Coast Custom 12 Volt

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Coast Custom 12 Volt โ€” specialists in off-grid, solar & 12 V power systems for caravans, campers, 4WDs & trucks.
โšก Premium installs | Mobile Service
๐Ÿ“ Warwick QLD

Not every job we do is about building a massive off-grid system. โšก๏ธDid you know we also do a lot of work upgrading, repa...
25/09/2026

Not every job we do is about building a massive off-grid system. โšก๏ธ

Did you know we also do a lot of work upgrading, repairing and rewiring existing 12V systems to make them safer, more reliable and easier to service?
Here's a great example of a before & after.
The original system had a lot going on โ€” multiple cable runs, components added over time and wiring that could be improved.
Rather than simply replacing everything, we reworked the system, improved the cable management, upgraded the protection where required and brought everything together into a much cleaner and more serviceable installation.
The result? A system that's easier to understand, easier to work on and, most importantly, safer and more reliable.
๐Ÿ”ง Reworking existing wiring
๐Ÿ”ง Correct cable sizing
๐Ÿ”ง Appropriate fusing and circuit protection
๐Ÿ”ง Improved cable routing and protection
๐Ÿ”ง Cleaner battery and distribution areas
๐Ÿ”ง Making systems easier to diagnose and service
You don't always need a complete new system. Sometimes your existing system just needs some attention.
If you're unsure about the wiring in your caravan, 4WD or camper, we're happy to have a look and talk you through what can be improved.
Quality 12V isn't just about the components you use โ€” it's about how the whole system is installed.

๐Ÿ“ Warwick โ€ข Toowoomba โ€ข Stanthorpe โ€ข Southern Downs

Viscount Wild Shark โ€” Off-Grid Ready! โšก๏ธThe owners came to us knowing they wanted to improve their off-grid capability, ...
22/09/2026

Viscount Wild Shark โ€” Off-Grid Ready! โšก๏ธ

The owners came to us knowing they wanted to improve their off-grid capability, but weren't quite sure what system they needed. After sitting down, discussing how they use their van and looking at the available options, we designed a system that gives them the capability they were after without spending money where it wasn't necessary.

The new system includes:

๐Ÿ”‹ LiFeTek 660Ah Slimline Lithium Battery โ€” plenty of stored energy for extended time off-grid.

โšก Victron MultiPlus 3000/120 Inverter/Charger โ€” providing reliable 240V power throughout the van for the air conditioner, microwave, kettle and more, while also providing fast mains charging when connected to power.

๐Ÿš™ Victron Orion XS 50A DC-DC Charger โ€” providing efficient charging from the tow vehicle while travelling.

โ˜€๏ธ 1,500W of Exotronic Solar โ€” managed by a Victron 100/50 and 2 ร— Victron 100/30 MPPT controllers, maximising the available solar input.

๐Ÿ”Œ External Anderson solar input โ€” allowing additional portable solar to be connected when required.

๐Ÿ“Š Victron Cerbo GX Mk2 & Touch 70 Display โ€” giving the owners complete visibility of their battery, solar and charging system.

We also retained the existing BMPro system, but removed all of its charging functions and kept it purely as a dedicated fuse block. The factory water tank monitoring was also retained.

This allowed us to make use of existing equipment where it made sense, keeping the costs down without compromising the new off-grid system.

It's not always about replacing everything in the van โ€” it's about understanding what you already have, what you actually need and designing the system around how you travel.

Another Viscount Wild Shark ready for some serious off-grid adventures. ๐ŸŒโšก๏ธ

Coast Custom 12 Volt โ€” quality components, quality workmanship, built around how you travel.

01/09/2026

16ft hybrid camper. 1280ah of power. Serious off-grid capability.

The Coast Custom Standard. Itโ€™s what you donโ€™t always see that matters. โšก๏ธThese photos might just look like a battery in...
28/08/2026

The Coast Custom Standard. Itโ€™s what you donโ€™t always see that matters. โšก๏ธ

These photos might just look like a battery installation, but thereโ€™s a lot more to a reliable 12V system than simply connecting a few batteries together.

At Coast Custom 12 Volt, we take pride in the details โ€” from correct cable sizing and routing through to circuit protection, battery connections, isolation and ensuring the system is built to be reliable, safe and serviceable for years to come.

No unnecessary joins.
No undersized cabling.
No guessing.
No shortcuts hidden behind a cover.

Just properly selected components, quality installation practices and attention to detail from start to finish.

A clean installation isn't just about making it look good on day one. It's about making sure everything is secure, accessible, protected and capable of handling the job it was designed for.

Because when you're hundreds or thousands of kilometres from home, reliability matters.

Every system we build is designed around the individual application and installed to comply with the relevant requirements of AS/NZS 3001.2:2022.

Built properly. Built to last. Built for the road ahead.

This Urban Caravan is now seriously off-grid ready! โšก๏ธThe goal with this build was simple โ€” create a reliable, high-perf...
26/08/2026

This Urban Caravan is now seriously off-grid ready! โšก๏ธ

The goal with this build was simple โ€” create a reliable, high-performance off-grid system using the brands and components we trust and confidently recommend.

We retained the factory-fitted BMPro system, but purely as a fuse block and for water tank monitoring. All charging functions have been removed, with the Victron system now taking care of the serious work.

The new system includes:

๐Ÿ”‹ 2 x 345Ah PowerPaul Australia Pty Ltd Scout lithium batteries โ€” giving a massive 690Ah of usable battery capacity.

โšก Victron Orion XS 50A DC-DC Charger for fast and efficient charging while on the road.

๐Ÿ”Œ Victron MultiPlus II inverter/charger supplying power to all GPOs throughout the caravan, including the air conditioner, microwave and more. When connected to mains power, it can also charge the battery bank at up to 120A.

โ˜€๏ธ 1000W of Exotronic solar, managed by both a Victron 100/50 and 100/30 MPPT solar controller, ensuring maximum solar harvest.

๐Ÿ“Š Victron SmartShunt, Cerbo GX and Touch 70 display giving the owners complete visibility and control of their entire system.

And best of all, with the Victron GX ecosystem and remote monitoring, we can provide support and monitor the system remotely no matter where their travels take them. ๐ŸŒ

This isn't just about fitting the biggest battery bank possible. It's about designing a complete system where every component works together, is properly protected, easy to monitor and built for reliable off-grid travel.

We only fit products we trust, use and are confident putting our name behind.

And of course, no Coast Custom 12 Volt build is complete without a few extras! ๐Ÿ˜Ž
The owners also scored some Coast Custom 12 Volt T-shirts, stubby holders and stickers to take with them on their travels. ๐Ÿปโšก๏ธ

Wherever the road takes you, Coast Custom 12 Volt has your power sorted.

๐Ÿ“ Servicing Warwick, Toowoomba, Stanthorpe and surrounding areas.

๐Ÿ PROUD TO SUPPORT SPENNY G ๐ŸWeโ€™re stoked to be supporting Spenny G as he continues to chase his motocross goals.This yo...
24/08/2026

๐Ÿ PROUD TO SUPPORT SPENNY G ๐Ÿ

Weโ€™re stoked to be supporting Spenny G as he continues to chase his motocross goals.

This young bloke has some serious talent on two wheels, and itโ€™s awesome to be able to play a small part in supporting him as he develops his skills, gets more seat time and takes on the competition. ๐Ÿค˜

Motocross takes plenty of commitment, hard work and dedication โ€” and Spenny is putting in the effort both on and off the track.

Weโ€™re looking forward to following his progress and watching him continue to push the limits! ๐Ÿ†๐Ÿ”ฅ

Go get โ€™em Spenny!

โ€”
Coast Custom 12 Volt
Proudly supporting the next generation of riders.


Address

Warwick, QLD
4370

Opening Hours

Monday 7:30am - 5pm
Tuesday 7:30am - 5pm
Wednesday 7:30am - 5pm
Thursday 7:30am - 5pm
Friday 7:30am - 5pm

Telephone

+61421214111

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