Modern Outpost
https://www.modernoutpost.com/product/eflex-5-4kwh-lfp-battery-by-fortress-power/
Export date: Sun Oct 18 8:12:58 2026 / +0000 GMT

eFlex 5.4kWh LFP Battery by Fortress Power

Price: CAD $3,429.00

SKU: FPEFLEX-54

Product Categories: , , , ,

Product Tags: , , , , , , , , , , , , , ,

Product Page: https://www.modernoutpost.com/product/eflex-5-4kwh-lfp-battery-by-fortress-power/

 

Product Summary

The Fortress Power eFlex is a 5.4 kWh scalable energy storage solution based on safe and energy dense prismatic Lithium Iron Phosphate (LiFePO4) cells. A very popular battery solution for cabins, homes, tiny homes, RVs, and Vans. All the features you'd expect from a leading brand including: Advanced digital Battery Management System (BMS) including a high amperage disconnect, advanced Closed-Loop inverter communication, individual cell voltage monitoring, temperature monitoring, and cell balancing. It all adds up to maximum reliability and longevity.

Product Description

The Fortress Power eFlex is a 5.4 kWh scalable energy storage solution based on safe and energy dense prismatic Lithium Iron Phosphate (LiFePO4) cells. A very popular battery solution for cabins, homes, tiny homes, RVs, and Vans. All the features you'd expect from a leading brand including: Advanced digital Battery Management System (BMS) including a high amperage disconnect, advanced Closed-Loop inverter communication, individual cell voltage monitoring, temperature monitoring, and cell balancing. It all adds up to maximum reliability and longevity.

Canbus, modbus, and wifi communication enable internet-of-things compatibility. The IP65 case ensures direct water spray and dust will not penetrate the battery internals from all directions. The unit can be wall mounted, floor mounted, and server rack mounted for hard-to-reach access in renewable, marine, RV, mobile, telecom, railway applications and more.

eFlex Battery Key Features

  • Rugged, Long-lasting, Daily Use Battery
  • Safe Lithium Iron Phosphate Technology (LifeP04)
  • 98% Round Trip Efficiency
  • Flexible Mounting Options
  • Remote Monitoring including wifi, modbus, and canbus
  • BMS Monitors & Balances Individual Cells
  • NRTL certified to UL9540 and UL9540a standards

.

eFlex 5.4 Specifications In Brief

Model : eFlex 5.4
Total Energy(kWh) : 5.4
Max. Charge Current (Continuous) [A] : 100
Max. Discharge Current (Continuous) [A] : 60
Max. Pulse Current (for 5 sec) [A] : 130
Capacity [Ah] : 105
Voltage Range [V] : 48-55
Charging Temperature : 0 to 45C (32 to 113F)
Discharging Temperature : 0 to 60C (32 to 140F)
Storage Temperature : 0 to 35 (32 to 95F)
Dimension [L x W x H] : 54.6 x 44.5 x 18.3cm (21.5 x 17.5 x 7.2 inches)
Weight : 52.7kg / 116 lb
Life Cycles : 8,000 @ 80% DoD
Round Trip Efficiency : >98%

Datasheets

eFlex Data Sheet 1
eFlex SPANISH Data Sheet 2
eFlex SPANISH Brochure 3

Installation Guides / Warranty

eFlex Owner / Installation Manual 4
Inverter Guides 5
Firmware  6
Warranty 7

Certifications

UL9540 / UL1973 Certificate 8
UL9540a Large Scale Fire Test Report 9

Racking Details

DuraRack Manual 10
Flexrack Technical Notes 11
Customer Server Rack Guide 12

Product Attributes

  • Dimensions: 25 × 20 × 12 cm
  • Weight: 53 kg

 
Links:
  1. https://www.fortresspower.com/wp-content/uploads/2 022/05/eFlex-Technical-Datasheet.pdf
  2. https://www.fortresspower.com/wp-content/uploads/2 021/11/eFlex-Technical-Datasheet_newlogo_Spanis.pd f
  3. https://www.fortresspower.com/wp-content/uploads/2 021/11/eflex-brochure-espanol.pdf
  4. https://www.fortresspower.com/wp-content/uploads/2 023/01/Fortress-Power-eFlex-Installation-Manual.pd f
  5. https://www.fortresspower.com/inverter-guides/
  6. https://www.fortresspower.com/firmware/
  7. https://www.fortresspower.com/wp-content/uploads/2 021/07/10-Year-eFlex-Warranty-Letter-12.2020-1-1.p df
  8. https://www.fortresspower.com/wp-content/uploads/2 021/08/Fortress-eFlex-UL9540-UL-1973-Certificate.p df
  9. https://www.fortresspower.com/wp-content/uploads/2 022/09/eFlex-UL9540a-Final-Report_-1.pdf
  10. https://learn.fortresspower.com/external/manual/du rarack/article/about-fortress?p=dc8b9a9c1b3f410556 835193e66f2257e172ecf63542188864f8ccc284d2a48d
  11. http://chrome-extension//oemmndcbldboiebfnladdacbd fmadadm/https://www.fortresspower.com/wp-content/u ploads/2021/09/FlexRack-Technical-Notes-Rev2.pdf
  12. https://www.fortresspower.com/wp-content/uploads/2 021/12/eFlex-Racking-Selection_Rev4.pdf
Product added date: 2023-11-03 21:31:36
Product modified date: 2026-02-05 09:55:52
Print this Product

Export date: Sun Oct 18 8:12:58 2026 / +0000 GMT
Product data have been exported from Modern Outpost [ https://www.modernoutpost.com ]
Product Print by WooCommerce PDF & Print plugin.