Campervan Electrical Setup Explained (What Actually Works Full-Time)
When I built my campervan, the electrical system was one of the areas I cared about most.
Not because I wanted the flashiest setup possible, but because I knew power was something I never wanted to worry about while travelling full-time around Australia.
When you live in a van, your campervan electrical system becomes one of the foundations of your entire lifestyle. It powers your fridge, freezer, laptop, lights, water pump, diesel heater, camera gear, internet and everything else that makes life on the road comfortable.
For me, the goal was simple.
I wanted a campervan electrical setup that was reliable, high quality and powerful enough that I would run out of food or water long before I ran out of power.
After building the system, making mistakes, upgrading parts and living with it over thousands of kilometres, I’ve learnt a lot about what actually matters in a 12V campervan setup.
This isn’t a step-by-step wiring diagram.
It’s a real-world breakdown of my full-time van life electrical system, what I chose, what worked, what failed, and what I would do differently if I was building another van tomorrow.
A Quick Safety Note Before Building a Campervan Electrical System
Before getting into the details, it’s important to say this clearly.
Campervan electrical systems are not something to rush or guess your way through.
A 12V campervan setup might sound simple compared to household power, but poor wiring, undersized cables, incorrect fusing or bad installation can still create serious fire risks. If you are working with 230V/240V AC power, inverters, shore power or power points, that work should be handled by a licensed electrical professional. A WA Government case from 2024 specifically involved unlicensed 240V campervan wiring and highlighted the legal and safety risks of getting it wrong.
So use this article as experience-based guidance, not electrical instruction.
Do your research, use the correct standards, ask professionals, and get anything checked if you are unsure.
My Campervan Electrical Setup Overview
My campervan electrical setup was designed around full-time living, not weekend travel.
That changed everything.
I didn’t want a small system that worked only when the weather was perfect. I wanted something that could handle work, travel, bad weather, winter conditions and long periods away from powered campsites.
My current system includes:
Campervan Solar
Campervan Battery Setup
Off-Grid charging & power management
- Victron Orion-Tr Smart Isolated DC-DC Charger 12/12-30A
- Victron Lynx Distributor
- Victron MultiPlus-II 12V inverter/charger
- Victron Cerbo GX MK2
- Victron GX Touch 50 Display
- Victron GX Tank 140
12V distribution
Bluetooth monitoring & sensors
- Safiery tank level sensors for fresh & grey water (Don’t recommend – read why below)
- Mopeka Pro gas tank sensor
- Ruuvi Tags for internal, fridge cavity & outdoor temperature
Isolation switches
- Blue Sea Systems master solar switch
- Blue Sea Systems master DC-DC switch
- Blue Sea Systems master campervan switch
I chose Victron for most of the major components because the brand has an excellent reputation, strong support through forums and professionals, and a very complete monitoring ecosystem. The Orion-Tr Smart DC-DC charger, for example, is designed for dual-battery systems and includes Bluetooth monitoring and configuration through VictronConnect.
Was this the cheapest way to build a campervan electrical system?
Absolutely not.
But I wanted a high-end system that would push me to learn more about 12V power than I ever had before. You can read the entire budget breakdown of my DIY campervan here.
Why I Built a High-End Campervan Electrical Setup
The philosophy behind this build was reliability first.
I travel, work, edit photos and video, charge camera gear, use Starlink, run freezers and live out of the van full-time. Power is not just a luxury for me. It’s part of how I work and move around Australia. I wanted to know exactly what was happening inside the system at any point.
Through the Victron setup, I can monitor battery percentage, solar input, DC loads, AC loads, DC-DC charging, fresh water, grey water and even gas levels. It might sound over the top, but when you are remote or parked at a beautiful beach and trying to decide whether you can stay another few days, that information becomes genuinely useful.
If I know the weather is looking good, my water levels are fine and the battery is holding well, I can stay put. If the weather turns bad, I can make a decision early instead of waiting until I’m already low on power. That’s what I wanted from this campervan electrical system.
Not just power.
Confidence.
What My Campervan Electrical Setup Powers Day-to-Day
The biggest power users in my van are the Bushman 130L fridge/freezer and the Bushman 30L drawer freezer. Those run constantly.
On top of that, I also power my Starlink Mini, laptop, camera batteries, USB charging, LED lights, water pump, oven and hob ignition, diesel heater in winter, and usually the TV for an hour or two at dinner.
Most of my camera batteries and small electronics charge through 12V USB outlets, while my laptop charges through 240V. That matters because every time you convert power from 12V to 240V through an inverter, there are efficiency losses. So where possible, I prefer using 12V charging directly.
The Starlink Mini is mounted on the roof and has been surprisingly manageable from a power point of view. It still adds to the daily load, but compared to the fridge, freezer and laptop work, it isn’t the main thing I worry about. Find out here the one hidden feature you can use to save power with the starlink mini every day.
The real goal of my campervan electrical setup was to let me live normally.
I don’t want to think every night:
“Can I charge my laptop?”
“Can I work tomorrow?”
“Can I watch something tonight?”
For me, a good full-time van life electrical system should fade into the background.
It should just work.
Real-World Solar Performance Around Australia
Solar is easily the part of my system I’m most thankful for. If someone asked me for my number one piece of electrical advice when building a campervan, it would be this:
Put as much solar on the roof as you reasonably can.
Solar works quietly in the background, charges the battery for free, and doesn’t require you to drive or pay for powered campsites. In Australia, where you can spend huge amounts of time remote, that makes a massive difference.
Originally, I had 360W of solar. Later, I upgraded to 600W, and that change made the system feel completely different (especially in winter months).
The Victron MPPT 100/50 was part of the reason that upgrade was easy, because I had already planned ahead. Victron lists the 100/50 model as a 50A solar charger with nominal PV power of 700W on a 12V system, so my 600W campervan solar setup sits within that range.
That is exactly why future-proofing matters.
In summer, power is basically a non-issue for me. With long days and strong sun, I can see around 40A of solar coming in for hours at a time. During those conditions, I barely check the system.
Winter is completely different.
Down south in June, my 600W campervan solar setup might only peak around 320W to 350W for a short window during the day. Solar often doesn’t really start producing properly until around 10:30 or 11am, and by 3 or 4pm, the useful sun is mostly gone.
That’s why I think people should plan their campervan solar setup around winter, not summer.
If I had built the campervan solar setup only thinking about summer travel, I probably would have thought 360W of solar was enough. But in winter, that might only produce 150W to 170W during the best part of the day, and for my lifestyle, that would have been a struggle.
Plan for the worst conditions.
Summer will look after itself.
How Long I Can Last Off-Grid
Since upgrading to 600W of solar and changing to a reliable campervan battery setup, power has become something I think about less and less.
With minimal solar input, I know I can last around four days if I’m conservative.
That doesn’t mean doing nothing.
During a three-day storm where I had over 200mm of rain, I still managed to work, charge gear and watch movies. I just made smarter decisions. Instead of watching the TV, I used my laptop power more carefully and downloaded movies to watch on my phone.
I left that storm on day four with around 22% battery remaining. That’s the difference between having a system that is technically powerful and one you actually understand.
The more you live with your campervan electrical system, the more you learn what it can handle.
In winter, I still check the Victron display each morning to make sure I’m where I expect to be. I also have alarms set up through the Cerbo GX at 20% battery capacity, so if the system gets low, I know I need to make changes.
But most of the time, power no longer controls my travel decisions.
That was the goal from the start.
The Biggest Mistake I Made With My 12V Campervan Setup
The biggest mistake I made was choosing cheaper lithium batteries at the start.
Originally, I ran two 175Ah Renogy lithium batteries. On paper, the setup should have been fine. In reality, it wasn’t. (You can watch that major issue here)
After about six months of full-time travel, I was having issues almost every week. Then one morning on the Yorke Peninsula, I woke up ready to make a coffee, turned on the induction cooktop, and the batteries completely cut out.
They lost all voltage and never recovered.
Between my dad and I, we purchased five Renogy batteries around a similar time, and four out of the five died. That was enough for me.
After that, I changed to a custom-built Australian-made PowerPaul 345Ah lithium battery, and from the first week onwards, I stopped worrying about it.
It now sits in the cupboard in my campervan, and after 20,000km of full-time van life, it has been faultless.
That experience changed how I look at my campervan battery setup. Saving money on critical components can become expensive very quickly. Especially when your fridge, freezer, work setup and daily life rely on that system.
Why Future-Proofing Your Campervan Wiring Matters
If there is one thing I would strongly recommend before building your campervan electrical setup, it’s this:
Plan further ahead than you think you need to.
Electrical work happens in a strange order during a van build.
You need to run most of your cables early, before walls, floors and cabinetry are finished. But many components are not fully connected until much later.
That means if you realise halfway through the build that you need larger cable, extra wiring or a different cable route, it can be a nightmare to fix.
This is where future-proofing saved me.
When I first built the van, I oversized my solar cable and installed an MPPT that could handle more than my original campervan solar setup. At the time, the price difference was minimal. Months later, when I upgraded from 360W to 600W of solar, the system was ready for it.
I didn’t need to rip the van apart.
That was not luck.
That was planning.
I also oversized most of my 12V cable runs. I used online cable size calculators, (I used “wire my van” to create the entire van life electrical system for my van) and if they recommended a certain cable size, I generally went one size bigger. For me, that added peace of mind.
Undersized cable can create voltage drop, heat and serious safety risks. So rather than buying five different sizes of cable, I planned my loads, grouped similar circuits, and bulk-purchased fewer cable sizes that gave me room to grow.
Some circuits are definitely overkill.
But I would rather overbuild within reason than wish I had planned better once everything is buried behind walls and cabinetry.
The Victron System: What I Love and What I’d Question
I love the Victron system.
But I also think it’s important to be honest about whether everyone needs it.
The Cerbo GX and GX Touch display make the van feel high-end. They show me exactly what is happening across the system, including solar input, DC loads, AC loads, DC-DC charging, battery percentage and tank levels.
It is precise, clean and incredibly satisfying to use.
But do most people need that level of monitoring?
Probably not.
You can run Victron products with Bluetooth and monitor them through the VictronConnect app without spending the extra money on a Cerbo GX and screen. The SmartSolar and Orion-Tr products are designed to support app-based monitoring and configuration, which is already more than enough for many van builds.
I’ve used basic $99 shunts before that show battery percentage and whether power is coming in or going out.
And honestly, for many people, that is enough.
The Victron monitoring system gives me far more detail, but not everyone needs to know every part of the system in that much depth.
I’m glad I built it this way because it’s what I wanted.
But if I was trying to build a cheaper or more compact campervan electrical setup, this is one area I would think carefully about.
The Inverter/Charger Tradeoff
The Victron MultiPlus-II inverter/charger is one of the most impressive parts of my system.
It can charge the battery extremely quickly when connected to shore power, which is amazing when you actually need it. If I’m low on power and happen to be somewhere with access to mains power, I can put a huge amount (upto 120amps) of charge back into the campervan battery setup in a very short time.
It also has automatic transfer functionality, meaning when shore power is connected, the system can switch loads across rather than relying on the battery bank. Victron’s MultiPlus-II documentation describes features like PowerControl, PowerAssist and fast transfer to keep connected loads operating when AC input changes.
But here’s the honest part.
I barely use shore power.
In years of travelling, I’ve only really used the inverter/charger a handful of times, usually when power was already included somewhere or available for free.
The other issue is the inverter rating.
A 3000VA inverter is not the same as 3000W usable output. In my case, the usable wattage means my portable induction cooktop only works properly when I’m plugged into shore power or when strong solar is helping during the day.
It’s not a major problem, but it does mean I don’t use induction as much at night as I would like.
If I was building again, I would seriously think about whether I wanted the same inverter/charger setup, or whether I would prefer a true 3000W inverter and a separate charger.
The MultiPlus-II is excellent.
But excellent does not always mean necessary.
Components I Would Not Buy Again
The main components I would not buy again are the Safiery water tank sensors, part of my plumbing setup.
They were disappointing almost immediately.
On day three, I was testing the grey water sensor with only a tiny amount of sediment in the water. That sediment blocked the sensor, and from that point on, it gave incorrect readings.
When I contacted Safiery, I was basically told it was a common problem.
That was frustrating.
If I was doing it again, I would look at Bluetooth tank sensor options instead. The Mopeka Pro gas tank sensor I use has been excellent, gives accurate readings and has its own app, so I can still check levels even if I’m away from the Victron display. (The mopeka pro can be used for water tanks)
That’s the kind of simple, reliable setup I would lean toward more next time.
Not everything needs to be built into one big system.
Sometimes a standalone product does the job better.
What People Get Wrong About Campervan Electrical Systems
I don’t think people overcomplicate 12V electrical systems as much as they under-plan them.
That is the real issue.
A lot of people rush into the build, start putting walls and cabinetry in place, and only later realise they didn’t plan enough cable runs, didn’t allow for future upgrades, or didn’t fully understand how much power they would actually use.
That creates frustration later.
For me, the campervan electrical system should be planned before almost anything else.
Before I even purchased my Fiat Ducato, I was already researching and planning the 12V system. I spent around three months planning, ordering and setting up the electrical side of the build.
That might sound like a lot, but it saved me a heap of problems later.
The other thing people get wrong is assuming they can’t learn it.
I’m not saying everyone should wire their own van. If you are not confident, don’t understand the risks or feel out of your depth, get help. STY
There are excellent videos, blogs, forums and product manuals available now, and there are very smart people in the campervan and 12V community willing to help.
Just don’t rush it.
Because if this part goes wrong, it can go very wrong.
But with planning, research and patience, you can learn a lot.
Everything you need to know about the victron install for your campervan electrical system can be found in the video created by Explorist Life, and incredible youtuber, then use “Wire My Van” to find the perfect van life electrical system for your DIY Campervan build.
Would I Build the Same Campervan Electrical Setup Again?
Mostly, yes.
My campervan electrical setup works exactly how I wanted it to work.
It gives me reliable power, strong solar input, excellent monitoring, enough battery capacity, and the confidence to live and work from the van full-time.
That said, if I was building another van tomorrow, I would research more compact alternatives as well.
I still love Victron and would probably choose it again, but living in a van full-time teaches you how valuable space is. A more compact system from brands like Redarc, Enerdrive or similar might be worth comparing depending on the style of build.
I would also think carefully about the inverter/charger.
For how little I use shore power, I may not need such a large combined unit again. I might choose a different inverter setup and rely even more heavily on solar and DC-DC charging.
But the core philosophy would stay exactly the same.
I would still maximise solar.
I would still use a quality lithium battery.
I would still oversize important cables.
I would still future-proof the system.
And I would still build the campervan electrical system around full-time living, not occasional weekend use.
Final Thoughts on My Campervan Electrical Setup
Your campervan electrical setup should remove stress, not create it.
That’s the biggest thing I’ve learnt.
It doesn’t need to be the most expensive system. It doesn’t need to have the fanciest display. It doesn’t need to copy what someone else built online.
But it does need to suit the way you actually travel.
For me, that meant building a reliable, high-quality van life electrical system that could handle full-time work, travel and remote camping around Australia.
The PowerPaul battery, 600W campervan solar setup, Victron charging system and future-proofed wiring have given me exactly that.
I don’t worry about power anymore.
I don’t choose campsites based on whether I can plug in.
And I don’t feel limited by my electrical setup when I want to stay somewhere longer.
That is the real value.
Not the screen.
Not the brand.
Not the specs on paper.
The value is being able to live the way I want on the road without power holding me back.
