Dual Battery Kits

A person holds a large battery labeled “TECH120” while installing it into the engine compartment of a white vehicle outdoors at sunset.
Clear all filters

Showing 53 of 53 products

Sort by:
Filter and sort

Filter and sort

Showing 53 of 53 products

Clear all filters
Clear all filters
Showing 53 of 53 products
  • The iTechworld Complete 4WD Dual Battery Kit features a 240Ah lithium battery, inverter, display, charger, fuse, wiring, and brackets—ideal for reliable off-grid power in your 4WD.

    iTechworld
    Complete 4WD Dual Battery Kit
    240Ah Lithium

    $2,883.25
    $2,883.25
    $3,794
    Gift with Purchase
    View Product
  • The iTechworld Premium 4WD Dual Battery Kit offers a 240Ah LiFePO₄ battery in orange/black casing, battery monitor display, charger, mounting brackets, power cables, and connectors—all branded by iTechworld—ideal for off-grid setups.

    iTechworld
    Premium 4WD Dual Battery Kit
    240Ah Lithium

    $1,838.15
    $1,838.15
    $2,296
    Gift with Purchase
    View Product
  • The iTechworld Slimline 4WD Dual Battery Kit 100Ah Lithium, featuring a lithium battery, digital monitor, DCDC MPPT charger, mounting tray, and various wiring cables.

    iTechworld
    Slimline 4WD Dual Battery Kit
    100Ah Lithium

    $1,052.45
    $1,052.45
    $1,635
    Gift with Purchase
    View Product
  • ITechworld Base Slimline 4WD Dual Battery Kit 100Ah Lithium, featuring a slim lithium battery, a DC-to-DC battery charger, a coil of electrical wiring, and various terminal connectors and zip ties.

    iTechworld
    Base Slimline 4WD Dual Battery Kit
    100Ah Lithium

    $918.59
    $918.59
    $1,198
    Gift with Purchase
    View Product
  • The iTechworld Base 4WD Dual Battery Kit 240Ah Lithium, including a black power inverter and red cable, is shown on a white background—essential gear from iTechworld for powering your 4WD adventures.

    iTechworld
    Base 4WD Dual Battery Kit
    240Ah Lithium

    $1,694.59
    $1,694.59
    $2,098
    Gift with Purchase
    View Product
  • An iTechworld | Expansion Ute Dual Battery Kit | 120Ah Lithium containing a lithium battery, power control hub, solar panel, inverter, battery charger, and various electrical cables and connectors for off-grid power.

    iTechworld
    Expansion Ute Dual Battery Kit
    120Ah Lithium

    $2,060.55
    $2,060.55
    $3,119
    Gift with Purchase
    View Product
  • ITechworld Ultimate Ute Dual Battery Kit with a 120Ah LiFePO₄ battery, 1000W pure sine wave inverter, solar panel, chargers, digital displays, wiring harnesses, and electrical connectors for an off-grid power system.

    iTechworld
    Ultimate Ute Dual Battery Kit
    120Ah Lithium

    $1,880.05
    $1,880.05
    $2,829
    Gift with Purchase
    View Product
  • The iTechworld | Complete Ute Dual Battery Kit | 120Ah Lithium includes a large lithium battery, a 1000W pure sine wave inverter, a 25A battery charger, a digital monitor, wiring, cables, and mounting accessories.

    iTechworld
    Complete Ute Dual Battery Kit
    120Ah Lithium

    $1,755.70
    $1,755.70
    $2,580
    Gift with Purchase
    View Product
  • Displayed separately on a white background are a lithium battery, DC-DC MPPT charger, battery monitor, mounting tray, and red wire cable—components of the iTechworld Premium Ute Dual Battery Kit with 120Ah Lithium.

    iTechworld
    Premium Ute Dual Battery Kit
    120Ah Lithium

    $1,130.05
    $1,130.05
    $1,447
    Gift with Purchase
    View Product
  • The iTechworld Base Ute Dual Battery Kit (120Ah Lithium) includes a black and orange lithium battery, DCDC MPPT charger, and red coiled wire—perfect for your ute’s lithium power system or off-grid applications.

    iTechworld
    Base Ute Dual Battery Kit
    120Ah Lithium

    $996.19
    $996.19
    $1,298
    Gift with Purchase
    View Product
  • The iTechworld Premium Slimline 4WD Dual Battery Kit features a 100Ah lithium battery, control panels, wiring harnesses, connectors, and mounting accessories—all arranged on a white background.

    iTechworld
    Premium Slimline 4WD Dual Battery Kit
    100Ah Lithium

    • 100Ah Lithium Battery Power
    • 12V Mini Control Box
    $1,239.20
    $1,239.20
    $1,347
    Gift with Purchase
    View Product
  • The iTechworld Premium GoFurther Battery Box Bundle Kit includes an iTECH120X Lithium Battery, iTECHDCDC25 Charger, power cables, mounting bracket, and wiring accessories—ideal for off-grid or dual-battery setups.

    Premium GoFurther
    Battery Box Bundle
    with iTECHDCDC25 Charger and iTECH120X Lithium Battery - Kit

    • Inbuilt surge protections
    • Integrated DCDC25
    $1,208.62
    $1,208.62
    $1,378
    Gift with Purchase
    View Product
  • The iTechworld 200Ah Control Hub Kit includes a control panel, battery charger, cables, and two iTECH100Ah lithium batteries by iTechworld, all shown on a white background.

    iTechworld
    200Ah Control Hub Kit
    with 2 x iTECH100Ah Lithium

    $1,199
    $1,199
    $1,636
    Gift with Purchase

Dual Battery Kits

Dual Battery Systems Built for Aussie Setups

When you need dependable power beyond the bitumen, iTechworld dual battery systems are ready and waiting to power your next adventure. Every product we engineer is tried and tested for harsh Australian conditions, meaning they’re ready for bush, beach and everything in between. These dual batteries give you the freedom to run fridges, lights, and other essential 12V gear without draining your starter battery.

Heading off-grid? Or setting up a touring rig? Whatever you need it for, our dual battery systems are the perfect combination of high-performance components with smart charging to keep your power steady and your starter safe. Don’t waste time on battery solutions that aren’t up to scratch. Whether it’s a dual battery setup, a ready-to-go caravan system, or one of our trusty 4WD systems, we’re a family-owned power expert that’ll get it right the first time round. 

Power Any Adventure With iTechworld’s Dual Battery Systems

  • All-in-One Power Solution: There’s no need to mix and match; these are the best dual battery systems for DCDC charging, AC mains charging, battery isolation, fuse protection, and compact mounting. 

  • Smart Multi-Stage Charging: Supports true multi-stage charging for lithium, AGM, and lead-acid batteries. This extends cell life by slowing down and maintaining charging as it approaches 100%. 

  • Mobile-Ready Design: Rugged, compact housings make installation quick and simple in tight spaces. These dual dual battery systems are made for small 4x4s, under seats, in canopies, or marine even compartments.

  • Auto Recovery and Protection: Built-in safeguards for voltage, temperature, and current mean your adventures are always powered safely.

  • Plug-and-Play Simplicity: Designed to work out of the box, making them ideal for those looking for a no-fuss, complete system.

  • Designed and Tested in Australia: Engineered to handle everything from red dust and coastal salt air to extreme temperatures and tough off-road use.

  • Real-World Support: Backed by local experts who know dual battery systems inside and out. No call centres and no scripts; just classic Aussie support.

FAQs

What is a dual battery system, and how does it function?

A dual battery system uses two batteries: one to start your vehicle, and a secondary (auxiliary) battery to power accessories like fridges or lights. An isolator or DCDC charger keeps the starter battery protected while the auxiliary battery keeps your gear running.

What are the benefits of installing a dual battery system in my vehicle?

You can run 12V gear without draining your starter battery. It extends off-grid capability, keeps your fridge cold, and ensures your vehicle always starts when you need it.

Can I use my existing alternator to charge both batteries in a dual battery setup?

Yes, but you'll need a DCDC charger to properly manage voltage and protect lithium or AGM batteries. 

How do I properly install a dual battery system in my vehicle?

Always mount the auxiliary battery nice and secure, install a DCDC charger or isolator, connect fuses and cables, and test the system. Many setups are DIY-friendly, but complex rigs can use a professional install.

Do I need a dual battery system for camping or off-grid adventures?

Absolutely. If you plan to run a fridge, lights, or charge devices while parked, a dual battery system is a must-have for reliable power.

What components are essential for a reliable dual battery system?

You'll need a second battery, DCDC battery charger or isolator, fuses, cables, and a battery monitor for performance tracking.

How does a battery isolator work in a dual battery setup?

It automatically separates the starter and auxiliary batteries so the starter battery doesn't get drained by accessories.

Can I use different types of batteries (e.g., AGM and lithium) in a dual battery system?

Yes, but you must use a DCDC charger that supports both battery types to avoid damage and ensure proper charging profiles.

What maintenance is required for a dual battery system?

Check connections regularly, monitor voltage levels, and keep battery terminals clean. Lithium batteries require less maintenance than lead-acid.

Is it safe to install a dual battery system myself, or should I seek professional assistance?

If you're confident with 12V systems, you can DIY. Otherwise, it’s worth having a qualified installer ensure everything’s safe and compliant.

How does a dual battery system impact my vehicle's electrical system?

If installed correctly, it has minimal impact. Using proper chargers and isolators ensures your alternator and wiring aren’t overloaded.

Can a dual battery system be integrated with solar panels for charging?

Yes, pair yours with an off the grid solar system, solar blanket or fixed panel, and a compatible solar regulator or MPPT-enabled DCDC charger.

What are the common issues faced with dual battery systems, and how can they be resolved?

Common issues include poor connections, flat starter battery, or incorrect charger settings. Regular checks and proper installation fix most problems.

How do I monitor the performance and charge levels of both batteries in the system?

Use a dedicated battery monitor to track voltage, current, and charge status. Many units offer real-time data and alarms.

FAST & RELIABLE SHIPPING

Straight from our HQ to your doorstep - wherever you are in Australia, we get your gear to you fast.

Money Back Guarantee

If you're not completely satisfied with your purchase, we'll make it right. No questions asked.

Legendary Support

Real Aussie experts, real support. We’re here when you need us, no offshore call centres.

Proudly Australian

100% Aussie-owned and operated, delivering top-quality power solutions to Australians, by Australians.