Fortress Power eFlex Battery for Reliable Energy Storage

Compact | Reliable | Wall-Mountable | 10-Year Warranty

This 5.4kWh Lithium Iron Phosphate (LFP) Battery offers dependable, high-efficiency energy storage in a sleek, space-saving format. With a 105Ah capacity and an included A14 wall-mount bracket, it's engineered for easy vertical installation in residential, commercial, or off-grid energy systems.

Protected by a durable enclosure and backed by a maximum 10-year warranty, this battery is ideal for scalable solar storage or backup applications where footprint, safety, and reliability matter.

Key Features:

• Total Energy Capacity: 5.4kWh
• Rated Capacity: 105Ah
• Battery Chemistry: Lithium Iron Phosphate (LFP) – known for long cycle life and thermal stability
• Wall-Mount Ready: Includes A14 bracket for clean, secure vertical installation
• Max. Warranty: Up to 10 years (manufacturer-backed)
• Modular Design: Easily expandable for larger systems
  

Specifications:

• Nominal Voltage: ~51.2V
• Energy: 5.4kWh
• Capacity: 105Ah
• Cycle Life: ≥6000 cycles @ 80% DOD
• Mounting: Wall-mountable (A14 bracket included)
• Enclosure Rating: Typically IP65 (model dependent)
• Dimensions (L x W x H): 21.5 x 17.5 x 7.2 inches
• Weight: 116 lbs

What’s Included:

• 1x 5.4kWh LFP Battery (105Ah)
• 1x A14 Wall Mount Bracket
• Installation hardware & documentation (if provided)
  

Ideal Applications:

• Residential solar battery storage
• Off-grid or hybrid systems
• Compact utility storage
• Scalable battery arrays for commercial use

High-Capacity LFP Performance

The Fortress Power eFlex battery is designed to deliver dependable energy storage with a 5.4 kWh capacity and 105 Ah rating. Built with lithium iron phosphate (LFP) technology, it offers strong cycle life, stable output, and improved safety compared with many traditional battery options. This makes it a smart choice for homeowners and businesses that need reliable backup power or daily solar energy storage. Its efficient design supports consistent performance in a wide range of applications, helping users store more energy and use it when it matters most. For modern energy systems, it provides both durability and peace of mind.

Flexible Design for Solar and Backup Systems

One of the key advantages of the Fortress Power eFlex battery is its flexible installation and system compatibility. It works well in solar storage setups, backup power systems, and off-grid applications where reliable performance is essential. The compact form factor makes it easier to fit into spaces where larger batteries may not work, while still offering substantial storage capacity. This flexibility helps installers and end users create efficient energy systems tailored to their needs. Whether used for home resilience or commercial energy support, the eFlex battery provides a practical solution that balances power, space, and long-term value.

Safe, Efficient, and Built to Last

Safety and long-term reliability are major strengths of the Fortress Power eFlex battery. The LFP chemistry is known for excellent thermal stability and lower risk, which is important for energy storage in residential and commercial environments. In addition, this battery is engineered for high efficiency, helping reduce energy loss during charging and discharging. Its durable construction supports repeated use over time, making it a cost-effective investment for users who want lasting performance. When paired with solar panels or an inverter system, it can help maximize energy independence while maintaining dependable operation day after day. It is a strong option for efficient power management.

High-Capacity LFP Performance

The Fortress Power eFlex battery is designed to deliver dependable energy storage with a 5.4 kWh capacity and 105 Ah rating. Built with lithium iron phosphate (LFP) technology, it offers strong cycle life, stable output, and improved safety compared with many traditional battery options. This makes it a smart choice for homeowners and businesses that need reliable backup power or daily solar energy storage. Its efficient design supports consistent performance in a wide range of applications, helping users store more energy and use it when it matters most. For modern energy systems, it provides both durability and peace of mind.

Flexible Design for Solar and Backup Systems

One of the key advantages of the Fortress Power eFlex battery is its flexible installation and system compatibility. It works well in solar storage setups, backup power systems, and off-grid applications where reliable performance is essential. The compact form factor makes it easier to fit into spaces where larger batteries may not work, while still offering substantial storage capacity. This flexibility helps installers and end users create efficient energy systems tailored to their needs. Whether used for home resilience or commercial energy support, the eFlex battery provides a practical solution that balances power, space, and long-term value.

Safe, Efficient, and Built to Last

Safety and long-term reliability are major strengths of the Fortress Power eFlex battery. The LFP chemistry is known for excellent thermal stability and lower risk, which is important for energy storage in residential and commercial environments. In addition, this battery is engineered for high efficiency, helping reduce energy loss during charging and discharging. Its durable construction supports repeated use over time, making it a cost-effective investment for users who want lasting performance. When paired with solar panels or an inverter system, it can help maximize energy independence while maintaining dependable operation day after day. It is a strong option for efficient power management.