Fortress Power eFlex 5.4kWh Lithium Iron Phosphate Battery


Here is the Fortress Power eFlex 5.4 kWh battery storage solution (and it's scalable!!). Built with safe, high energy density, prismatic Lithium-Iron-Phosphate cells, this battery produces power that you can depend on.  It  also features built-in data storage and Wi-Fi for remote monitoring and troubleshooting abilities. The smart,  relay-based Battery Management System (BMS) supports closed-loop communication with numerous 48V hybrid inverters. Additionally, the BMS monitors and balances the voltage and temperature of each individual cell to maximize reliability and longevity.  The Fortress Power eFlex 5.4kWh Lithium Iron Phosphate Battery has wall mounting functionality and fits well into standard server racks for larger systems.

  • 99% Round trip Efficiency
  • Waterproof and Salt Water Resistant
  • Online Monitoring
  • Cell Level Monitoring and Balancing
  • Communicates with many Hybrid Inverters
  • Lithium Iron Phosphate (LiFePO4) Chemistry
  • 10 Year Warranty
  • Nominal Voltage:  51.2V
  • Voltage Range: 44V - 58.4V
  • Rated Capacity @0.5C: 105Ah / 5374Wh
  • Recommended Charging Voltage: 54.4V
  • Recommended Charging Current: <55A
  • Maximum Charging Current:  100A
  • Recommended Low Voltage cut off: 48V
    • BMS shut down is around 41V
    • Recovery Voltage is 45V
  • Cycle Life: 
    • 6000+ cycles @ 80% DoD
  • Discharge Rates:
    • <68A Continuous (recommended)
    • 100A for 60 minutes
    • 130A for 5 seconds (spike)
  • Charging Temperature Range: 32°F - 113°F  (0°C ~ 45°C)
  • Discharge Temperature Range: 32°F - 131°F  (0°C ~ 55°C)
  • Cell Type:  Prismatic
  • Cell Chemistry:  LiFePO4
  • Dimensions: 21.5" L x 17.5" W x 7.2" H  (546mm x 446mm x 183mm)
  • Weight: 108 lbs  (49kg)
  • Parallel Connection:  Yes, up to 15 modules
  • Series Connection: No
  • Warranty: 10 years
  • Certifications:  UL1973, UL1642 (cells)
  • Shipping Classification:  UN 38.3 Class 9 (Lithium Ion Battery)