- Mobile Service: We Come To You
- Mobile Service
Dual Battery Systems
A dual battery system is one of the most important upgrades for anyone running fridges, lighting, compressors, Starlink, battery chargers or other accessories while travelling. The right system allows you to power your gear with confidence while protecting your starter battery and ensuring your vehicle remains reliable.
Modern vehicles and lithium batteries require more than simply connecting a second battery. Correct charging rates, battery selection, cable sizing and alternator management all play a critical role in system performance and long-term reliability. That’s why every dual battery system we install is carefully designed around your vehicle, battery bank and how you actually use it.
- Lifetime Warranty on all Workmanship
|
- Mobile Service - We Come To You
POWER YOU CAN RELY ON
Reliable Power Wherever You Travel
Whether you’re building a touring 4WD, work ute, custom canopy setup or upgrading your caravan charging system, we use proven charging solutions that maximise battery performance while keeping your charging system operating safely and efficiently.
From simple auxiliary battery installations through to advanced lithium battery systems with DC-DC charging, solar integration and battery monitoring, every installation is completed using quality components, proper circuit protection and professional workmanship.
A properly designed dual battery system gives you the confidence to travel further, stay longer and power your essentials without worrying about your batteries.
DUAL BATTERY OPTIONS
Everything we supply and install to keep you connected, safe and tracked wherever the road goes.
Under Bonnet Systems
Where space allows, an under-bonnet dual battery system is a neat and practical solution that keeps the auxiliary battery protected and out of the way while providing reliable power for touring and work applications.
Behind Seat Systems
Ideal for modern dual-cab utes where under-bonnet space is limited. Behind-seat battery systems provide substantial power capacity without sacrificing tray or canopy space.
Canopy Power Systems
Designed for serious touring and work vehicles, canopy systems can incorporate lithium batteries, solar charging, inverters, DC-DC chargers and advanced monitoring to create a complete off-grid solution.
Portable Battery Systems
A flexible option that can be moved between vehicles, trailers, boats and campsites while still providing reliable power for fridges, lighting and accessories.
Caravan Charging Systems
Ensure your caravan batteries receive the correct charge while travelling. We design charging systems that maximise battery performance and integrate seamlessly with your existing setup.
Lithium Battery Upgrades
Upgrade outdated battery systems with modern lithium technology for increased usable capacity, faster charging and reduced weight.
Why Choose Coast Custom 12 Volt?
- Fully mobile service
- Custom designed systems
- Clean, reliable wiring practices
- Quality components and installation standards
- AS/NZS compliant installations
- Servicing Warwick, Toowoomba & Southern Downs
Moblie Service
Our Service Locations
Based in Warwick, Qld, we travel across the Southern Downs and Darling Downs for Starlink and connectivity installs.
Related Services
Starlink & Connectivity
Starlink and signal boosting so you can stream, work and stay reachable wherever you roam.
SOLAR SOLUTIONS
Roof and portable solar with Victron MPPT, sized to keep your batteries charged.
OFF-GRID SYSTEMS
Complete power systems so your fridge runs and lights stay on, no matter how remote.