Custom Campervan Electrical System
Design your own 12V campervan electrical system. Choose your 230V power — MultiPlus, inverter, or hook-up charger — plus your lithium battery, solar, and DC-DC charger. Custom wiring diagram and install guide included.
Choose Your 230V Power
Choose Your DC-DC Charger
Choose Your Battery
Pre-order · Stock Due July
All other components in your system will ship immediately. Your battery will be sent as soon as it's back in stock, so you can get started on your install right away.
See all of our battery options →Choose Your Solar
Mains hook up colour
Hook Up Cable
DC-DC Battery Cable 16mm/20mm
Or
4.9/5 • 100+ reviewsYour System Overview
100Ah Lithium
Battery
No solar selected
Solar
50A DC-DC
Alternator Charging
Up to 1000W
Off-Grid 230V
Up to 3000W
Campsite 230V
12-Way Fuse Box
12V System
Your Complete Campervan Electrical System
We've designed the system so you don't have to. Everything you need to install your campervan electrical system inside your campervan. This DIY kit includes all the parts required for installation including a detailed custom wiring diagram which includes all cable and fuse sizes for easy installation.
100Ah of lithium storage built for van life. Bluetooth built in so you can check your state of charge from your phone and backed by a 6-year warranty.
4 products
50A Victron DC-DC Charger System
Charges your leisure battery at a rate of 50A from your van's alternator while you drive, compatible with both traditional and smart alternators.
3 products (4 items)
Victron 1200VA Multiplus System
Off-grid it gives you 1000W from your leisure battery. Plug into a campsite hookup and it charges your battery while boosting your available power up to 3000W — all through the same sockets.
8 products (22 items)
Combi Fuse Holder System
Includes everything required to safely install system including - fuse holder, busbar, isolation switch, trunking, heat shirnk and fuses.
13 products (48 items)
BlueSea 12V Fuse Box System
Keeps all your 12V appliances neatly wired and protected in one place. Includes an isolation switch so you can disconnect everything in one go.
7 products (37 items)
This system is made up of 35 unique products (115 items total) — including 64 connectors, 27 m of cable and 5 fuses.
How Long Can You Stay Off-Grid?
Your off-grid times are based on the appliances you plan on using off-grid and the 100Ah battery, 50A DC-DC combination you've chosen. Select your appliances and see how long your selection will let you stay off-grid for.
Off-Grid Estimate
Select some appliances below to calculate off-grid times
Select the appliances you plan on using off-grid.
DC (12/24V)
AC (230V)
High Power AC (230V)
High-powered appliances will increase the cost of your system.
Needs > 1,000 W board
Needs > 1,000 W board
Needs > 1,000 W board
Needs > 1,000 W board
Custom Campervan Electrical System
£1,520.32
5-Year Complete System Warranty
Every component covered. We stand behind our systems because we build them to last.
Custom Wiring Diagram
Every order includes a professionally designed wiring diagram tailored to your exact system configuration and a comprehensive 50-page installation guide.
Unlimited Professional Support
We're not just here to sell you a system — we're here to ensure you've always got power on the road.
Design Your Own Campervan Electrical System
Every van build is different. The Custom system lets you pick every major component of your 12V campervan electrical system — your 230V power, your DC-DC charger, your lithium battery, and your solar — and we put it together as a complete kit with a custom wiring diagram and install guide included.
We've preselected a recommended starting build — a 1200VA MultiPlus, 50A DC-DC charger, and 100Ah lithium battery on the Victron Combi fuse holder platform. Swap or remove any part of it to fit your van.
Choose Your 230V Power
- Victron MultiPlus 500VA or 1200VA — 230V power off-grid and campsite hook-up charging
- Victron Phoenix 1200VA inverter — pure off-grid 230V power, no hook-up needed
- Victron Blue Smart 15A charger — campsite hook-up charging only
- Or skip 230V entirely for a pure 12V system — fridge, lights, USB, diesel heater
Choose Your Charging, Battery, and Solar
Pick a 30A or 50A DC-DC charger for alternator charging while you drive. Choose your lithium battery from 100Ah to 628Ah across Fogstar, Fogstar Drift Eco, and Foxygen. Add solar from 190W to 535W to stay topped up while parked.
Not Sure What You Need?
Our free campervan electrics builder designs the system for you — tell it where you travel and what you run, and it calculates your power needs, sizes every component, and shows how many days you can stay off-grid. You can buy the same kit directly from the builder.
Who Is This System For?
The Custom system is right for you if you:
- Know exactly which components you want in your van
- Want a pure 12V system without paying for an inverter you won't use
- Want to mix and match — big battery with small solar, or vice versa
- Are upgrading an existing install and want the core parts as a matched kit
- Want the confidence of a custom wiring diagram for the exact system you pick
Need More Power?
Everything here is built on the Combi fuse holder platform, which supports inverters up to 1200VA. If you want to run a kettle, induction hob, or air fryer off-grid, you need the 3000VA MultiPlus and Lynx busbar in the Nomad — our most powerful 12V system.
Why Vunked?
We don't just sell components — we design complete campervan electrical systems. Every kit ships with a custom wiring diagram specific to the battery, solar, and inverter combination you choose, plus a detailed installation guide.
Not sure which options are right for your build? Book a free consultation before you order — we'll help you spec the system to match your van, your appliances, and how you travel.
We've helped hundreds of self-builders get their vans on the road, backed by over 170 five-star reviews from customers who've installed our systems themselves.
Built With the Best Brands
All core components are from Victron Energy — the industry standard for marine and off-grid power systems. Trusted by professionals worldwide.
That means Bluetooth monitoring and app control via VictronConnect, reliable MPPT solar charge controllers, a huge community for support, long-term parts availability, and a 5-year warranty on Victron products.
How It Works
Step 1
Choose your system
Pick your battery and solar options or design your system from scratch using our builder tool.
Step 2
Order your complete kit
Everything arrives in one delivery with your custom wiring diagram.
Step 3
Install with confidence
Follow your step-by-step guide — every connection is mapped out.
Step 4
Get ongoing support
We're here before, during, and after your build.
Frequently Asked Questions
What Our Customers Say
Rated 4.9 with over 150+ 5 star reviewsGreat experience with the consultant…
Great experience with the consultant engineer understanding needs, requirements and skill levels involved in the project. Only suggestion I would make is that rank beginners may not understand connection point requirements of the various components - it would be useful to include on diagrams whether a lug is required or not, and which type/size end to use!
Great service from start to finish
Great service from start to finish, always available for advice and help, cannot recommend enough, i wouldnt trust my solar/electrics set up with anyone else!!
Sound advice and no pushy sales.
From initial enquiry to placing our order, over a period of 2 weeks Sam Barker was always ready to offer advice either over the phone or by email. Advice was based on what WE wanted to get from our electrical system. Never felt as though he was upselling, just simply advising the best solution. Checks elsewhere confirmed Sam's advice and design specification was spot on. Thanks Sam. If we ever do this again, I'll be back.
Great kit and product backup
Supply of the right kit for our application was made simple by competent, in person, service backup. Wiring diagrams were provided and our technical questions over the phone were given prompt attention and answered in layman's terms. The Vicron Smart Dc to DC charger supplied is an excellent piece of kit.
Brilliant service
Brilliant service
My new van build
I was unsure about what I needed for my new van conversion so I used the build feature and arranged a consultation. Sam asked some questions about the build and gave me some options and I went ahead and ordered. The kit was with me in a matter of days from vunked even tho I ordered right after new year! There was a bit of a mix up with my battery delivery from fogstar but Sam was on hand to have it sorted straight away. Can't fault the quality or the service I've recieved from vunked.
Great quick service and spot on wiring…
Great quick service and spot on wiring diagram that was easy to follow!
Vunked electric set up
Couldn't recommend vunked enough. I was very apprehensive about the van electrics but at the same time I wanted to give it a go. Sam from vunked was amazing to deal with, from our initial phone call to various e mails and calls during the install (im sure I did his head in) but he was always there to help. The wiring diagrams and instructions you receive are invaluable and easy to follow there is no way I would've been able to work that all out and install. It is very satisfying knowing everything is wired correctly and most importantly safe!!. Cheers Sam
It's the second time I've used Vunked…
It's the second time I've used Vunked as the service was great last time. Yet again, brilliant! Tried to save a bit by sourcing the main components from Renogy, and Vunked didn't have an issue with this. Top work guys!
Great expert advice
Unfortunately it turned out I couldn't buy the kit from Vunked due to geographical limitations, but Sam was anyway incredibly helpful and gave me great advice to design a suitable electrical system for my conversion, saving me a lot of time and headaches! Highly recommend!
Great experience with the consultant…
Great experience with the consultant engineer understanding needs, requirements and skill levels involved in the project. Only suggestion I would make is that rank beginners may not understand connection point requirements of the various components - it would be useful to include on diagrams whether a lug is required or not, and which type/size end to use!
Great service from start to finish
Great service from start to finish, always available for advice and help, cannot recommend enough, i wouldnt trust my solar/electrics set up with anyone else!!
Sound advice and no pushy sales.
From initial enquiry to placing our order, over a period of 2 weeks Sam Barker was always ready to offer advice either over the phone or by email. Advice was based on what WE wanted to get from our electrical system. Never felt as though he was upselling, just simply advising the best solution. Checks elsewhere confirmed Sam's advice and design specification was spot on. Thanks Sam. If we ever do this again, I'll be back.
Great kit and product backup
Supply of the right kit for our application was made simple by competent, in person, service backup. Wiring diagrams were provided and our technical questions over the phone were given prompt attention and answered in layman's terms. The Vicron Smart Dc to DC charger supplied is an excellent piece of kit.
Brilliant service
Brilliant service
My new van build
I was unsure about what I needed for my new van conversion so I used the build feature and arranged a consultation. Sam asked some questions about the build and gave me some options and I went ahead and ordered. The kit was with me in a matter of days from vunked even tho I ordered right after new year! There was a bit of a mix up with my battery delivery from fogstar but Sam was on hand to have it sorted straight away. Can't fault the quality or the service I've recieved from vunked.
Great quick service and spot on wiring…
Great quick service and spot on wiring diagram that was easy to follow!
Vunked electric set up
Couldn't recommend vunked enough. I was very apprehensive about the van electrics but at the same time I wanted to give it a go. Sam from vunked was amazing to deal with, from our initial phone call to various e mails and calls during the install (im sure I did his head in) but he was always there to help. The wiring diagrams and instructions you receive are invaluable and easy to follow there is no way I would've been able to work that all out and install. It is very satisfying knowing everything is wired correctly and most importantly safe!!. Cheers Sam
It's the second time I've used Vunked…
It's the second time I've used Vunked as the service was great last time. Yet again, brilliant! Tried to save a bit by sourcing the main components from Renogy, and Vunked didn't have an issue with this. Top work guys!
Great expert advice
Unfortunately it turned out I couldn't buy the kit from Vunked due to geographical limitations, but Sam was anyway incredibly helpful and gave me great advice to design a suitable electrical system for my conversion, saving me a lot of time and headaches! Highly recommend!
Vunked excellent…
Purchasing items was easy with expert advice on the website and phone consultation, product's turned up within two days great service, not done instruction yet so hopefully get help during installation if needed.
These guys are amazing
These guys are amazing! Endlessly helpful even after ordering everything and adding things to the system - offering more wiring diagrams to help build the system at no extra cost and even offering phone calls to discuss what I'm trying to achieve! Could not recommend enough for someone who is inexperienced in electrics and needs some help along the way. Extremely clear instruction manual and wiring diagrams - thanks a lot Vunked team!
Superb company
As a novice when it comes to van electrics Vunked proved to be my saviour when it came to ordering my electrical system. The website is full of fantastic information, answering all of my queries and helping me decide exactly what I needed and why. The ordering system was so easy to use and "behind the scenes" all the components, such as appropriate wires, fuses etc were automatically added and came in one delivery. It was accompanied by a wiring diagram and more detailed step by step guide which will prove invaluable. I had a small query (due to my ignorance) which I raised by email and Alan answered within minutes with the info required. Overall I'd have no hesitation in recommending Vunked and it's a comfort to know they are there to answer my queries. Well done!
From the phone call to order, perfect service
From the phone consultation to making the decision what we wanted was straightforward with a consultant listening to our wishes. We were offered several solutions, highlighting the differences between each of them. After our conversation the email gave us all that we ordered with another chance to make changes. No pressure, just a list of all the items where you could add or remove before finalizing your order. Order was confirmed and paid around lunch time, the whole order arrived the next day. Service from start to finish.
Great service and communication
Great service and communication. The website is great. I'm a complete novice and they were super helpful. Would recommend. FIVE STARS
Excellent communication top class and service
Excellent communication and service
Legends
Started designing my system with another company (nohma) and when I came to purchase they ended up disappearing and not returning any calls or messages for 2 weeks. Ended up getting fed up of waiting as I was on a tight schedule so I gave vunked a message. Got a message back the same day and vunked where extremely happy to replicate the system and even price match. Kit then got sent out with wiring diagrams and build instructions being sent the same day as purchase. Instructions are super easy to understand even for me who try to stay away from any electrical jobs. Everything was with me within 2 days. Unfortunately my solar panel had been damaged during transit but when I contacted vunked about what to do they offered either a replacement sent out free of charge or a 50% refund on the panel with a guarantee that if it doesn't work a new panel will be sent no matter how late I do it. Overall my only issue was that I didn't use vunked in the first place. These legends are amazing to work with and cannot recommend them enough.
Great company pleasure to deal with
Great company pleasure to deal with
Excellent customer support
Really easy order processing. Quick delivery. Excellent after sales communications.
Excellent service and delivery
Excellent service and delivery
Vunked excellent…
Purchasing items was easy with expert advice on the website and phone consultation, product's turned up within two days great service, not done instruction yet so hopefully get help during installation if needed.
These guys are amazing
These guys are amazing! Endlessly helpful even after ordering everything and adding things to the system - offering more wiring diagrams to help build the system at no extra cost and even offering phone calls to discuss what I'm trying to achieve! Could not recommend enough for someone who is inexperienced in electrics and needs some help along the way. Extremely clear instruction manual and wiring diagrams - thanks a lot Vunked team!
Superb company
As a novice when it comes to van electrics Vunked proved to be my saviour when it came to ordering my electrical system. The website is full of fantastic information, answering all of my queries and helping me decide exactly what I needed and why. The ordering system was so easy to use and "behind the scenes" all the components, such as appropriate wires, fuses etc were automatically added and came in one delivery. It was accompanied by a wiring diagram and more detailed step by step guide which will prove invaluable. I had a small query (due to my ignorance) which I raised by email and Alan answered within minutes with the info required. Overall I'd have no hesitation in recommending Vunked and it's a comfort to know they are there to answer my queries. Well done!
From the phone call to order, perfect service
From the phone consultation to making the decision what we wanted was straightforward with a consultant listening to our wishes. We were offered several solutions, highlighting the differences between each of them. After our conversation the email gave us all that we ordered with another chance to make changes. No pressure, just a list of all the items where you could add or remove before finalizing your order. Order was confirmed and paid around lunch time, the whole order arrived the next day. Service from start to finish.
Great service and communication
Great service and communication. The website is great. I'm a complete novice and they were super helpful. Would recommend. FIVE STARS
Excellent communication top class and service
Excellent communication and service
Legends
Started designing my system with another company (nohma) and when I came to purchase they ended up disappearing and not returning any calls or messages for 2 weeks. Ended up getting fed up of waiting as I was on a tight schedule so I gave vunked a message. Got a message back the same day and vunked where extremely happy to replicate the system and even price match. Kit then got sent out with wiring diagrams and build instructions being sent the same day as purchase. Instructions are super easy to understand even for me who try to stay away from any electrical jobs. Everything was with me within 2 days. Unfortunately my solar panel had been damaged during transit but when I contacted vunked about what to do they offered either a replacement sent out free of charge or a 50% refund on the panel with a guarantee that if it doesn't work a new panel will be sent no matter how late I do it. Overall my only issue was that I didn't use vunked in the first place. These legends are amazing to work with and cannot recommend them enough.
Great company pleasure to deal with
Great company pleasure to deal with
Excellent customer support
Really easy order processing. Quick delivery. Excellent after sales communications.
Excellent service and delivery
Excellent service and delivery
Learn more about your system
Background reading from our guides — explained for first-time builders.
Compare campervan electrical systems
How our pre-built systems compare side-by-side, and which one fits your build.
Calculate your off-grid power needs
Work out how much battery, solar, and charging you need before you buy a single component.
What does a campervan electrical system cost?
A breakdown of what goes into a complete campervan electrical system and what each piece costs.
