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EG4 WallMount 314Ah All-Weather Battery + FLEXBOSS21

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K0280

$7,518.97
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EG4 314Ah All-Weather Battery + FlexBOSS21 ESS System | 16kWh LiFePO₄ Battery | 21kW PV Input | 16kW Hybrid Inverter

High-Capacity Hybrid Energy Storage System with 16kWh All-Weather Battery, FlexBOSS21 Inverter & Advanced Solar Energy Management

The EG4 314Ah All-Weather Battery + FlexBOSS21 ESS System is a premium energy storage solution designed to deliver exceptional performance for residential, commercial, hybrid, and off-grid applications. Combining the rugged 16kWh EG4 WallMount All-Weather LiFePO₄ battery with the powerful FlexBOSS21 hybrid inverter, this integrated system provides intelligent energy management, scalable storage capacity, and industry-leading solar production capabilities. With up to 21,000W of PV input, 16kW continuous output, three MPPT inputs, and seamless closed-loop battery communication, this system is engineered to maximize energy independence while providing reliable, maintenance-free operation in even the most demanding environments.

Key Features:

  • Complete ESS Solution: Fully integrated EG4 battery and FlexBOSS21 inverter designed for seamless operation and optimal performance.
  • 21,000W Solar Input Capacity: Supports large-scale solar arrays for maximum energy production and system flexibility.
  • 16kW Continuous Power Output: Delivers reliable power for whole-home backup, critical loads, and light commercial applications.
  • 16kWh LiFePO₄ Battery Storage: High-capacity lithium battery provides dependable long-duration energy storage.
  • Three Independent MPPT Inputs: Maximizes solar harvesting efficiency across multiple roof orientations and arrays.
  • 200A Continuous Battery Output: Supports demanding appliances, HVAC systems, and critical backup loads.
  • IP67 Outdoor-Rated Construction: Designed to withstand dust, water, and harsh outdoor conditions.
  • Advanced Smart BMS: Active cell balancing improves battery performance, efficiency, and long-term lifespan.
  • Integrated Self-Heating Technology: Maintains reliable operation and charging performance in cold climates.
  • Bluetooth & Wi-Fi Monitoring: Provides real-time performance tracking and over-the-air firmware updates.
  • GridBOSS Compatibility: Supports advanced load management, AC coupling, and generator integration.
  • 8,000+ Cycle Life: Engineered for long-term energy storage performance at 80% depth of discharge.

Ideal Applications:

  • Whole-home backup power systems
  • Residential solar energy storage
  • Light commercial energy management systems
  • Off-grid homes and remote properties
  • Grid-tied and hybrid solar installations
  • Generator-assisted backup power systems
  • Peak shaving and utility cost reduction

What’s Included:

  • 1 × EG4 314Ah All-Weather LiFePO₄ Battery (16kWh)
  • 1 × EG4 FlexBOSS21 Hybrid Inverter
  • Battery-to-Inverter Communication Components
  • Monitoring & Connectivity Interfaces
  • User Manuals & Installation Documentation

Specifications

Parameter Details
Battery Specifications
Product TypeLFP Battery
Battery TypeLithium Iron Phosphate (LFP)
Model NumberWM48314AWXX (XX = 00–99)
Nominal Energy Capacity16kWh
Usable Energy12.86kWh (80% recommended DOD)
Voltage Range47.5 – 57.6VDC
Nominal Voltage51.2VDC
Capacity314Ah
Charging Voltage Range56 – 57VDC
Discharging Cut-off Voltage47.5VDC
Max. Continuous Charge Current157A
Max. Continuous Discharge Current200A
Continuous Charge / Discharge Power8kW / 10.2kW
Recommended Charge / Discharge Rate0.5C
Peak Power12.8kW (3 sec)
Round-trip Efficiency95%
Max Parallel Units32
Protection FeaturesOver/Under Voltage, Over-Current, Short Circuit, High/Low Temperature
Battery Management SystemIntegrated BMS with Active Balancing
Communication ProtocolsRS485, CAN
Battery Breaker250A
Battery Environmental Specifications
Operating Temperature RangeCharge: 32°F – 122°F (0°C – 50°C)
Discharge: -4°F – 131°F (-20°C – 55°C)
Storage Temperature Range-4°F – 131°F (-20°C – 55°C)
Humidity Range5% – 95% RH (Non-Condensing)
Operating Altitude<9,843 ft (<3,000 m)
Cooling MethodNatural Convection
Enclosure RatingIP67
Battery Physical Specifications
Dimensions (H × W × D)34.6 × 21.7 × 9.3 in (880 × 550 × 235 mm)
Weight309 lbs (140 kg)
Mounting OptionsWall Attached / Floor Mount
Display / IndicatorsLED Status Indicators
Connector TypeDegson Quick Connector / Screw Terminal
Battery Performance & Lifecycle
Cycle Life (70% EOL Capacity)10,000 Cycles @ 0.5C, 25°C, 80% DOD
Design Life15 Years
Lifetime Energy Throughput122.2MWh
Warranty10 Years or 10,000 Cycles
Application TypeResidential, Commercial, Off-Grid, Backup
Recommended DOD Setting20% minimum to maintain recommended 80% Depth of Discharge
Certifications
UL 1973Pending
UL 9540Pending
UL 9540APending
UN 38.3Pending
Inverter AC Specifications
Nominal AC Voltage120/240VAC | 120/208VAC (L1/L2/N required)
Frequency60 Hz (Default) | 50 Hz
Max. AC Current50A @ 240V | 57.7A @ 208V
Max. AC Input Power12,000W
Max. AC Bypass90A
Operating Voltage Range180 – 270VAC
Output Voltage120/240VAC | 120/208VAC (L1/L2/N required)
Max. Output Current66.7A
Output Frequency60 Hz (Default) | 50 Hz
Power Factor0.99 (Full Load)
Reactive Power Adjustment Range-0.8 to 0.8 Leading Adjustable
Total Harmonic Distortion<5% (Full Load)
Transfer Time20ms (Default) | 10ms (Configurable) | 20ms (Parallel)
Inverter Output & Surge Specifications
Nominal Output Power12,000W @ 240V | 12,000W @ 208V
Nominal Output Power (with PV)16,000W @ 240V | 13,800W @ 208V
Peak Power24,000W (0.5 sec) | 18,000W (1 sec)
15,000W (6 min) | 13,200W (12 min)
Rated Output Current50A @ 240V | 57.7A @ 208V
Rated Output Power12,000W @ 240VAC | 12,000W @ 208VAC
THD Voltage<5%
Solar MPPT Specifications
Number of MPPTs3
Inputs per MPPT2 (MPPT 1) | 2 (MPPT 2) | 1 (MPPT 3)
Max. Usable Input Current26A (MPPT 1) | 26A (MPPT 2) | 15A (MPPT 3)
Max. Short Circuit Input Current31A (MPPT 1) | 31A (MPPT 2) | 19A (MPPT 3)
DC Input Voltage Range100 – 600VDC
Unit Start-Up Voltage100VDC
MPPT Operating Voltage Range120 – 440VDC
Nominal MPPT Voltage360VDC
Max. Utilized PV Array Power21,000W
Max. Recommended PV Input25,000W
Max. Efficiency97% (PV→Grid) | 94.5% (PV→Battery) | 94% (Battery→Grid)
Battery Interface Specifications
Nominal Battery Voltage48VDC
Battery Voltage Range40 – 60VDC
Max. Charge / Discharge Power12,000W
Recommended Battery Capacity>300Ah per Inverter
Idle Consumption<65W
Inverter Environmental Specifications
Operating / Storage Temperature-13°F – 140°F (-25°C – 60°C)
Operating Altitude<6,561 ft (<2,000 m)
Relative Humidity0 – 100%
Typical Noise Emission<50dB @ 3 ft
Design TopologyHigh-Frequency / Transformerless
Protection RatingIP65 / NEMA 4X
CommunicationsRS485 / CANBus / WiFi
Max. Parallel Connections16
Inverter Physical Specifications
Weight88 lbs (40 kg)
Depth11.3 in (287 mm)
Width22.3 in (567 mm)
Height30.5 in (775 mm)
Notes
Storage RecommendationIf stored longer than 3 months, recommended storage temperature is 59°F – 86°F (15°C – 30°C).
DisclaimerSpecifications are subject to change without notice.

Understanding Your Power Needs

Power Calculation Guide

Sizing Metric Formula & Example
Energy Consumption (Wh) Formula: Watts × Hours
Example: 60W × 4 hrs = 240 Wh
Battery Capacity (Ah) Formula: Watt-hours ÷ System Voltage (V)
Example: 240 Wh ÷ 12V = 20 Ah
Inverter Size (W) Formula: Total Watts × 1.25 (safety margin)
Example: 300W × 1.25 = 375W → Use 400W inverter
Total Load Power (W) Formula: Sum of all appliance watts used simultaneously
Example: Light (10W) + Fan (75W) = 85W
Runtime (hrs) of Battery Formula: (Battery Ah × Voltage) ÷ Total Load (W)
Example: (100Ah × 12V) ÷ 240W = 5 hrs

Find Your Power Match

Need / Application System Recommendation
Basic lighting + phone charging Recommended Battery: 50Ah – 100Ah (12V)
Inverter Size: 100W – 200W
Notes: For small backup setups
Home office (laptop, fan, TV) Recommended Battery: 150Ah – 200Ah (12V or 24V)
Inverter Size: 500W – 1000W
Notes: For moderate usage with 4–6 hours of backup
Home backup (fridge, lights) Recommended Battery: 200Ah+ (24V or 48V recommended)
Inverter Size: 1000W – 1500W
Notes: Ideal for longer backups or heavier loads
Business / shop power backup Recommended Battery: 300Ah+ (48V system)
Inverter Size: 2000W – 3000W
Notes: Suitable for commercial setups or extended power outages

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EG4 WallMount 314Ah All-Weather Battery + FLEXBOSS21

$7,518.97