Fortress Power | DuraRack + eFlex
Fortress Power | DuraRack + eFlex - 3 eFlex Batteries is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
We offer fast and reliable shipping across the continental U.S., with free shipping available on most orders (exclusions may apply based on brand and product type). Orders are typically processed within 1–2 business days and transit time is usually 4–7 business days. Larger items may ship via freight and require a scheduled curbside delivery. Please ensure your contact details are accurate at checkout. For questions about delivery timelines, shipping eligibility, or special requests, feel free to contact us directly. See Policy.
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Do You Offer Financing?
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Price Match Guarantee
Price Match Guarantee
We’re committed to offering the best online prices—if you find a lower price from an authorized retailer, we’ll beat it. Our 100% Price Beat Guarantee excludes promotions, auction sites, and exchanges, and factors in item price, tax, and shipping. For price match inquiries, contact us at (833) 932-9683
Fortress Power | DuraRack + eFlex
Increase system capacity with the Fortress Power DuraRack battery enclosure. This heavy-duty metal cabinet is designed to hold up to four eFlex 5.4 kWh battery modules per unit and can be expanded by linking up to four enclosures, supporting a total of 15 eFlex batteries and 81 kWh of storage. The DuraRack comes equipped with built-in busbars and a dedicated mounting location for a DIN-rail heater. It supports freestanding or pad-mounted installation and is approved for use in both indoor and outdoor environments.
Key Benefits
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IP65-rated enclosure provides protection against dust and water for indoor or outdoor placement
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Integrated busbars and included battery cables enable straightforward stacking and expansion
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Simple DIN-rail thermostat or heater integration for reliable operation in cold climates
-
Passive ventilation design supports heat dissipation in warmer environments
-
Scalable design allows connection of up to four racks (15 eFlex batteries, 81 kWh total capacity)
Fortress Power | DuraRack + eFlex
Increase system capacity with the Fortress Power DuraRack battery enclosure. This heavy-duty metal cabinet is designed to hold up to four eFlex 5.4 kWh battery modules per unit and can be expanded by linking up to four enclosures, supporting a total of 15 eFlex batteries and 81 kWh of storage. The DuraRack comes equipped with built-in busbars and a dedicated mounting location for a DIN-rail heater. It supports freestanding or pad-mounted installation and is approved for use in both indoor and outdoor environments.
Key Benefits
-
IP65-rated enclosure provides protection against dust and water for indoor or outdoor placement
-
Integrated busbars and included battery cables enable straightforward stacking and expansion
-
Simple DIN-rail thermostat or heater integration for reliable operation in cold climates
-
Passive ventilation design supports heat dissipation in warmer environments
-
Scalable design allows connection of up to four racks (15 eFlex batteries, 81 kWh total capacity)
Amount of eFlex Batteries