Original price
$1,485.00
-Original price
$1,485.00
Original price
$1,485.00
$1,485.00-$1,485.00
Current price
$1,485.00
| /
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16.2–151.2kWh · All-In-One
Fortress Power FlexTower: All-in-One Battery, Inverter, and Controls
The FlexTower packs a Tier 1 LiFePO4 battery, hybrid inverter, charge controller, and LCD control panel into one pre-wired, outdoor-rated enclosure — built on the same cabinet as the Fortress Power DuraRack.
With 200A grid pass-through and a scalable 16.2kWh to 151.2kWh capacity range, it covers everything from a focused backup circuit to a much larger residential or light commercial system.
3-Year Warranty
Lowest Price Guarantee
Authorized Fortress Power Dealer
Free Shipping
0% APR Financing
Expert Support: (303) 876-7654
Why the FlexTower
Battery, Inverter, and Controls in One Enclosure
The FlexTower is pre-wired with the battery, inverter, charge controller, and LCD control panel already integrated — not just an empty cabinet you fill yourself.
200A Grid Pass-Through
Built-in 200A pass-through eliminates the need for a separate backup panel and saves significant inverter wiring time on installation.
Scales From 16.2kWh to 151.2kWh
One enclosure scales across a wide capacity range, so a single FlexTower can cover a small backup need or anchor a much larger system.
8,000+ Cycle Tier-1 LFP Battery
Built on automotive-grade Tier 1 prismatic LiFePO4 cells rated for 8,000+ cycles.
Outdoor-Rated Enclosure
Rated for indoor or outdoor installation, with side knockouts sized for solar, grid, and generator wiring and an optional rapid shutdown button.
Remote Monitoring App
Monitor performance and manage settings remotely through Fortress Power's monitoring app, without a truck roll for routine checks.
What's Included
What You Get
1 × Fortress Power FlexTower all-in-one enclosure (battery, inverter, charge controller, and LCD panel pre-integrated)
Battery cables and combiner
Documentation
Solar array and any additional expansion batteries sold separately.
Fortress Power's own materials list this two ways — IP65/NEMA 3R on the datasheet PDF, IP54 on the current product page. We'd rather flag the discrepancy than assert either figure — call us to confirm the exact rating for your installation.
Dimensions
29.2"W × 83.78"H × 17.8"D
Weight
265 lb
Certifications
UL1741, UL1973, UL9540, UL9540A
Warranty
3 years
Authorized Fortress Power Dealer
We sell genuine Fortress Power products backed by Fortress Power's own warranty.
Lowest Price Guarantee
Find it cheaper from another authorized dealer? Call (303) 876-7654 before you order.
Real Support, Not a Ticket Queue
Sizing a system or checking inverter compatibility? Call (303) 876-7654 and talk to a person.
Fortress Power FlexTower: All-in-One Battery, Inverter, and Controls: Frequently Asked Questions
Does the FlexTower come with a battery and inverter, or do I need to buy those separately?
It's fully pre-wired with the battery, inverter, charge controller, and LCD control panel all integrated into one enclosure — this is a complete system, not an empty cabinet.
What capacity can I get from one FlexTower?
Fortress Power rates the FlexTower across a 16.2kWh to 151.2kWh scalable range, so it can be sized from a modest backup system up to a much larger installation.
What is the actual ingress protection rating — IP65 or IP54?
Fortress Power's own materials list this two different ways: the datasheet PDF says IP65/NEMA 3R, the current product page says IP54. We don't want to publish a number we can't stand behind — call (303) 876-7654 and we'll get written confirmation of the rating for your specific installation before you order.
Does this eliminate the need for a backup panel?
The built-in 200A grid pass-through is designed to eliminate a separate backup panel requirement in most residential setups, which also saves on inverter wiring time during installation.
Can I install this myself, or do I need an electrician?
Fortress Power's equipment is designed for professional installation. We strongly recommend a licensed electrician or solar installer for any battery, inverter, or enclosure installation — call (303) 876-7654 if you need a referral in your area.
Do you offer financing or price matching?
Yes. We offer 0% APR financing options through Affirm at checkout, and our Lowest Price Guarantee applies — if you find this product cheaper at another authorized Fortress Power dealer, call us at (303) 876-7654 before you order and we'll take care of it.
