Fortress Power | FlexTower + 12k Inverter + eFlex Batteries
Fortress Power | FlexTower + 12k Inverter + eFlex Batteries - 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 | FlexTower + 12k Inverter + eFlex Batteries
The FlexTower is a self-contained energy storage platform designed to simplify installation and operation. Developed using the DuraRack battery enclosure as its base, FlexTower integrates the battery system, inverter, and charge management hardware into one consolidated cabinet. An onboard LCD interface and remote monitoring tools provide system visibility and control. With IP65 and NEMA 3R environmental ratings, the system is suitable for both indoor and outdoor deployment.
Core Features
Integrated Energy Storage Platform
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Combines the battery system, inverter, charge controller, display interface, and monitoring software within a single enclosure
-
Operates across multiple energy use cases including off-grid power, backup energy, export limitation, time-based optimization, demand response, peak load reduction, and virtual power plant participation
Simplified and Adaptable Installation
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Sealed enclosure offering IP65 / NEMA 3R protection for indoor or outdoor locations
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Supports both AC- and DC-coupled connections with new or existing solar installations
-
Optional rapid shutdown switch available
-
Side-mounted conduit openings accommodate solar, utility, and generator wiring
Built for Reliability and Long-Term Performance
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Equipped with automotive-grade Tier 1 lithium iron phosphate (LFP) battery cells rated for over 8,000 cycles
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Modular architecture allows the system to scale for large residential or commercial energy requirements
Whole-Building Backup with 200A Pass-Through
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Integrated 200A grid pass-through removes the need for a separate backup subpanel
-
Reduces installation time and simplifies inverter wiring
-
Battery cables and combiner hardware included
High Efficiency for Optimized Solar Utilization
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Greater than 98% battery round-trip efficiency
-
High CEC-rated inverter efficiency
-
Compatible with DIN-rail heaters to help extend battery life in cold-weather environments
Fortress Power | FlexTower + 12k Inverter + eFlex Batteries
The FlexTower is a self-contained energy storage platform designed to simplify installation and operation. Developed using the DuraRack battery enclosure as its base, FlexTower integrates the battery system, inverter, and charge management hardware into one consolidated cabinet. An onboard LCD interface and remote monitoring tools provide system visibility and control. With IP65 and NEMA 3R environmental ratings, the system is suitable for both indoor and outdoor deployment.
Core Features
Integrated Energy Storage Platform
-
Combines the battery system, inverter, charge controller, display interface, and monitoring software within a single enclosure
-
Operates across multiple energy use cases including off-grid power, backup energy, export limitation, time-based optimization, demand response, peak load reduction, and virtual power plant participation
Simplified and Adaptable Installation
-
Sealed enclosure offering IP65 / NEMA 3R protection for indoor or outdoor locations
-
Supports both AC- and DC-coupled connections with new or existing solar installations
-
Optional rapid shutdown switch available
-
Side-mounted conduit openings accommodate solar, utility, and generator wiring
Built for Reliability and Long-Term Performance
-
Equipped with automotive-grade Tier 1 lithium iron phosphate (LFP) battery cells rated for over 8,000 cycles
-
Modular architecture allows the system to scale for large residential or commercial energy requirements
Whole-Building Backup with 200A Pass-Through
-
Integrated 200A grid pass-through removes the need for a separate backup subpanel
-
Reduces installation time and simplifies inverter wiring
-
Battery cables and combiner hardware included
High Efficiency for Optimized Solar Utilization
-
Greater than 98% battery round-trip efficiency
-
High CEC-rated inverter efficiency
-
Compatible with DIN-rail heaters to help extend battery life in cold-weather environments
Amount of eFlex Batteries