LiFePO4 Lithium Batteries - EX1 | Expion360
Deep Cycle LiFePO4 Lithium Batteries
Experience the next evolution of deep-cycle power. Expion360 LiFePO4 Lithium Batteries are engineered for the adventurer, the sportsman, and the off-grid enthusiast who demands reliability. Whether you are outfitting a Class B RV, a marine vessel, or a remote cabin, our batteries provide a lightweight, high-capacity solution that outperforms traditional lead-acid technology in every metric.
Powering Your Passion
The Expion360 Advantage
Engineering reliability where it matters most.
Invest with Confidence.
We stand behind our engineering with one of the most comprehensive warranties on the market. When you buy Expion360, you are securing reliable power for the next decade of adventures.
Real Experts, Right Here in Oregon.
No bots and no overseas call centers. Our dedicated team in Redmond, Oregon, is ready to help you size your battery bank, troubleshoot setups, and get you back on the road fast.
Certified for Peace of Mind.
Safety isn't optional. Our batteries are rigorously tested to meet UL 1973 standards for stationary energy storage, ensuring maximum protection against overheating, vibration, and electrical faults.
Power Through the Freeze.
Don't let winter stop you. Our exclusive Vertical Heat Conduction (VHC™) system evenly warms the battery core, allowing you to safely charge your system even when temperatures drop well below freezing.
Trusted by Adventurers Everywhere
Why Choose Expion360? A Look Inside.
Smart BMS (Battery Management System)
Our proprietary "Smart" BMS protects your investment. It features low-temp discharge and auto-shutoff for cold weather performance, alongside high/low voltage shutoffs, short-circuit protection, and overcurrent disconnects. The BMS is structurally bolted to the pack with an oversized heatsink for years of trouble-free operation.
Robust Case Design
We are the first in the industry to integrate rubber feet directly into the case, eliminating vibration and sliding. The case is crafted from fiberglass-infused ABS plastic (meeting UL 94V-0 fire retardant ratings) with radiused corners for structural strength.
Superior Power Transfer
We eliminated fragile solder points. Our cells are welded via thick copper machined collector plates, creating a mechanical backbone that reduces resistance and heat buildup. Our terminal pads are 96.7% larger than standard terminals, featuring opposing connection points for flexible mounting and reduced cross-polarity risks.
Industry-Leading 12-Year Warranty
Buying lithium is an investment in your freedom. We back that investment with a 12-year warranty—one of the best in the business. Combined with our U.S.-based customer support team trained specifically in lithium technology, you can explore with total confidence.
FAQs
The EX1 is a custom Expion360 form factor designed for maximum energy density. It is physically larger than standard Group 24/27 batteries but much smaller than the 4-6 batteries it replaces.
- 368Ah Dimensions: Approx. 14.8" L x 7.7" W x 13.0" H
- 450Ah Dimensions: Approx. 19.1" L x 7.7" W x 13.0" H
Always measure your battery compartment to ensure these will fit.
]Simplicity and efficiency. Every time you connect batteries in parallel, you introduce resistance and potential failure points (cables, lugs, connections). A single EX1 450Ah battery removes those variables, giving you a cleaner, safer install that is often lighter and easier to manage than a bank of four separate 100Ah batteries.
Yes. A single EX1 battery has enough capacity and continuous discharge current to power high-draw appliances like air conditioners, microwaves, and induction cooktops (when paired with an appropriate inverter). For example, a 450Ah EX1 can run a typical RV air conditioner for several hours without solar input.
Because the EX1 does not fit standard battery boxes, we offer specific EX1 Mounting Kits. These heavy-duty brackets secure the battery directly to the floor of your compartment, ensuring it stays locked in place during rough travel or marine conditions.
Absolutely. Despite its massive size, the EX1 series uses the same UL 1642 recognized cells and premium construction as our other lines, and it is backed by our industry-leading 12-year warranty.
While UL 1973 covers the entire battery pack, UL 1642 focuses specifically on the individual lithium cells inside. Using UL 1642 recognized cells ensures that the foundational building blocks of our batteries have been independently tested for stability and safety. We don't cut corners; we build our packs using only top-tier, certified cells to ensure maximum longevity and reliability.