DC-DC Charger Sizing Guide for Campervans

Choose the right DC-DC charger for your campervan the first time.

This guide shows you how DC-DC charging works, how to size your charger properly, and how to choose the right cables, fuses, and layout for a safe install.

What this guide helps you do:

• Understand how DC-DC charging works
• Choose the right charger size for your battery and alternator
• Understand smart alternator compatibility
• Compare DC-DC chargers with split charge relays
• Size cables and fuses correctly

What’s inside:

• Step-by-step charger sizing method
• Victron and Renogy models explained
• Split charge relay vs DC-DC comparison
• Cable sizing and fuse placement guidance
• Full wiring diagram included
• Worked example and printable worksheet

Best for:

• Campervan builders choosing a DC-DC charger
• Anyone unsure about charger size, wiring, or fuse protection
• DIY campervan builds using AGM or LiFePO4 battery systems

Get your charger setup right the first time. Delivered instantly after purchase.