Description

12v 334AH DIY BUNDLE

The perfect entry point for building your own high-capacity 12V lithium battery system. This semi-DIY bundle includes premium-grade components designed for serious off-grid, caravan, 4WD, marine, and energy storage applications.

Built around genuine high-capacity EVE Automotive Grade LiFePO4 cells, this kit delivers exceptional cycle life, safety, and performance compared to lower-grade alternatives commonly found online.

This product is not designed to be the lowest cost battery product, its designed for DIY hobbyists, who have an interest in aseembling their own battery with good quality parts.

What’s Included

• 4 x EVE 334AH (345+AH typical) Automotive Grade LiFePO4 Cells
• 1 x 12V 300A JK Smart BMS with integrated 2A Active Balancer
• 1 x Heavy Duty 300AH Plastic Battery Box

What you will need to supply

Cables, Crimpers, fuses etc

Premium Automotive Grade Cells

These are genuine Automotive Grade large-format prismatic cells — the same class of cells used in demanding EV and commercial energy storage applications. Typical tested capacity is often 345AH or higher, giving you even more usable energy than standard 300AH kits.

Compared to lower-grade cells, Automotive Grade cells offer:

• Longer cycle life
• Better consistency between cells
• Lower internal resistance
• Improved reliability under high loads
• Excellent performance for inverter systems

Massive Power Capability

The included 300A JK Smart BMS allows this battery to handle serious loads, making it suitable for:

• Large inverters
• Off-grid systems
• High-power caravans and RVs
• 12V air conditioners
• DC chargers
• Electric cooking systems
• Marine applications

The integrated 2A active balancer continuously balances cells during operation, helping maintain optimal battery health and improving long-term performance.

DIY Made Easier

This is the ideal semi-DIY option for customers wanting to build their own high-performance lithium battery without sourcing the main parts separately.

Estimated Specifications

• Nominal Voltage: 12.8V
• Capacity: 334AH+
• Energy Storage: Approx. 4.2kWh
• Recommended Charge Voltage: 14.2V – 14.4V
• Max Continuous Discharge: 300A
• Chemistry: LiFePO4 (Lithium Iron Phosphate)

Ideal For

• 4WD touring setups
• Caravan and RV systems
• Marine applications
• Off-grid power systems
• Backup power
• DIY solar storage projects

Built with premium components and designed for serious performance, this bundle gives you the flexibility of DIY with the confidence of professionally selected hardware.