Your Local 12 Volt Specialist
Coast Custom 12 Volt is a dedicated 12V & 24V electrical business. Your go to specialist who knows off-grid power systems inside out.
One Specialist. Zero Compromises.
Hi, I’m Nathan, owner of Coast Custom 12 Volt.
Coast Custom 12 Volt started on the Sunshine Coast, combining my passion for camping, touring and building reliable electrical systems that perform when you need them most. When I’m not working, you’ll usually find me spending time with my wife and kids, heading away camping, working on my classic 1954 Ford Mainline or riding dirt bikes whenever I get the chance. Off-grid travel and outdoor adventures aren’t just part of the business, they’re a big part of our family’s lifestyle.
Because I use these systems myself, I understand how important reliable power is when you’re travelling. Whether it’s keeping the fridge running, charging batteries, powering Starlink or running a complete off-grid setup, the last thing you want is electrical issues cutting a trip short. With more than 15 years of experience in the electrical and automotive industries, I specialise in custom 12V and 24V systems for caravans, 4WDs, touring canopies, campers, motorhomes and work vehicles. Every installation is tailored to how you actually use your vehicle, not a one-size-fits-all package.
Now based in Warwick and servicing the Southern Downs, Toowoomba and surrounding regions, Coast Custom 12 Volt is built on honest advice, quality workmanship and friendly service. You’ll always deal directly with me, from the initial consultation through to the completed installation.
Whether your project is a simple battery upgrade, solar installation or a complete off-grid power system, I genuinely appreciate the opportunity to earn your business.
Trusted Brands
We’re an authorised supplier and installer for the brands that serious off-gridders trust.
Victron Energy
Industry-leading inverters, solar controllers & battery management
Bushman 12V Fridges
Authorised supplier & installer — premium Australian 12V & 24V refrigeration
PowerPaul Australia
Australian-made lithium batteries — built for touring, not just storage
AS/NZS 3001.2:2022
Every installation is fully compliant
AS/NZS 3001.2:2022 is the Australian standard for caravan and RV electrical systems, the same standard professional caravan manufacturers build to. Every system we install is engineered and certified to this standard.
What Our Customers Say
EXCELLENT Based on 72 reviews Posted on Google Glynis CraigTrustindex verifies that the original source of the review is Google. 10/10 for everything! Nathan drove to woop woop to install our bushman fridge, new battery system & fans. Last week in 42 degrees our fridge was lovely and cold and the fans were a godsend! We will use Coast Custom 12 Volt for anything we need in our offgrid set up !Posted on Google Shane DINEENTrustindex verifies that the original source of the review is Google. Nathan provided great advice and a quality install of an under floor auxiliary battery system into our Prado 250. Nathan listened to our requirements, provided good advice and designed a quality system to suit. We highly recommend Coast Custom 12 Volt.Posted on Google Grinners and GrumblesTrustindex verifies that the original source of the review is Google. Our experience with Coast Custom 12 Volt was excellent. They completed the solar panel installation and battery relocation with precision, and their customer service was top-notch. We would definitely recommend them to others and engage their services again in the future. Our wiring looked like a pile of spagetti until Nathan fixed it all upPosted on Google Jennifer KnustTrustindex verifies that the original source of the review is Google. Nathan installed 2 x 12 volts systems, one in our Motorhome and one in the trailer. Not only is the system fantastic and we never have to worry about our power, but he also fixed faults we had with our old system. The batteries have 7 years warranty, the upgrade to our panels keep the batteries topped up which really helps on cloudy and rainy days. We recommend Nathan to everyone, and he is so easy to deal with. Jenni & StevePosted on Google John MurdochTrustindex verifies that the original source of the review is Google. Nathan is a wonderful source of knowledge and Ideas. There is no pressure and helped Improve the efficiency of our stock caravans solar charging system. Work and components are 1st class. He is happy to do the smallest job at a sensible price. It's a relief to have a 5 star technician serviceing the Warwick and Toowoomba regions.Posted on Google peter petersTrustindex verifies that the original source of the review is Google. Right from the start from my first phone call to Nathan I was impressed with how he handled himself, from his first visit to look & listen to what I had envisaged (to see if it were possible) to completing 2 jobs for me. His communication skills are excellent, he turned up when he said he would & completed our jobs in a timely fashion. I found Nathan to be very knowledgeable, easy going using high end products & materials such as Victron and Australian made batteries from Powerpaul in our Bushtracker caravan. Nathan completely overhauled our caravan with a complete new system, amazed how he fitted everything I asked for so neat and tidy, replacing old existing solar panels, adding more solar panels, and the 12 volt equipment for us live totally off grid running the air conditioner, induction cooking etc. Nathan also worked on our car adding cables to the rear so we can plug in our Starlink. The whole system worked perfectly as we have just returned from a 4 month trip to remote WA without plugging into any mains power. I would highly recommend Coast Custom 12Volt and Nathan for his easy going flexible nature, his professionalism, communication skills, neatness of the job and he cleaned up after himself leaving no mess.Posted on Google Peter HebbeTrustindex verifies that the original source of the review is Google. Great communication and explanation of our solar system. Quality product and neat installation. Great value for money. I won't use anyone else for my solar needs 👍👍Posted on Google Derek HooperTrustindex verifies that the original source of the review is Google. Great work and great price. A tidy tradie what a bonus. Always good valuePosted on Google Michael JohnsTrustindex verifies that the original source of the review is Google. Nathan has done a couple of jobs for us so far and I would highly recommend him to anyone. Apart from being exceptional and knowledgeable at his craft, he is a genuine bloke who is happy to give advice and step you through what you need. I wouldn’t go to anyone else.
Mobile service across the Southern Downs · Warwick · Stanthorpe · Toowoomba · Inglewood · Killarney and surrounding regions
Ready to talk about your build?
Whether you’re planning a full off-grid fitout or just need a dual battery fitted, get in touch and we’ll work out exactly what you need.