Fortress Power eFlex 5.4 – LFP Battery
The Fortress Power eFlex 5.4 kWh is a scalable energy storage battery solution with high efficiency, high durability, and using the safest battery technology! This Lithium Iron Phosphate battery features user-friendly integrations including remote monitoring, cell-level monitoring, and close-loop communications with many hybrid inverters.
Wall bracket included
Fortress Power eFlex – 5.4 kwh Lithium Iron Phosphate Battery
Fortress Power announces the eFlex 5.4 kWh scalable energy storage battery solution!
This unit uses safe and high energy density prismatic Lithium Iron Phosphate cells.
The eFlex 5.4 kwh battery has a built-in data storage and Wi-Fi for remote monitoring and troubleshooting ability. The smart relay-based Battery Management System (BMS) supports closed-loop communication with various 48V hybrid inverters on the market. Additionally, the BMS monitors and balances the voltage and temperature of each individual cell to maximize reliability and longevity.
The Fortress Power eFlex has the highest round trip efficiency in the industry at 98%! Additional features include wall mounting hardware, and it fits well into standard server racks for large systems.
|Fortress Power eFlex 5.4|
|Total Energy||5.4 kWh|
|Max Charge Current (continuous)||55 A|
|Max Discharge Current (continuous)||68 A|
|Max Pulse Current (for 5 sec)||130 A|
|Voltage Range||44 – 58.4 V|
|Charging Temperature||32 – 113ºF|
|Discharging Temperature||32 – 140ºF|
|Storage Temperature||32 – 95ºF|
|Dimensions (HxWxD)||18″ x 23″ x 7.3″|
|Life Cycles||6,000 @ 80% DoD|
|Round Trip Efficiency||>98%|
Why The Fortress Power eFlex Is Dominating the Market
High Durability & Long Lasting
10 Year Warranty with the safe and premium prismatic Lithium-Iron-Phosphate cells.
Lowest Cost Per Cycle
High energy throughput with exceptional life span (6000+ cycles) and high round-trip efficiency (>98%). Thanks to the exceptional life span of an LFP battery, you will connect to the lowest energy costs available!
The new eFlex battery is scalable up to 200 kWh per inverter via CAN communication cables, to support Residential, Commercial and Industrial Storage Projects.
The compact and easy-to-install unit can be wall mounted or floor-standing.The eFlex also comes with racks that can be used to stack multiple units on the floor. It is brilliantly designed to fit into standard 24-inch computer racks!
The battery has a built-in data storage Wi-Fi for remote monitoring and troubleshooting ability
More Outstanding Features
Waterproof and Saltwater Resistant Aluminum Enclosure
The eFlex 5.4 comes with a light-weight Aluminum case, which is a popular choice for preventing salt-water corrosion, among various metal enclosures. Also, the slim-looking cabinet has an IP 65 waterproof rating. However, we still recommend that you place the unit in an indoor environment to obtain the 6000+ charge cycles.
Safe and reliable Prismatic Lithium Iron Phosphate (LFP; LiFePO4) cells
Sturdy relay-based Battery Management System (BMS) circuit board for fast charging/discharging.
Closed-loop communication with inverters/chargers
Fortress Power Compatibility
Fortress Lithium Iron Phosphate batteries are designed to work with most 48VDC inverter and chargers available on the market. Below is a list of compatible inverters and chargers.
|Sol-Ark||8 KW & 12 KW Inverter||AC or DC coupled|
|Schneider||Conext XW MPPT charge controller; Conext XW+/XW pro series||AC or DC coupled|
|Outback||Skybox, FLEX max charge controller (48V), FLEXpower series (48V); Radian series (48V); FXR(A) and FXR (E) series (48V); GVFX and GVFX series (48V);||AC or DC coupled|
|Magnum||MS 4448PAE; MS 4048-20B||AC or DC coupled|
|SMA||SUNNY ISLAND 4548-US/6048-US; SUNNY ISLAND 3.0M/4.4M/6.0H/8.0H||AC coupled|
|Victron||Phoenix VE.Direct Inverter; MultiPlus and Quatro Inverter/Charger; Skylla-TG Charger; General; Color Control or Venus GX||DC coupled|
|Morning Star||TriStar MPPT 600V; TriStar MPPT; Tristar PWM||DC coupled|
|Midnite Solar||Solar Classic 150, 200 & 250; Solar Classic 150, 200 & 250-SL||DC coupled|
If you can’t find the inverter you are using on the list, please call us at (864) 915-1855or email us at [email protected]
Data Sheets & Literature
- eFlex Technical Datasheet
- View Our Battery Chemistry Comparison
- eFlex Brochure
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