Fortress Power eFlex MAX 5.4kWh 

Discover the power and flexibility of the eFlex MAX 5.4 LFP Battery, designed to provide you uninterrupted power in the most demanding environments and weather conditions. This top-tier lithium battery combines advanced technology with practical design to meet a wide range of energy needs while ensuring utmost safety and reliability.

8000 cycles guaranteed, 10-year warranty and the highest quality standard, make it perfect for both your home, apartment and condos, off grid cabins, RVs, boats and more.

Robust Design with Salt Water-resistant Aluminum Enclosure – designed for both indoor and outdoor use without extra protective structures.

Longest Battery Life Span (8000+ cycles; 10+ year) – The patented 3/4″ aluminum enclosure design regulates the battery’s internal temperature high-power applications, resulting in 3 times greater thermal performance than competitors and extended life span.

99% Efficiency with 2W Idle Power – Enhanced Performance in Off-Grid Systems with 2W consumption, minimizing power loss in standby mode and resulting in cost savings.

Easy to Scale-up Battery Capacity to Match Your Energy Need – included Busbars enable faster installation of multiple units in parallel with fewer errors, handle higher power current than battery cables.

Clean, Streamlined and flexible Installation The waterproof front battery cover eliminates the extra wire management (such as conduits). Both Wall mount and floor mount are available.

Best Bang for Your Buck – Obtain lowest energy cost with best battery technology and product quality, highest performance and affordable price point.

eFlex MAX Datasheet

eFlex MAX Owner / Installation Manual

eFlex MAX Warranty Letter