Fortress Power, eFlex Max 5.4 kWh LFP battery

Compact | Durable | Fully Integrated | 10-Year Warranty

The eFlex Max 5.4kWh Lithium Iron Phosphate (LFP) Battery is a rugged, ready-to-install energy storage solution engineered for performance and durability in demanding environments. With 105Ah capacity and 5.4kWh total energy, this battery is ideal for both residential and commercial applications — especially in coastal, off-grid, or outdoor settings.

Protected by an IP65-rated marine-grade aluminum enclosure, and equipped with essential mounting and connection components, the eFlex Max delivers dependable, space-saving storage that’s easy to scale.

Key Features:

• Total Energy: 5.4kWh
• Rated Capacity: 105Ah
• Battery Chemistry: Lithium Iron Phosphate (LFP) – high safety and long cycle life
• Outdoor-Ready: IP65-rated saltwater-proof aluminum enclosure for harsh environments
• Integrated Monitoring: Compatible with communication protocols (CAN/RS485)
  
  

10-Year Warranty: Manufacturer-backed performance and durability guarantee

What’s Included:

• 1x 5.4kWh LFP Battery (105Ah)
• IP65-Rated Saltwater-Proof Aluminum Enclosure
• Wall-Mount Bracket
• eFlex Max Top Cover
• Busbars for parallel connection
• Communication Cables for system integration
  
  

Specifications:

• Nominal Voltage: ~51.2V
• Capacity: 105Ah
• Energy: 5.4kWh
• Cycle Life: ≥6000 cycles @ 80% DOD
• Enclosure Rating: IP65 (dustproof, water-resistant, corrosion-resistant)
• Material: Powder-coated aluminum
• Dimensions (L x W x H): 21.5 x 17.5 x 7.2 inches
• Weight: 116 lbs
• Units per Pallet: 12
  
  

Ideal Applications:

• Home energy storage systems
• Off-grid power installations
• Marine or coastal environments
• Telecom and industrial backup
• Scalable solar storage arrays