Fortress Power, DuraRack, Outdoor rated enclosure, holds 4 eFlex units per rack. Includes busbars and 4 sets

Designed for durability and performance, this outdoor-rated battery enclosure securely houses up to 4 eFlex or eFlex Max battery units per rack. Ideal for residential or commercial energy storage setups, it ensures reliable operation in a variety of environmental conditions.

Built to Perform Outdoors

• Material: Durable carbon steel with corrosion-resistant white finish
• Protection Rating:IP65 – fully sealed against water and dust intrusion
• Certifications: UL9540, UL9540A, UL1973, CEC, SGIP compliant
• Warranty: Backed by a 3-year enclosure warranty
  

Specifications

• Dimensions: 29.29" W × 41.34" H × 18.03" D (744 × 1050 × 458 mm)
• Weight: 153.2 lbs (59.6 kg)
• Maximum Battery Capacity: 4 x eFlex 5.4 units (up to 81 kWh total)
• Storage Range: 5.4 kWh to 21.6 kWh per unit
• Knockouts: 1" & 2" conduit knockouts for flexible cable routing
• Mounting: Suitable for secure floor or platform installation
  
  

Integrated Electrical Components

• Busbars:
• Battery Side: 2 x 4-point busbars with M8 (5/16") terminal rings
• Inverter Side: 2-point connections with M10 (3/8") terminal rings
• Battery Cables: Includes 4 complete sets of positive and negative battery cables
• Torque Specs: Terminal connections rated for 7.0 – 7.7 Nm (5.1 – 5.7 ft-lb)
  
  

Ideal for:
Off-grid solar systems
Residential and commercial energy storage
Clean and safe battery organization in outdoor environments
Ready to meet the demands of your energy storage system, the DuraRack enclosure combines robust protection, professional-grade build quality, and plug-and-play simplicity.