Installation Guide

Connecting to Main (Start) Battery
• Connect the Battery Input terminals of your DC2DC+ to your vehicles main/start battery. A
70A midi fuse located as close as possible to the main/start battery is required. Refer below
cable sizing chart.
Note: Refer to DC2DC manual for information on wiring for vehicles with smart alternators.
Connection to Auxiliary Battery
• Connect your auxiliary (main house battery) battery negative cable, which is to be a minimum
of 50mm2 (0AWG), to the Simarine shunt stud using a 10mm ring terminal, the one with no
cable connected.
Vehicle Positive
Connect main negative cable from
auxiliary battery here.
Vehicle Negative
INSTALLATION GUIDE
DC2DC Connection
Inputs
Require Length & Battery Cable Size
DC2DC set to
50A Output
From Start Battery
2 Meters to 5 Meters (2)
6-16mm² @ 12vdc 16-35mm² @ 12vdc
/ 4-8mm² @ 24vdc
Up to 10 Meters (2) Greater than 10 Meters
Not Recommended
/ 8-16mm² @ 24vdc