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Fortress Power eFLEX 5.4 > 48 Volt 6.65kWh (105AH) Lithium Iron Battery
Fortress Power eFLEX 5.4 > 48 Volt 6.65kWh (105AH) Lithium Iron Battery

Our Price: $3,850.00
Warranty: 10 year product warranty & guarantee
up-to 6000 cycles, whichever comes first.


Description Datasheet

Fortress Power > 48 Volt 6.65kWh (105AH) Lithium Iron Battery

Model eFLEX 5.4
Series eFLEX
Manufacturer Fortress Power


Type Lithium Iron Phosphate (LiFePO4)
Dimensions (L x W x H) 21.5" x 17.5" x 7.2"
Weight 108 lbs
Shipping Method Freight
Nominal Voltage 48V
Rated Capacity (20 Hour Rate) 105 AH
Terminal Type M8

Detailed Information

Lithium Iron Phosphate Battery
The Fortress Power eFlex is a 5.4 kWh scalable energy storage solution based on safe and energy dense prismatic Lithium-Iron-Phosphate cells. The high amperage, smart Battery Management System (BMS) includes relay disconnects, closed-loop inverter communication, cell voltage and temperature monitoring, and cell balancing to maximize reliability and longevity, as well as wifi for internet-of-things compatibility. The unit can be wall mounted, floor mounted, and server rack mounted.


  • 98% Roundtrip efficiency
  • High Durability and Long-Lasting
  • Safe Lithium Iron Phosphate Technology (LiFeP04)
  • Flexible mounting options
  • Remote monitoring
  • Advanced cell level monitoring and balancing
  • Close-loop communication with many hybrid inverters
  • Canbus, Modbus, and wifi communication

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