Fortress Power 5.4 kWh eFLEX eFLEX 5.4 G2 48V LFP battery
Fortress Power 5.4 kWh eFLEX eFLEX 5.4 G2 48V LFP battery
Fortress Power 5.4 kWh eFLEX eFLEX 5.4 G2 48V LFP battery
Fortress Power 5.4 kWh eFLEX eFLEX 5.4 G2 48V LFP battery
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Fortress Power 5.4 kWh eFLEX eFLEX 5.4 G2 48V LFP battery
eFlex 5.4 G2
Fortress Power 5.4 kWh eFLEX 5.4 G2 48V LFP Battery
Key Benefits
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Expandable Energy Storage: Stack up to 30 units in parallel for 162kWh total capacity.
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Long Cycle Life: Over 8,000 cycles at 80% DoD for long-term durability.
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Weatherproof Design: IP65-rated aluminum enclosure ideal for indoor/outdoor installations.
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Flexible Mounting: Floor, wall, or server rack compatible with simple install hardware.
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High Compatibility: Integrates seamlessly with major inverter brands like Victron, Sol-Ark, and Schneider.
Special Technology
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Tier 1 Prismatic LiFePO₄ Cells: Superior safety, thermal performance, and lifespan.
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Smart BMS: Digital processor with high-amp contactor disconnects, cell-level monitoring, and balancing.
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Multiple Communication Protocols: Supports CANbus, Modbus, and Wi-Fi for IoT integration and closed-loop inverter control.
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Thermal Optimization: Patented design provides 4x better heat dissipation vs. standard lithium batteries.
Best Use
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Off-grid solar power systems
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Whole-home backup solutions
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Time-of-Use and demand response applications
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Peak shaving and zero-export setups
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Outdoor or harsh-weather installations
Warranty
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10-Year Limited Warranty – Ensures peace of mind with industry-leading cycle life and support.
Specifications
| Category | Details |
|---|---|
| Nominal Voltage | 51.2 V |
| Nominal Capacity | 105 Ah |
| Energy Capacity | 5.374 kWh |
| Max Modules in Parallel | 30 (162 kWh total) |
| Depth of Discharge (DoD) | 100% |
| Cycle Life | 8,000 cycles @ 80% DoD |
| Efficiency | >98% |
| Max Discharge (1 min) | 100A (5kW) |
| Max Surge (5 sec) | 130A (6.6kW) |
| Recommended Charge Current | ≤ 55A |
| Max Charge Current | 100A |
| Charge Voltage | 54.4V (Recommended), 54.6V (Peak) |
| Operating Temp (Discharge) | -4°F to 131°F (-20°C to 55°C) |
| Operating Temp (Charge) | 32°F to 114°F (0°C to 45°C) |
| Storage Temperature | 20°F to 95°F (-6°C to 35°C) |
| Dimensions (inches) | 18 x 23 x 7.3 in (L x W x H) |
| Weight | 108 lbs |
| Enclosure Rating | IP65 (Dust & Water Resistant) |
| Battery Chemistry | LiFePO₄ (Tier 1 Automotive Prismatic Cells) |
| Certifications | UL9540, UL9540A, UL1973, UL1642, CEC, SGIP |
| Communication Ports | CANbus, Modbus, Wi-Fi |
About Fortress Power:
Fortress Power designs durable, smart lithium energy storage solutions for residential and commercial applications. Known for high performance, safety, and compatibility, their batteries are built to last in any environment.
Why Buy From US Solar Supplier?
As an American founded company out of Kentucky, US Solar Supplier is committed to providing top-quality solar products, backed by the world’s leading manufacturers. Our promise is to get you the fairest price from the best brands that offer warranties you can count on. We are updating our inventory daily with solar components that offer the latest technology. With a reputation for excellence and a dedication to customer satisfaction, we ensure that every product we sell meets the highest standards in the industry.
Need Assistance?
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Why Buy From Us?
Trusted Supplier: We work with Tier 1 manufacturers who stand behind their products.
Expert Support: Our team is here to guide you every step of the way.
Manufacturer-Backed Warranties: Enjoy peace of mind with the 10-year product warranty directly from the manufacturer.
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