Written by H. Irwin Electrical | Published on June 2025
Powering a caravan or RV safely in South Australia starts with understanding the difference between low-voltage 12V systems and 240V mains power, and knowing which work legally requires a licensed electrician. This guide covers hookup options, solar setups, battery systems, compliance requirements, and the most common mistakes Adelaide travellers make before hitting the road.
Whether you are based in Glenelg, Marion, Henley Beach, or anywhere across Adelaide’s western and inner suburbs, H. Irwin Electrical can inspect, install, or certify your caravan’s electrical system before your next trip.
Understand the Two Electrical Systems in Your Caravan
Most caravans and RVs run two separate electrical systems. Understanding both is the first step to staying safe on the road and at camp.
The 12V DC system powers your lights, water pump, fans, and 12V appliances directly from your house battery or vehicle alternator. This system runs continuously whether or not you are connected to mains power.
The 240V AC system operates when you plug into a powered campsite or use a generator. It runs your air conditioner, microwave, and any standard household appliances. This system must be installed and maintained by a licensed electrician under Australian standards.
- 12V DC: lights, fans, water pump, USB charging, 12V fridge
- 240V AC: air conditioner, microwave, kettle, standard power points
- Both systems connect through a converter or inverter/charger unit
- Faults in either system can cause fires, electrocution, or appliance damage
- Only the 12V system can legally be worked on without a licence in South Australia
If you are unsure which system has a fault or whether your setup is compliant, H. Irwin Electrical can inspect your van and provide a written report before you travel.
Know the 240V Hookup Rules for South Australian Travellers
Connecting your caravan to a 240V powered site uses a standardised 15A or 10A inlet and lead. In South Australia, all 240V wiring inside a caravan must comply with AS/NZS 3001.2, the Australian standard for electrical installations in recreational vehicles.
This means that any fixed 240V work, including adding power points, replacing the main inlet, installing an air conditioner, or rewiring the caravan board, must be done by a licensed electrical contractor. A Certificate of Compliance (electrical work) must be issued after the work is completed.
| Work Type | Licence Required? | Certificate Issued? |
|---|---|---|
| Replace 240V power point | Yes | Yes |
| Install 240V air conditioner | Yes | Yes |
| Add new 12V light fitting | No | No |
| Install solar panels and 12V battery | No (for 12V only) | No |
| Connect solar inverter to 240V system | Yes | Yes |
| Replace caravan RCD or circuit breaker | Yes | Yes |
If you buy a second-hand caravan in Adelaide, it is worth having a licensed electrician inspect the 240V system before your first trip. Many older vans were modified without proper certification.
Choose the Right Solar and Battery Setup for South Australian Conditions
South Australia’s climate makes it one of the best states in the country for solar-powered camping. Adelaide receives an average of more than 2500 hours of sunshine per year, and regional areas like the Flinders Ranges and Eyre Peninsula get even more.
A well-sized solar and battery setup lets you free-camp for days without running a generator. Getting the sizing right depends on your daily power consumption and the time of year you travel.
| Typical Daily Use (12V) | Estimated Consumption | Recommended Solar |
|---|---|---|
| Lights, phone charging, water pump | 20-40Ah per day | 100-160W panel |
| Above plus 12V compressor fridge | 60-100Ah per day | 200-300W panels |
| Above plus laptop, TV, large fridge | 100-150Ah per day | 300-400W panels |
| Full-time living with 240V inverter use | 150-250Ah per day | 600W+ panels + lithium battery |
Lithium (LiFePO4) batteries are now the popular choice for serious travellers. They are lighter, discharge deeper, and last 2,000 to 5,000 cycles compared to around 300 to 500 cycles for AGM batteries. Expect to pay $800 to $2,000 for a quality 100Ah lithium battery.
If your solar setup connects to an inverter that feeds 240V power points inside the van, that inverter connection must be done by a licensed electrician to remain compliant with AS/NZS 3001.2.
Inspect These Common Electrical Faults Before You Travel
Caravan electrical fires are one of the leading causes of total losses on the road in Australia. Most fires start from wiring faults that could have been caught with a basic inspection before departure.
Adelaide travellers heading out over Easter, school holidays, or long weekends should make a habit of checking these items before every trip.
- Check that your 240V inlet and plug are clean, dry, and free from corrosion or burn marks.
- Test the RCD (safety switch) on your caravan board by pressing the test button. It must trip immediately.
- Inspect all 12V wiring you can see for cracked insulation, rodent damage, or loose connections.
- Make sure battery terminals are tight and free from corrosion. A loose terminal creates resistance and heat.
- Test all 12V lights, the water pump, and the fridge before leaving home, not at the campsite.
- Check that your 240V extension lead is rated for the load you will put on it. A 10A lead should not run a large air conditioner.
- Verify that your solar regulator or MPPT controller shows correct charging voltage (around 14.4V for AGM, 14.6V for lithium).
If you find burn marks, tripping circuits, or unexplained power loss, do not travel until a licensed electrician has inspected the system. H. Irwin Electrical provides caravan electrical inspections for customers across Adelaide, including Plympton, Glandore, Kurralta Park, and Somerton Park.
Understand Generator Safety Rules for Camping in South Australia
Generators are a practical backup when solar is not enough, but they come with serious safety requirements. Carbon monoxide poisoning is a real risk when generators are used improperly in enclosed or semi-enclosed spaces.
South Australian national parks and many campgrounds have restrictions on generator use. Always check the rules for your specific campsite before you go. Most sites restrict generator hours to between 8am and 8pm or similar windows.
- Always run generators at least 2 metres away from your caravan, tent, or annexe.
- Never run a generator inside an annexe, enclosed awning, or garage space.
- Use a properly rated extension lead to connect the generator to your van’s 240V inlet.
- Install a carbon monoxide detector inside your caravan if you travel with a generator regularly.
- Check your generator’s oil and air filter before each trip season.
- Do not overload your generator. Check its rated continuous wattage, not peak wattage.
A 2,000W inverter generator will run a small air conditioner, a laptop, and phone charging simultaneously. A standard 800W unit will handle lights and a small fridge but not an air conditioner.
Plan Your Electrical Upgrades Before the Busy Travel Season
Adelaide’s caravan and RV season picks up from around September through to April, with the Christmas and Easter periods booked out months in advance. Getting electrical upgrades done before the rush means you will not be waiting weeks for a qualified electrician.
Popular upgrades that H. Irwin Electrical handles for Adelaide travellers include solar and lithium battery installations, 240V circuit upgrades, additional power point installation, air conditioner wiring, and full pre-purchase electrical inspections.
Customers in Unley, Hyde Park, North Adelaide, Prospect, and Beverley often contact H. Irwin Electrical during winter to get their vans ready for the warmer travelling months. Booking early means you get the work done at your convenience rather than in a rush the week before departure.
If you are buying a caravan from a private seller in Adelaide, a pre-purchase electrical inspection can reveal hidden faults that the seller may not even know about. This inspection typically costs $150 to $300 and can save you thousands in repairs or insurance headaches down the track.
FAQs on Caravan and RV Electrical Safety in South Australia
Do I need a licensed electrician to install solar panels on my caravan in South Australia?
For a standard 12V solar setup connecting panels to a battery via a solar regulator, no licence is required in South Australia. However, if the solar system connects to an inverter that powers 240V outlets inside the caravan, that connection must be completed by a licensed electrician and a Certificate of Compliance must be issued.
What is the correct RCD requirement for a caravan in Australia?
Under AS/NZS 3001.2, all 240V circuits in a caravan must be protected by a residual current device (RCD) with a trip current of no more than 30mA. You should test your RCD before every trip by pressing the test button on your caravan’s switchboard. If it does not trip, have it replaced by a licensed electrician immediately.
Can I use a regular household extension lead to connect my caravan to a powered site?
No. You should use a purpose-built caravan extension lead rated for outdoor use, with weatherproof connectors and the correct amperage rating for your load. Household extension leads are not rated for continuous outdoor use and can overheat, especially when running air conditioning loads. Look for leads rated to AS/NZS 3123 with 15A connectors.
How much does it cost to get a caravan electrical inspection in Adelaide?
A basic caravan electrical inspection in Adelaide typically costs between $150 and $300 depending on the size of the van and the scope of work. This inspection covers the 240V switchboard, wiring condition, RCD function, inlet and outlet integrity, and general compliance with AS/NZS 3001.2. Contact H. Irwin Electrical on 0432 270 757 for a specific quote.
Is it legal to modify the 240V wiring in my own caravan in South Australia?
No. In South Australia, any work on a 240V electrical system, including in a caravan or RV, must be carried out by a licensed electrical contractor. Unlicensed electrical work is illegal and voids your insurance. If a fire or fault occurs from unlicensed work, you may be personally liable for any resulting damage or injury.
What size solar system do I need to run a caravan air conditioner?
Running a 240V reverse-cycle air conditioner from solar requires a large inverter (minimum 2,000W), a substantial lithium battery bank (200Ah to 400Ah), and at least 600W to 1,000W of solar panels. This is a significant investment and the 240V connections must be done by a licensed electrician. Most travellers find that a well-insulated van with a 12V roof fan and shade management is more practical for South Australian summer travel.
Wrap Up and Next Steps
Powering your caravan or RV safely in South Australia comes down to understanding your systems, keeping your 240V work compliant, and doing a proper inspection before every trip. A small investment in electrical safety protects your van, your family, and your insurance coverage.
H. Irwin Electrical is based in Glenelg and Novar Gardens and services caravan owners across Adelaide including Glenelg North, West Beach, Richmond, Fulham, Henley Beach, and surrounding suburbs. Call us on 0432 270 757 to book a caravan electrical inspection or discuss an upgrade before your next adventure.
