12 Volt electrical systems for vans – the basics

DC distribution panel wiring

Here’s a basic overview of how a 12 Volt system works in vehicles. If everything that goes on under the hood of your car is a mystery to you, this article might help out.

It also covers the most important pieces of adding a house battery and charging system to your van conversion, and the things you need to consider when you wire up your fridge, fan, and electrical outlets.

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Why Mercedes’ Auxiliary battery package isn’t a good starting point for a conversion

Aux battery info close-up

Although lots of people specify the auxiliary battery (option E28) when they buy a van for conversion, or even try to retrofit the pieces that come in that option, it’s not clear that it was designed for the types of use it gets in adventure van conversions. It’s not clear that it’s actually any use for conversion vans.

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