling Method: Fans (Active Cooling)
- Noise: < 50 dB @ 3 ft
- Dimensions (H × W × D): 29.52 × 20.47 × 10.43 in (750 × 520 × 265 mm)
- Unit Weight: ~115 lbs (? 52 kg)
- Mounting: Wall mount
- Max # of Inverters in Parallel: Up to 10 units
- Certifications: UL 1741 SA/SB, IEEE 1547 / CSA 22.2 107.1 / CSA 22.2 330-17
- EMP Hardened: Yes
- AC Input Breaker: 90 A pass-through capability
- PV Input Breaker: Not explicitly specified in summary
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