Free UK DeliveryCustom Wiring Diagram With Every Order1,000+ Systems Sold

Free Campervan Wiring Diagrams

Design your campervan electrical system online for free and see exactly how it all wires together. Browse free 12V, solar, DC-DC and inverter wiring diagrams and guides — and get a custom wiring diagram with every order. Built for UK van conversions.

Customer with dog in van
Customer in their van
Customer van build
Customer wiring diagram
1,000+ Vans Powered
Rated Excellent on Trustpilot4.9 stars · 150+ reviews
Free delivery
Free design consultations with an expert
Custom wiring diagram & install guide with every order

Complete Systems, Fully Wired

Every system is designed to wire together cleanly and ships with a custom wiring diagram. Pick a starting point, configure it to your van, and see it come together.

Pre-Wired Boards

Boards pre-built by professionals, ready for installation.

These are starting points — the builder tool lets you adjust everything to match your exact setup. Or browse the full shop.

Trusted By 1000's Of Vanlifers & DIY Builders

Real Reviews. Real Builds. Real Adventures.

Electrics for all vehicles
Designed by experts
Installation ready
Ongoing support
Takes under 5 minutes

From Diagram to Doorstep

Choose your system
Customise your setup
Order with confidence

Pick a starting point above, or start from scratch in the builder tool. It takes under 5 minutes.

The tool checks compatibility, calculates off-grid time, and updates the price as you go.

Everything arrives together with a custom wiring diagram. Or book a call if you want to talk it through first.

Easy Installation

Personalised Wiring Diagram

Install your system with ease with a free personalised wiring diagram showing all wiring and fuse sizes.

Example personalised wiring diagram showing solar, battery, inverter and DC-DC charger connections

Installation Guide

Our illustrated installation guide walks through each component, providing detailed instructions on how to install your system.

Example installation guide pages showing step-by-step instructions for battery, solar and inverter installation

Our Promises

5-Year Complete System Warranty

Every component covered. We stand behind our systems because we build them to last.

30-Day Money Back Guarantee

Changed your mind? Return your order within 30 days for a full refund. No questions asked.

Custom Wiring Diagram & Install Guide

Every order includes a professionally designed wiring diagram tailored to your exact system and a comprehensive 50-page installation guide.

Unlimited Professional Support

We're not just here to sell you a system — we're here before, during, and after your install to make sure you've always got power on the road.

Free UK Delivery

Everything arrives together, ready to install. No chasing multiple deliveries from different suppliers.

Victron Official Dealer

Genuine components sourced directly from Victron's distribution network, with full manufacturer warranty.

What Our Customers Say

Rated Excellent on TrustpilotRated 4.9 with over 150+ 5 star reviews

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!

Brittany Hook
3 weeks ago

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!!

Carl Longden
1 week ago

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.

Chris Parkin
1 week ago

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.

Gordon McKillop
1 week ago

Brilliant service

Brilliant service

Stuart gardiner
3 weeks ago

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.

Dale Leadingham
2 months ago

Great quick service and spot on wiring…

Great quick service and spot on wiring diagram that was easy to follow!

ian potts
2 months ago

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

Mark Graham
1 month ago

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!

D Fan
1 month ago

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!

Andrea
1 month ago

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!

Brittany Hook
3 weeks ago

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!!

Carl Longden
1 week ago

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.

Chris Parkin
1 week ago

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.

Gordon McKillop
1 week ago

Brilliant service

Brilliant service

Stuart gardiner
3 weeks ago

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.

Dale Leadingham
2 months ago

Great quick service and spot on wiring…

Great quick service and spot on wiring diagram that was easy to follow!

ian potts
2 months ago

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

Mark Graham
1 month ago

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!

D Fan
1 month ago

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!

Andrea
1 month ago

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.

Mr Nick Betts
2 months ago

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!

James Tilyard
2 months ago

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!

Mr Donald Callum
2 months ago

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.

Erwin Oosterhoorn
3 months ago

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

Emma
2 months ago

Excellent communication top class and service

Excellent communication and service

Daniel Garfoot
2 months ago

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.

Josh Scott
3 months ago

Great company pleasure to deal with

Great company pleasure to deal with

Nigel Flatt
3 months ago

Excellent customer support

Really easy order processing. Quick delivery. Excellent after sales communications.

CE
3 months ago

Excellent service and delivery

Excellent service and delivery

Del Sturrock
3 months ago

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.

Mr Nick Betts
2 months ago

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!

James Tilyard
2 months ago

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!

Mr Donald Callum
2 months ago

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.

Erwin Oosterhoorn
3 months ago

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

Emma
2 months ago

Excellent communication top class and service

Excellent communication and service

Daniel Garfoot
2 months ago

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.

Josh Scott
3 months ago

Great company pleasure to deal with

Great company pleasure to deal with

Nigel Flatt
3 months ago

Excellent customer support

Really easy order processing. Quick delivery. Excellent after sales communications.

CE
3 months ago

Excellent service and delivery

Excellent service and delivery

Del Sturrock
3 months ago
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Common Questions About Free Campervan Wiring Diagrams Kits

A campervan wiring diagram is a map of your electrical system. It shows every component — battery, busbar, fuses, solar, DC-DC charger, inverter and each 12V load — and exactly how current flows between them. At its heart, a 12V campervan is one large parallel circuit: power leaves the battery, passes through a master switch and fused distribution, then branches out to each appliance. A clear diagram is what makes an install safe, tidy and easy to fault-find later.

Yes. Every system we ship comes with a custom wiring diagram drawn for your exact components, plus a comprehensive 50-page installation guide. You're never left guessing how it goes together — the diagram shows every cable, fuse rating and connection point for your specific build.

A complete 12V diagram shows the leisure battery, a master or isolator switch, fused distribution (a fuse box or a busbar with fuse holders), and every load on its own protected branch — lights, roof fan, water pump, fridge, USB and a battery monitor. It should also show your charging inputs: solar through an MPPT controller and, if you charge while driving, a DC-DC charger from the alternator. Cable is sized to each load — roughly 6mm² for a fridge, 2mm² for lights.

They all meet at your central busbar. The leisure battery connects to the busbar through a master switch and main fuse. Solar panels feed an MPPT charge controller, which then connects to the battery — never wire panels straight to the battery. A DC-DC charger takes power from the starter battery and alternator and charges the leisure battery with the correct profile. Every one of these connections is individually fused, close to its power source.

Yes. Our online configurator lets you build your system component by component — battery, solar, charging and inverter. It checks compatibility, sizes your fuses and cable, calculates your off-grid time, and produces a wiring diagram for your exact setup. It's free to use, with no obligation to buy.

Absolutely — a wiring diagram is the single most useful thing you can have during a self-install. It tells you what connects where, what fuse and cable each run needs, and the safe order to build things up in. Most of our customers install their own systems using our custom diagram and install guide, with our team on hand if they get stuck.

Yes. Most campervans run a 12V system, but higher-power builds — induction cooking, air conditioning, Starlink for remote work — often move to 24V or 48V. The wiring logic is the same, but cable and fuse sizing change. If you're planning a high-power build, book a free call and we'll design the right system and diagram with you.

As close to the power source as possible. A fuse protects the cable that runs from it, so it must sit right at the battery or busbar end of each run — that way a short anywhere along the cable blows the fuse before the cable can overheat.

It depends on the current the circuit carries and how long the run is. As a rough guide, a fridge wants around 6mm², lights around 2mm², and inverter and battery-to-busbar runs need heavy cable sized to the load. Longer runs need thicker cable to keep voltage drop under about 3%.

Even simple builds benefit from one. A busbar gives you a single, tidy positive and negative connection point instead of stacking ring terminals on the battery. For inverters over about 1600VA, a Lynx-style distributor that combines busbar and fusing is the cleaner choice.

No. Solar panels must go through a charge controller — an MPPT in any modern build. Wiring panels directly to the battery risks overcharging and damage, and you lose the efficiency an MPPT provides.

Yes. Lithium (LiFePO4) batteries should never be charged directly from the alternator. A DC-DC charger delivers the correct lithium charge profile and protects both the battery and a modern smart alternator from problems.

The 12V DC side of an inverter is well within reach for a confident self-builder. The 230V AC side is different — it must follow BS 7671, use an RCD and consumer unit, and 230V can be lethal. If you are not certain, have that side inspected and signed off by a qualified electrician.

Book a Free Consultation

Talk to our team and we'll spec your system with you. No pressure, no obligation.