Dual Battery Systems

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

4WD DUAL BATTERY KITS

Designed for explorers who need reliable 12V energy to run fridges, lights, and accessories wherever the tracks take you.

The iTECH100SS Behind the Seat Kit with Bluetooth includes a slim 12V lithium battery, matching black DCDC charger, assorted power cables, connectors, and mounting hardware, all shown on a white background.

iTECH100SS
Behind the Seat Kit
with Bluetooth

5.0
Rated 5.0 out of 5 stars
1 Review
  • Slimline design
  • Bluetooth BMS
$949
$949
$1,556
The iTechworld Premium Slimline 4WD Dual Battery Kit features a 100Ah Lithium battery, voltage display, power controller, fuse, cables, connectors, and mounting bracket—ideal for canopy power setups and shown neatly arranged on a white background.

iTechworld
Premium Slimline 4WD Dual Battery Kit
100Ah Lithium

  • 100Ah Lithium Battery Power
  • 12V Mini Control Box
$1,088.70
$1,088.70
$1,805
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The iTechworld Complete Lithium 4WD Kit (210-240Ah) features two LiFePO4 batteries, a 2000W inverter, 40A DC-DC charger, cables, fuses, and a digital display—an ideal off-road power solution for any adventure.

Complete
Lithium 4WD Kit
210-240Ah

5.0
Rated 5.0 out of 5 stars
1 Review
  • 2000W Pure Sine Wave Inverter
  • iTECHDCDC40 Charger
From $2,432.95
From $2,432.95
$3,771
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Complete | Slimline 4WD Kit | 200Ah - iTechworld

Complete
Slimline 4WD Kit
200Ah

  • 200ah Lithium Battery Power
  • iTECHDCDC40 Charger
From $2,147
From $2,147
$3,550
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The Complete | Lithium 4WD/Caravan Kit | 240Ah features two lithium batteries, a 2000W inverter, a 40A DC charger, cables, and battery monitors—ideal for any 12V setup, all arranged on a white background.

Complete
Lithium 4WD/Caravan Kit
240Ah

4.9
Rated 4.9 out of 5 stars
19 Reviews
  • 240ah dual battery system
  • Bluetooth BMS
From $2,599
From $2,599
$4,120
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The iTechworld Expansion 4WD Dual Battery Kit (240Ah Lithium) by iTechworld includes a lithium battery, pure sine wave inverter, solar panel, control panel, cables, fuses, and mounting hardware—displayed on a white background.

iTechworld
Expansion 4WD Dual Battery Kit
240Ah Lithium

$3,258.50
$3,258.50
$4,475
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The Ultimate | 4WD Kit | with iTECH200SS includes a slim lithium battery, 3000W inverter, chargers, cables, fuses, and a battery monitor—perfect for your dual battery setup—all displayed on a white background.

Ultimate
4WD Kit
with iTECH200SS

5.0
Rated 5.0 out of 5 stars
1 Review
  • Slimline Design
  • Bluetooth BMS
From $2,799
From $2,799
$3,790
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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

$852.15
$852.15
$1,398
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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

$983.25
$983.25
$1,636
View Product
The iTechworld Complete Ute Dual Battery Kit (120Ah Lithium) by iTechworld is shown with a pure sine wave inverter, monitoring display, chargers, wiring, and accessories arranged on a white background.

iTechworld
Complete Ute Dual Battery Kit
120Ah Lithium

$1,643.50
$1,643.50
$2,362
View Product
The iTechworld Ultimate Ute Dual Battery Kit features a 120Ah LiFePO₄ battery, solar panel, pure sine wave inverter, controller, monitor, cables, fuse, charger, and mounting brackets—everything needed for off-grid power.

iTechworld
Ultimate Ute Dual Battery Kit
120Ah Lithium

$1,809.75
$1,809.75
$2,611
View Product
The iTechworld Expansion Ute Dual Battery Kit 120Ah Lithium comes with a lithium battery, solar panel, inverter, cables, charger, control panels, and mounting brackets—all shown on a white background.

iTechworld
Expansion Ute Dual Battery Kit
120Ah Lithium

$2,018.75
$2,018.75
$2,851
View Product
Shop 4WD DUAL BATTERY KITS

CANOPY DUAL BATTERY KITS

Modular, secure, and ready to install — ideal for tradies, tourers, and weekend warriors who need organised power inside their canopy.

The iTechworld Expansion Canopy Dual Battery Kit (160Ah Lithium) includes LiFePO₄ batteries, solar panel, power control unit, inverter, charger, cables, leads, and mounting brackets—all by iTechworld.

iTechworld
Expansion Canopy Dual Battery Kit
160Ah Lithium

$2,832.90
$2,832.90
$3,927
View Product
The iTechworld Ultimate Canopy Dual Battery Kit 160Ah Lithium, with solar panel, pure sine wave inverter, controllers, cables, display screens, and devices from iTechworld, is arranged on a white background.

iTechworld
Ultimate Canopy Dual Battery Kit
160Ah Lithium

$2,684.70
$2,684.70
$3,791
View Product
The iTechworld Complete Canopy Dual Battery Kit, featuring a 160Ah lithium battery, pure sine wave inverter, monitor screens, chargers, cables, and connectors from iTechworld, arranged on a white background.

iTechworld
Complete Canopy Dual Battery Kit
160Ah Lithium

$2,518.45
$2,518.45
$3,542
View Product
The iTechworld Premium Canopy Dual Battery Kit features a 160Ah Lithium battery, black charger, digital display meter, red power cable, and mounting bracket—ideal for reliable portable power.

iTechworld
Premium Canopy Dual Battery Kit
160Ah Lithium

$1,391.75
$1,391.75
$1,936
View Product
The iTechworld Base Canopy Dual Battery Kit 160Ah Lithium sits above a black charger, red Anderson plug with cables, a coiled red cable, and components suited for dual battery setups.

iTechworld
Base Canopy Dual Battery Kit
160Ah Lithium

$1,260.65
$1,260.65
$1,698
View Product
The iTechworld Expansion Super Slimline Canopy Dual Battery Kit (300Ah Lithium) is a complete off-grid solar solution with charge controller, panel, inverter, cables, fuse, alligator clips, mounting hardware & monitoring display—all iTechworld branded.

iTechworld
Expansion Super Slimline Canopy Dual Battery Kit
300Ah Lithium

$3,401.95
$3,401.95
$4,726
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The iTechworld Ultimate Super Slimline Canopy Dual Battery Kit offers a 300Ah lithium system with pure sine wave inverter, solar panel, cables, fuse, monitor display, and connectors—ideal for efficient canopy power solutions.

iTechworld
Ultimate Super Slimline Canopy Dual Battery Kit
300Ah Lithium

$3,249.95
$3,249.95
$4,586
View Product
The iTechworld Complete Super Slimline Canopy Dual Battery Kit (300Ah Lithium) includes inverter, charger, meter display, cables, fuse, wiring, and connectors—perfect for an off-grid power setup and shown on a white background.

iTechworld
Complete Super Slimline Canopy Dual Battery Kit
300Ah Lithium

$3,083.70
$3,083.70
$4,337
View Product
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UTE DUAL BATTERY KITS

Built for utes and service vehicles that demand reliable energy for tools, lighting, and remote operation.

The iTechworld Expansion Ute Dual Battery Kit 120Ah Lithium comes with a lithium battery, solar panel, inverter, cables, charger, control panels, and mounting brackets—all shown on a white background.

iTechworld
Expansion Ute Dual Battery Kit
120Ah Lithium

$2,018.75
$2,018.75
$2,851
View Product
The iTechworld Ultimate Ute Dual Battery Kit features a 120Ah LiFePO₄ battery, solar panel, pure sine wave inverter, controller, monitor, cables, fuse, charger, and mounting brackets—everything needed for off-grid power.

iTechworld
Ultimate Ute Dual Battery Kit
120Ah Lithium

$1,809.75
$1,809.75
$2,611
View Product
The iTechworld Complete Ute Dual Battery Kit (120Ah Lithium) by iTechworld is shown with a pure sine wave inverter, monitoring display, chargers, wiring, and accessories arranged on a white background.

iTechworld
Complete Ute Dual Battery Kit
120Ah Lithium

$1,643.50
$1,643.50
$2,362
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

$983.25
$983.25
$1,636
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

$852.15
$852.15
$1,398
View Product
Shop UTE DUAL BATTERY KITS

Dual Battery Systems

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.

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