The Vunked 48V campervan electrics builder walks you through a complete high-power system – battery bank, solar array, charging and inverter – and shows you exactly what you need, and why, with a live price as you go.

Why go 48V?

At the same power, a 48V system draws a quarter of the current of a 12V one. Lower current means thinner, cheaper cable, smaller voltage drop over long runs, and far more headroom for high-wattage 230V appliances. If your build includes air conditioning, an induction hob, or an inverter above 3kVA, 48V is usually the right foundation. For everything that still runs on 12V – lights, fridge, water pump, USB sockets – the system steps down through a dedicated 48-12V converter, so your accessories work exactly as they would in a 12V van.

What the builder does for you

• Calculates your total power consumption based on the appliances and devices you plan to run
• Sizes a 48V battery bank that can supply your largest loads and keep you off-grid for as long as you need
• Matches your solar array and MPPT charging to the bank, along with alternator charging while you drive
• Flags potential issues before they become problems on the road

The result is a personalised 48V 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 48V builder is designed to be approachable for first-time builders, while detailed enough for experienced converters planning serious off-grid power to find it genuinely useful.

Stop guessing. Start building with confidence.