Fortress Power | FlexTower-Enclosure IP 65 Outdoor Rated
Fortress Power | FlexTower-Enclosure IP 65 Outdoor Rated - FlexTower (Inverter Enclosure) 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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Price Match Guarantee
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The FlexTower is a fully integrated energy storage solution designed for simplicity and performance. Based on the proven DuraRack battery enclosure, FlexTower brings together the battery system, inverter, and charge controller in a single enclosure. It features an onboard LCD interface along with remote monitoring support. Designed for straightforward installation, the system is rated IP65 and NEMA 3R, making it suitable for both indoor and outdoor environments.
Key Capabilities
Complete Integrated System
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Battery, inverter, charge controller, display interface, and monitoring software housed in one unit
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Supports multiple operating modes including off-grid operation, backup power, zero-export control, time-based energy use, demand response, peak reduction, and virtual power plant participation
Flexible Installation Options
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Weather- and dust-resistant enclosure rated IP65 / NEMA 3R for indoor or outdoor placement
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Compatible with AC- or DC-coupled configurations for new or existing solar systems
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Optional rapid shutdown switch available
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Side entry knockouts accommodate solar, utility, and generator connections
Designed for Long-Term Reliability and Protection
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Uses automotive-grade Tier 1 lithium iron phosphate (LFP) cells with over 8,000 charge cycles
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Modular design allows expansion to support large residential or commercial power demands
Whole-Home Backup Capability with 200A Pass-Through
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Integrated 200A grid pass-through removes the need for a separate backup subpanel
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Simplifies inverter wiring and reduces installation time
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Includes battery cabling and a combiner for added cost savings
High Efficiency for Maximum Energy Return
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Battery round-trip efficiency exceeding 98%
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High CEC-rated inverter efficiency
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Compatible with DIN-rail heaters to support optimal performance in colder climates






