12V Power & Wiring

Dual battery systems, wiring guides, isolators, DC-DC chargers and 12V electronics for overlanding builds.

Ratchet crimping tool with ring terminals and assorted connectors for 12V wiring

How to Size Wire for a 12V System: AWG Guide for Overlanders

admin / May 8, 2026

Undersized wire is the #1 DIY wiring mistake. This guide gives you a practical AWG wire sizing chart, common overlanding circuits, copper vs CCA wire explained, and a step-by-step process to size every circuit in your 12V build correctly.

Dual battery setup in truck engine bay with DC-DC charger and ANL fuse block

12V Power & Wiring

Best Dual Battery Setup for Overlanding: Complete 12V Wiring Guide

admin / May 8, 2026

Learn how to build a reliable dual battery system for overlanding. Covers DC-DC chargers vs VSR isolators, AGM vs lithium batteries, wire sizing, fuse placement, and a full step-by-step wiring walkthrough.