Fortress Power eFlex MAX 5.4 kW

• The Fortress Power eFlex Max 5.4kW: Unmatched Durability and Efficiency for Your Energy Independence

The Fortress Power eFlex Max 5.4kW 48V battery is engineered to be the cornerstone of your residential, off-grid, or DIY solar power system. This isn't just another battery; it's a commitment to self-reliance, powered by best-in-class technology and built for the most demanding conditions.

The eFlex Max is designed with the eco-conscious consumer and the hands-on enthusiast in mind. Its robust, saltwater-resistant aluminum enclosure with an IP65 rating means it's ready for anything, from a clean garage wall to an outdoor installation in challenging climates. No need for additional protective housing or complex setups—this battery is built tough from the inside out.

**The eFlex MAX 5.4kWh and the eFlex 5.4kWh LFP Battery are NOT compatible with each other.

At the Heart of Reliability and Resilience

At the heart of the Fortress Power eFlex Max 5.4kW 48V is its industry-leading Lithium Iron Phosphate, known for its exceptional thermal stability and safety. The battery's patented design provides superior thermal regulation, ensuring peak performance and longevity. This advanced engineering, combined with Tier 1 Automotive Prismatic cells, delivers a staggering 8,000+ life cycles at a 80% DoD and a 10+ year lifespan, thanks to the battery's patented ¾" aluminum shell is a testament to its long-term durability and value. The Fortress Power eFlex Max 5.4kW provides an ultra-high efficiency of over 98% and a minimal standby power loss of just 2W, ensuring every kilowatt-hour you store is maximized for your use.

The Fortress Power eFlex Max 5.4kW has integrated busbars which allow you to effortlessly connect multiple units in parallel, building a scalable energy storage system up to an impressive 86.4 kWh. With Pre-Threaded Conduit Fittings, the Fortress Power eFlex Max 4.5kW 48V carries with it an ease of installation unmatched in the industry. This modular design simplifies wiring complexity, saves on installation costs, and allows for higher current loads, giving you the flexibility to meet your power needs.

With its premium technology, unmatched durability, and accessible cost per kWh, the Fortress Power eFlex Max 5.4kW offers an unbeatable long-term value, proving that energy independence and environmental responsibility can go hand in hand.

Code Compliant, Safe and Secure Power

Safety is paramount with any energy storage solution. The Fortress Power eFlex Max 5.4kW is equipped with a state-of-the-art Battery Management System (BMS) that includes multi-level safety protections; overcharge and deep discharge protection, cell voltage, and temperature monitoring. Beyond its internal safeguards, the Fortress Power eFlex Max 5.4kW proudly carries certifications to meet stringent industry safety standards, including UL9540, UL9540A for fire safety, and UL1973 for batteries for use in stationary and motive auxiliary power applications. Inclusive of a 10 Year Warranty, these certifications are a critical consideration for complying with local electrical and safety regulations.

Features

10 Year Warranty

IP65 Rated for Outdoor/Indoor Use

8,000+ Lifecycles @ 80% DoD

300 Amp Busbar

125A Lockable Breaker

UL9540 UL9540A and UL1973 Compliant

Threaded Conduit

Technical Downloads

Data Sheet

Installation Manual

10 Year Warranty

eFlex MAX OGPE Certification

eFlex MAX UL1973 ATM Certification

eFlex MAX UL9540 Certification

eFlex MAX UL9540A Verification of Compliance

eFlex MAX/ DuraRack UL9540A Verification of Compliance