The Vunked campervan electrics builder is a free, interactive campervan component builder designed to take the guesswork out of speccing your 12V system. Whether you're fitting out your first van or upgrading an existing build, it walks you through every element of your electrical setup and shows you exactly what you need – and why.

Built on real experience

This campervan electrics calculator didn't appear overnight. It's been developed off the back of countless builds, forum threads, wiring headaches, and hard-won knowledge from the van life and self-build community. The logic behind it reflects how real systems actually work – not just theory, but practical, road-tested decisions baked into every recommendation.

What the builder does for you

• Calculates your total power consumption based on the appliances and devices you plan to run
• Recommends the right battery capacity for your usage pattern
• Helps you size your solar, mains charging, and split charge inputs correctly
• Flags potential issues before they become problems on the road

The result is a personalised campervan electrics specification you can actually use – whether you're shopping for components, briefing an auto-electrician, or wiring it yourself.

No experience needed

You don't need an electrical background to use it. The campervan 12V builder is designed to be approachable for first-time builders, while detailed enough for experienced converters to find it genuinely useful.

Stop guessing. Start building with confidence.