About Roam Wired

Roam Wired started from a simple frustration: when we built our first campervan, figuring out the electrical system was the hardest part. Spreadsheets, forum threads, and guesswork were the norm. We thought there had to be a better way.

So we built the tool we wished we had — a free calculator that takes your appliance list and spits out a properly sized battery, solar setup, wiring gauge, and fuse schedule. With a wiring diagram.

Along the way, we wrote the guides we wished existed too: clear, opinionated, safety-first, and focused on the UK & EU market where most van builds happen.

We believe everyone should have access to safe electrical design tools, regardless of budget. A badly wired van is a fire risk. If our calculator prevents even one fire, it was worth building.

We sustain the project through carefully chosen affiliate links. When you buy a product we recommend through our links, we earn a small commission at no extra cost to you. We only recommend products we genuinely believe in.

Most van electrical resources are US-centric. Different products, different suppliers, different standards. Roam Wired is built specifically for UK and EU van conversions — with products you can actually buy, prices in GBP, and suppliers that ship to your door.

Every calculation in our tool follows established safety practices: the 125% fuse rule, proper wire gauge tables for voltage drop, and recommended best practices for LiFePO4 and AGM battery systems. We err on the side of caution — always.

That said, we are a tool, not a certified electrician. For complex installations, we always recommend getting a qualified professional to check your work.

Some links on Roam Wired are affiliate links. This means if you click through and make a purchase, we may receive a small commission at no extra cost to you.

This helps us keep the tools and guides free for everyone. We only recommend products we have used ourselves or thoroughly researched. Our recommendations are never influenced by affiliate commission rates.