A green and black 12V 368Ah EX1 battery from Expion360 designed for high performance in RVs, marine, and off-grid applications.
12V 368Ah LiFePO4 Lithium Battery – EX1 | Expion360
12V 368Ah LiFePO4 Lithium Battery – EX1 | Expion360
12V 368Ah LiFePO4 Lithium Battery – EX1 | Expion360
12V 368Ah LiFePO4 Lithium Battery – EX1 | Expion360

12V 368Ah LiFePO4 Lithium Battery – EX1 | Expion360

EX-360XDP-C

Expion360 12V 368Ah LiFePO4 Battery – EX1 Extreme Density

Power your off-grid lifestyle with the Expion360 EX1 368Ah, a beast of a battery engineered for extreme energy density. By utilizing advanced UL1642 recognized cylindrical cells, this single unit delivers a massive 368 Amp-Hours of capacity—equivalent to four standard Group 27 batteries—in a compact, proprietary footprint.

Designed for high-demand applications in large RVs and off-grid cabins, the EX1 features an IP55 water-resistant case and an integrated mounting system for secure installation. To handle the immense power output of this extreme density battery, we utilize oversized brass terminals that maximize electrical connectivity and reduce heat buildup for enhanced safety. With full UL1973 compliance and a 12-year warranty, it provides a safe, reliable, and massive foundation for any high-capacity power bank.

Best For:

  • RV house battery systems
  • Overland and off-grid vehicles
  • Marine and boat power systems
  • Backup power and mobile work setups
  • Off-grid cabins and remote installations

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Regular price$1,999.00
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  • Unbeatable Value: 368Ah of Pure Power Get maximum energy storage for your dollar. This "EX1 Standard" model delivers the same massive 368Ah capacity as our advanced lines but focuses purely on raw performance. It allows you to replace a heavy bank of lead-acid batteries with a single, cost-effective lithium unit, perfect for budget-conscious builds that still demand extreme power.
  • Extreme Density 4.0Ah Cell Technology Engineered with our time-tested 4.0Ah UL1642 recognized stainless steel encased cylindrical cells. These cells provide exceptional structural integrity and energy density, allowing us to pack 368Ah into a compact footprint (EX1 case) that fits where other battery banks cannot.
  • Rugged IP55 Construction Built for the long haul in tough environments. The ruggedized case features an IP55 rating, protecting your power source from dust ingress and low-pressure water jets. Whether installed in a marine engine room or an exterior RV compartment, it stands up to the elements.
  • Simplified Installation with Integrated Mounting Save time and money on installation hardware. The EX1 case includes molded mounting feet, allowing you to bolt the battery directly to your floor or tray without purchasing expensive aftermarket brackets or tie-down straps.
  • 12-Year Warranty & UL Compliance Invest with total peace of mind. Expion360 backs this battery with an industry-leading 12-Year Warranty. The entire battery system is UL1973 compliant, ensuring it meets the strictest safety standards for mobile and off-grid energy storage.

Technical Specifications
Nominal Voltage 12.8V
Capacity 368Ah
Weight 100.4 lbs (45.5 kg)
Dimensions 14.8" L x 13.0" W x 10.4" H
(375mm x 330mm x 265mm)
Charge Voltage 14.4V - 14.6V
Terminals Oversized Brass
Communication None (Internal BMS)

Product Spec Sheet and User Manual

Product Spec Sheet

View Spec Sheet

Advanced LiFePO4 Lithium Chemistry for Unmatched Longevity


Experience the pinnacle of energy storage with our high-grade LiFePO4 (Lithium Iron Phosphate) chemistry. Unlike traditional lead-acid batteries that fail after a few hundred cycles, the Expion360 e360 series is engineered for long cycle life, providing over 3,000 to 5,000 cycles at deep depths of discharge. Utilizing robust stainless steel encased 26650 cylindrical cells, this battery offers superior thermal stability and structural integrity, ensuring your power investment lasts for a decade or more of adventure.

OEM-Ready Design for Scalable Power Systems

Whether you are a DIY enthusiast or a professional upfitter, our OEM-ready design offers the ultimate flexibility for scalable power systems. Featuring standard BCI group sizing for a direct drop-in fit and integrated CAN Bus communication, these batteries are built to grow with your needs. Seamlessly network multiple units in series or parallel to power heavy-duty inverters and sophisticated off-grid electronics, making it the preferred choice for high-end van builds and marine power grids.

EX1- 12V 368Ah LiFePO4 Lithium Battery – Features

Massive 368Ah Capacity

The ultimate power upgrade. This single EX1 unit provides 368 Amp-Hours of deep-cycle lithium power, equivalent to running four standard Group 27 batteries in parallel. It is the ideal solution for extended boondocking and high-power inverter setups.

Advanced Battery Management System (BMS)

The intelligent BMS acts as the brain of the battery, actively monitoring cell health 24/7. It provides fail-safe protection against overcharging, deep discharging, short circuits, and excessive currents, ensuring your battery operates safely for its entire 12-year warranty lifespan.

Controller Area Network (CAN Bus) Communication

Designed for advanced system integration, the built-in CAN Bus port allows the battery to communicate intelligently with compatible inverters, chargers, and system monitors. This ensures precise charging coordination and seamless data sharing for complex RV and marine builds.

Integrated Mounting System

Secure installation made easy. The EX1 housing features structural mounting points molded directly into the base. This allows you to bolt the battery securely to the floor of your RV or boat, ensuring it stays safely in place even on the roughest roads.

Oversized Brass Terminals

Engineered for maximum conductivity and mechanical strength, our oversized brass terminals provide a robust, low-resistance connection. This design minimizes heat buildup during high-current draws and ensures reliable power delivery for demanding electrical systems.

UL1973 Compliant Design

Engineered for safety. We utilize UL1642 recognized stainless steel cylindrical cells and a robust BMS to ensure the entire battery meets UL1973 compliance standards. This guarantees protection against thermal runaway, short circuits, and over-voltage events.

EX1 368Ah LiFePO4 Lithium Battery Technical Specifications

Battery Chemistry LiFePO4 (Lithium Iron Phosphate)
Nominal Capacity 368 Ah
Nominal Voltage 12.8 V
Group Size Custom EX1 Form Factor
Dimensions 14.8" L x 13.0" W x 10.4" H
(375mm x 330mm x 265mm)
Weight 100.4 lbs (45.5 kg)
Communication N/A (Standard Model)
Moisture Rating IP55 (Dust & Water Jet Resistant)
Cell Type UL1642 Recognized 4.0Ah Cylindrical Cells
Safety Compliance UL1973 Compliant, UL1642 Recognized Cells
Mounting Integrated Mounting Feet
Warranty 12 Years

FAQs

Technical Specifications

This is a 12V battery with a capacity of 368 Amp-hours (Ah).

  • Dimensions: 14.8 inches (L) x 13 inches (W) x 10.4 inches (H).
  • Weight: 100.4 lbs (45.5 kg).
  • Group Size: It utilizes a custom "EX1" case size

It uses LiFePO4 (Lithium Iron Phosphate) chemistry, which is known for its safety, stability, and long cycle life.

The battery is engineered with 4.0Ah UL1642 recognized stainless steel encased 26650 cylindrical cells. These are part of Expion360's "extreme density" line, designed to provide maximum power with minimal added weight compared to standard cells.

Durability & Safety

It has an IP55 moisture protection rating, meaning it is protected against dust ingress and low-pressure water jets from any direction.

The entire battery is UL1973 compliant, and the individual cells are UL1642 recognized (file no. MH64383), ensuring high safety standards

Expion360 offers a 12-year warranty on this battery.

Usage & Applications

It is engineered for demanding environments including:

  • RVs and Van builds
  • Overland vehicles
  • Marine vessels
  • Off-grid homes and cabins.

While specific orientation limits are often detailed in the manual, the battery is sold with compatible Battery

While specific orientation limits are often detailed in the manual, the battery is sold with compatible Battery Mounting Systems listed under accessories on the product page. Always refer to the user manual for specific installation instructions.

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