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Off-Grid Caravan Modifications For Your Next Adventure

"Off-grid" is the word driving more caravan upgrades than anything else right now. More Aussie travellers are chasing free camps, station stays and remote beaches over powered sites, and that shift is changing what people modify before they hit the road. It's no longer just about adding a solar panel and calling it done. A proper off-grid setup touches power, water, climate, sanitation, connectivity and even how your van handles the tracks that get you there.

Here's a rundown of the modifications our team gets asked about most, and what to consider for each one.

Power: The Foundation of Everything Else

Every other off-grid modification depends on having reliable power, so this is where to start.

DC-DC Charger. The voltage coming off your tow vehicle's alternator isn't enough to properly charge a lithium or AGM battery on its own. A dedicated DC-DC charger, such as the units on our Enerdrive range, fixes this by also allowing the charge to come through from your solar simultaneously and keeps your battery topping up properly on the drive between stops. 

Solar controller and panels. If you're running a decent-sized solar array, a dedicated MPPT solar controller means you're getting the maximum input from your panels rather than sharing capacity through a combined unit, so you're not leaving charge on the table.

Lithium battery. Lithium has become the standard for good reason. It's lighter than AGM, gives you close to full usable capacity rather than roughly half, charges faster, and lasts significantly longer. Our B-TEC lithium batteries are a popular choice and pair naturally with the charging gear above.

Connectivity: Starlink for Off-Grid Internet

Once your power system can handle it, Starlink is the modification most transforming how people travel off-grid. It means working remotely from a river bend in the Kimberly or staying in touch with family from a beach on Cape York (or not missing the footy team playing finals in September), without relying on patchy mobile signal.

The Starlink Mini is the standout choice for caravanners, drawing a fraction of the power with a standard dish, which means a caravan running a 100Ah lithium battery and a reasonable solar array can comfortably run it overnight. A few things make the difference between a setup that works and one that frustrates:

• Power it properly. Running Starlink through an inverter works, but you lose energy in the AC-DC conversion. A purpose-built 12V power supply like the Cowfish Cosmo Mini Premium Kit is the more efficient option, powering the Starlink Mini straight off your caravan's 12V system.
• Mount it securely. Corrugated roads, UV exposure and dust are hard on gear that isn't designed for it. A dedicated mount like the BBQARM 2-Part Starlink RV Pole keeps your dish stable without setting up a tripod at every stop. The other option is a roof mounting with a Gorilla Mount.

Water and Hot Water: Comfort Without Compromise

Extended off-grid stays live or die on water management. Bigger fresh water tanks and greywater capacity buy you more days between refills, while your hot water system needs to work without relying on mains power.

Diesel-fired hot water systems, like the Webasto EVO5 Hydronic, are a popular off-grid upgrade because they run off your existing diesel supply rather than gas or 240V, and some models can also feed cabin heating at the same time. It's a genuine two-birds-one-stone modification for anyone chasing colder, more remote spots. 

Gas-fired hot water systems, such as instantaneous models like the Truma Aquago, are the perfect way to utilise your existing gas plumbing onboard and save on water at the same time. Instantaneous units heat the water inline as it is being used, rather than heating a certain litre capacity holding tank and having to run on and off constantly to maintain the temperature within the units holding tank. Perfect way to have hot water when its needed and save on gas & water supply. 

Climate: Heating for Cooler Climates

When the temperatures outside drop below 5 degrees, most traditional roof-mounted air conditioner units will begin to struggle to warm internal spaces as the exterior air temperature becomes too cold. This is where diesel or gas air heaters really become wanted, as they are not affected by the external air temperatures. 

If your travels take you south in winter, or up into the highlands, a 12V diesel heater is one of the most requested off-grid comfort upgrades. Compact diesel air heaters run quietly, sip very little fuel, and draw modest power, so they won't undo the good work your solar and battery setup is doing. They're a common pairing with a diesel hot water system for vans built for genuine four-season touring.

Along with their diesel counterparts, 12v gas heaters are a very popular request for off-grid comfort during cooler months. They are compact, plumb directly into your existing gas lines, do not require regular servicing like diesel models, are quiet and a very efficient way to warm the inside of your van. 

Fridges: Keeping Food Cold Without the Power Drain

A  fridge is one of the more power-hungry appliances in most vans, so it's worth getting right. Our range of compressor fridges is built for efficient 12V operation, and for those wanting extra capacity for longer stints away from town, a second portable fridge or icebox is a simple way to add cold storage without redesigning your whole kitchen.

Sanitation: Toilets for Remote Travel

Cassette toilet systems remain the most practical off-grid solution for vans without full black water systems, letting you stay self-contained at free camps and station stays where there's no dump point nearby. We stock Thetford and Dometic cassette toilets and spare parts, so whether you're upgrading an aging unit or fitting one for the first time, there's a straightforward option to match your layout. Tip: Carrying a secondary cassette tank will keep you travelling for longer when away from dump-points.

Waterless and composting toilets have also become some of the most popular sanitation upgrades, and for good reason: they cut out cassette emptying altogether and use next to no water, which matter when every litre in your tank counts. 

• Clesana C1. A Swiss-made waterless toilet that seals waste is odour-proof liners rather than storing it in a cassette. It's compact, doesn't rely on chemicals, and has quickly become a favourite for vans wanting to stay off-grid longer without the emptying routine. 
• LooSeal. Works on the same sealing principle, locking odours away in individual liners after each use. It's a straightforward, low-maintenance option for travellers who want to leave cassette toilets behind for good.
• OGO Origin. A dedicated composting toilet that separates liquids and solids, using a coir peat additive to aid the composting process and keep things odour-free. It's a no-water solution, making it a strong fit for serious off-grid and remote touring setups.

All three remove the need to find a dump point, which is often the real limiting factor on how long you can stay away from civilisation.

Getting There: Chassis, Suspension and Jockey Wheels

Off-grid destinations usually mean rougher roads to reach them, and that's where chassis and suspension upgrades earn their keep. A well-matched suspension setup handles corrugations and uneven tracks with far less strain on your van and your gear, and a heavy-duty jockey wheel makes a real difference when you're setting up on soft or uneven ground. Suncoast is the only stockist on the Sunshine Coast carrying BOS jockey wheels in person, alongside our broader jacks and chassis equipment range.

If you are thinking of upgrading your suspension to travel further off-road, contact our knowledgeable Service Team 07 5443 1036 option 2.

Bringing It All Together

A typical off-grid-ready build we put together for customers touches on most of these areas over time:

• DC-DC charger and solar array feeding a dedicated MPPT controller.
• A B-TEC lithium battery sized to actual usage.
• Starlink Mini running through a Cowfish Cosmo Mini Premium Kit, mounted on a BBQARM pole or on the roof.
• Diesel / Gas hot water and heating for cooler climates and longer stays.
• An efficient compressor fridge, plus a cassette, waterless or composting toilet for full self-containment.
• Suspension and jockey wheel upgrades to handle the roads that get you there.

None of this needs to happen all at once. Most customers start with power, since everything else depends on it, then add modifications as their travel plans and budget allow. Others come in wanting a full of-grid fit-out before a big lap.

Ready to Plan Your Off-Grid Build?

Whether you're after one upgrade or a full off-grid package, our team can talk you through the right combination of gear for your van and travel style. Pop into the showroom at 33 Fishermans Road, Kuluin, browse the range online, or get in tough and we'll help you build a setup that keeps up with wherever you want to go.