Ultra Slim 280Ah LiFePO4 Battery | 330A BMS

🔋 CUSTOM LITHIUM ULTRA SLIM 280AH LiFePO4 BATTERY – AUSTRALIAN MADE

280Ah • 12.8V LiFePO4 • 330A Continuous Discharge • Only 86mm High • Active Balancing • 7 Year Warranty

The Custom Lithium Ultra Slim 280Ah Battery is designed for high-capacity auxiliary power systems where conventional battery height and packaging simply will not work.

At only 86mm overall height, its ultra-slim aluminium enclosure makes it suitable for installation beneath false floors, behind seats, inside canopy walls and in other low-profile vehicle, caravan and RV locations.

Built in Brisbane using premium A-grade automotive LiFePO4 cells, it combines a high-current Heltech BMS, active cell balancing and a lightweight aluminium enclosure with a stated 330A continuous discharge capability.

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⭐ KEY FEATURES

📏 Only 86mm High
Provides 280Ah of lithium capacity in an ultra-low-profile enclosure designed for installations where vertical space is limited.

🔋 280Ah LiFePO4 Capacity
Substantial energy storage for larger touring, caravan, RV and off-grid auxiliary systems.

⚡ 330A Continuous Discharge
High-current capability supports demanding 12V loads and appropriately designed inverter systems.

🇦🇺 Australian Made
Built in Brisbane and supplied as a certified Australian Made product.

🧠 High-Current Heltech BMS
The battery management system helps protect against overheating, over-discharge and short-circuit conditions.

⚖️ Active Cell Balancing
The integrated active balancer helps manage individual cells and maintain consistent battery performance.

🛡️ Lightweight Aluminium Enclosure
The custom aluminium housing reduces unnecessary bulk while helping protect the internal cells and components.

🚙 Built for Touring & Corrugations
Internal components are insulated against vibration to help protect the battery during rough-road and remote-area travel.

🧪 Individually Bench Tested
Each battery is individually bench tested before supply as part of Custom Lithium's quality-control process.

🛡️ 7 Year Warranty
Backed by a full 7-year manufacturer warranty.

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📐 HIGH CAPACITY FOR LOW-PROFILE INSTALLATIONS

The Ultra Slim range is designed for applications where battery height is restricted but substantial capacity is still required.

The supplied overall dimensions are 620mm L × 373mm W × 86mm H, making the 280Ah model suitable for applications such as:

• Under false floors
• Behind suitable vehicle seats
• Inside canopy walls
• Under storage platforms
• Custom 4WD auxiliary systems
• Caravan & RV battery installations

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🚐 BUILT FOR SERIOUS OFF-GRID POWER

With 280Ah of lithium capacity, this battery can form the foundation of a substantial touring or off-grid electrical system.

It can support compatible equipment including:

• ❄️ 12V fridges & freezers
• 💡 Camp & vehicle lighting
• 📡 Starlink
• 💻 Computers & electronics
• 📷 Cameras & charging equipment
• 💨 Air compressors
• 🛠️ Compatible tools & battery chargers
• 🔌 240V appliances through a suitable inverter
• 🍳 Induction cooking through an appropriately designed inverter system

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🔋 PREMIUM LiFePO4 CELL TECHNOLOGY

The battery is constructed using A-grade automotive LiFePO4 cells, combined with a high-current BMS and active cell balancing.

The supplied product information positions LiFePO4 chemistry as a suitable choice for demanding vehicle and off-grid applications where safety, reliability and performance are important.

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📊 TECHNICAL SPECIFICATIONS

Capacity: 280Ah

Nominal Voltage: 12.8V

Continuous Discharge: 330A

Peak Discharge / Protection: 1060–1600A as specified by manufacturer

Recommended Charge Current: 100A

Charge Voltage: 14.2–14.6V

Absorption / Float Voltage: 13.4–13.6V

Low-Voltage Cut-Off: 10.5V

Operating Temperature: 0°C to 60°C

Terminals: M10

Overall Dimensions: 620mm L × 373mm W × 86mm H

Weight: Approx. 26.5kg

Battery Chemistry: LiFePO4

BMS: Heltech High-Current BMS

Cell Balancing: Active Balancer

Enclosure: Aluminium

Warranty: 7 Years

Manufactured: Brisbane, Australia

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⚡ HIGH-CURRENT PERFORMANCE

The stated 330A continuous discharge capability gives the 280Ah Ultra Slim substantial current capacity for larger auxiliary systems.

This makes it suitable for appropriately designed high-power inverter installations, but actual inverter compatibility depends on DC current demand, surge requirements, cable sizing, fuse protection, connection quality and BMS limits.

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🔌 CHARGING REQUIREMENTS

The supplied specifications recommend a charge current of up to 100A.

• Bulk / Charge Voltage: 14.2–14.6V
• Absorption / Float Voltage: 13.4–13.6V

If your charger provides a LiFePO4 profile matching these voltage requirements, that setting can be used.

Compatible lower-output DC-DC chargers such as 25A, 30A or 40A units can also be used, although recharge times will be longer with a 280Ah battery.

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🇦🇺 AUSTRALIAN MADE

Custom Lithium states that its Ultra Slim batteries are Australian Made and built in Brisbane.

Each battery is individually bench tested before supply and backed by a 7-year manufacturer warranty.

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📋 STANDARDS & COMPONENT COMPLIANCE

Custom Lithium states that its batteries are manufactured using IEC 62619-certified components and meet the recommendations of AS/NZS 3001.

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❓ QUICK FAQ

Where can the 280Ah Ultra Slim battery be installed?

Its 86mm-high design makes it suitable for low-profile spaces such as under false floors, inside canopy walls and other compact auxiliary battery locations where sufficient length and width are available.

Can I replace an AGM battery with this lithium battery?

Potentially, but your complete charging system must be lithium compatible. Check your DC-DC charger, solar regulator and 240V charger to ensure they support the required LiFePO4 charging profile before changing from AGM.

What charging profile should I use?

The supplied specifications call for a 14.2–14.6V charge voltage and 13.4–13.6V absorption/float voltage.

What size DC-DC charger can I use?

The stated recommended charge current is up to 100A. Smaller compatible chargers such as 25A, 30A or 40A units can also be used, but will take longer to recharge the 280Ah battery.

Can this battery run an inverter?

Yes. The stated 330A continuous discharge capability makes it suitable for appropriately designed high-current inverter systems. Actual inverter suitability depends on DC current demand, surge requirements, cable sizing, fusing and the complete electrical installation.

How do I restart the battery after a low-voltage BMS shutdown?

The supplied instructions describe using a lithium-compatible 240V charger with an appropriate power-supply mode to wake the BMS. Battery and charger manufacturer instructions should be followed during recovery.

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🔋 280AH OF LITHIUM POWER IN AN ULTRA-SLIM 86MM PACKAGE

With 280Ah of capacity, 330A continuous discharge capability, active balancing and an aluminium enclosure only 86mm high, the Custom Lithium Ultra Slim 280Ah is designed for high-capacity systems where conventional battery height is not an option.

High capacity. Ultra-slim installation. Australian made.