eFlex MAX 5.4kWh

eFlex MAX 5.4kWh | Smarter, Stronger, More Connected Energy Storage

A compact 48V LFP battery with closed-loop inverter integration, advanced communications, and installer-friendly design — ideal for scalable residential systems.

Product Overview

Product Features

Product Information

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Product Compatibility

eFlex MAX 5.4kWh

Lithium Battery Storage

The eFlex MAX 5.4 kWh is a high-performance 48V lithium iron phosphate (LFP) battery engineered for maximum flexibility, reliability, and long-term energy savings. Designed to operate in demanding environments — from homes and apartments to off-grid cabins, RVs, and boats — it delivers uninterrupted backup power with smart inverter integration and advanced system communications.

With a guaranteed 8,000+ cycle life, a 10-year warranty, and built-in safety protections, the eFlex MAX meets the highest standards for quality and performance. Whether used for solar self-consumption, backup power, or off-grid storage, it’s a versatile solution built to last.

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

Applications

Residential

Apartments and Condos

Off-Grid

Marine

FEATURES

Durable, Outdoor-Ready Design

Built with a saltwater-resistant aluminum enclosure, the eFlex MAX is engineered for both indoor and outdoor use — no additional protective housing required.
Industry-Leading Battery Lifespan

Enjoy over 8,000 cycles and a 10+ year lifespan, thanks to the battery’s patented ¾" aluminum shell, which delivers superior thermal regulation and durability — even under high-power loads.
Ultra-High Efficiency with Minimal Standby Loss

The eFlex MAX operates at up to 99% round-trip efficiency and consumes just 2W in idle mode, making it ideal for off-grid systems and maximizing energy savings.

Effortless Scalability with Integrated Busbars

Expand your system with ease. Built-in busbars allow multiple units to be connected in parallel, supporting higher current loads and reducing wiring complexity.
Streamlined Installation, Indoors or Out

With a waterproof front cover and flexible wall or floor mounting, the eFlex MAX ensures a clean, fast, and code-compliant installation — no external conduits needed.
Maximum Value, Minimum Cost per kWh

Delivering premium performance at an accessible price, the eFlex MAX offers best-in-class LFP technology, high output, and unbeatable long-term value.

PRODUCT INFORMATION

Specifications
Downloads
Bill of Materials

General
Name	eFlex MAX 5.4
Total Energy(kWh)	5.4
Max. Charge Current (Continuous) [A]	100
Max. Discharge Current (Continuous) [A]	100
Nominal Capacity [Ah]	105
Voltage Range [V]	48-55
Charging Temperature [F]	32 ~ 114
Discharging Temperature [F]	-4 ~ 131
Storage Temperature [F]	20 ~ 95
Dimension [L x W x H, inch]	17.5 x 24.2 x 7.2
Weight [lbs]	108
Life Cycles	8000 @ 80% DoD
Round Trip Efficiency	>98%

Manuals

Warranty

Certifications

Data Sheets

eFlex MAX BOM

Part	Description	Qty
1	eFlex MAX 5.4kWh	1
2	1¼ -Inch Threaded Conduit Fitting	1
3	Busbar Top Cover	1
4	Top eFlex MAX Cover	1
5	Wall Mount Bracket	1 Pair
6	Manual	1
7	Busbar (300A)	1 Pair
8	Busbar Bottom Cover	1
9	Wall Mount template	1
10	Floor Mount Bracket	1 Pair
11	Back Support	1
12	2-Way RJ45 Splitter	1
13	ENVY & Sol-Ark Battery-Inverter COMM Cable (2 ft.)	2
14	IP65 Battery-Inverter Comm Cable (9.8ft.)	1
15	IP65 Battery-Battery Comm Cable (1.15ft.)	1
A	M4 * 8 Stainless Steel Cross Recessed Countersunk Head Screw	2
B	M4 * 6 Stainless Steel Cross Pan Head Screw	5+1
C	M8 * 16 Combination Cross Groove Recessed Hexagonal Head Bolt	4
D	M4*25 Hexagonal Socket Head Cap Screw	3
E	M6 * 20 European Standard 30, T-bolt & M6 Flange Nut	6+1extra
f	M8*60 Expansion Screw	4
G	M6*50 Wood Screw	4