Fortress Power eFlex Max 5.4KWH 105AH 48V Battery

Fortress Power eFlex Max 5.4KWH 105AH 48V Battery

Description:

FEATURES 

• Built with a saltwater-resistant aluminum enclosure, the eFlex MAX is engineered for both indoor and outdoor use — no additional protective housing required.
• Enjoy over 8,000 cycles and a 10+ year lifespan, thanks to the battery’s patented ¾" aluminum shell, which delivers superior thermal regulation and durability — even under high-power loads.
• The eFlex MAX operates at up to 99% round-trip efficiency and consumes just 2W in idle mode, making it ideal for off-grid systems and maximizing energy savings.
• Expand your system with ease. Built-in busbars allow multiple units to be connected in parallel, supporting higher current loads and reducing wiring complexity.
• With a waterproof front cover and flexible wall or floor mounting, the eFlex MAX ensures a clean, fast, and code-compliant installation — no external conduits needed.
• Delivering premium performance at an accessible price, the eFlex MAX offers best-in-class LFP technology, high output, and unbeatable long-term value.

• Nominal Voltage: 51.2 V
• Nominal Capacity: 105 Ah
• Nominal Energy: 5.37 kWh
• Operating Voltage Range: 48 – 56 V (recommended)
• Max Charge/Discharge Current: 100 A / 100 A (5.12 kW)
• Recommended Charge Current: ≤ 55 A
• Peak Discharge Current (5 s): 130 A (6.6 kW)
• Cycle Life (EOL 70%): 8,000 cycles @ 80% DOD
• Efficiency: > 98% (at 0.5 C)
• Parallel Expansion: Up to 16 units (≈ 86.4 kWh total)
• Operating Temperature: –4 °F to 131 °F (–20 °C to 55 °C)
• Dimensions (L×W×H): 446 × 184 × 616 mm | 17.5 × 7.2 × 24.2 in
• Weight: 112 lb (51 kg)
• Terminal Type: M8 (3/8 in ring or larger)
• Communication: RS485 / CAN / Modbus / Wi-Fi
• Fault Current: 3000 A (5 ms)
• Warranty: 10 Years

Fortress Power eFlex Max 5.4KWH 105AH 48V Battery Warranty Info

Fortress Power eFlex Max 5.4KWH 105AH 48V Battery Installation Manual