A dual battery system is exactly what it sounds like. It is an additional battery placed in the vehicle with the intended purpose of powering your auxiliary accessories. Simple enough, right? Not so fast. Now that we have two batteries, we must find a way to charge them with one charging source, your alternator. Read on as I explain the many ways of accomplishing this.

Honda Talon Dual Battery Isolator Installation Guide

automatically separates your engine and auxiliary batteries and enabling you to run your camp lighting and 12v accessories for longer!

If you are running a second battery or thinking about installing one, the The Dual Battery Kit is the smart way to do it.

2020 Honda Pioneer 1000 - 3 Deluxe Dual Battery Installation

Do you need a True isolator for car dual battery setup?

An auxiliary  Battery System will isolate the second (auxiliary) battery from the starter battery. … You might only need something as simple as the Smart Solenoid or smart battery isolator. These allow you to charge your second battery while you drive, while also protecting your starter battery from excessive discharge.

How does auxiliary battery isolator work? Generally built with diodes, isolators ensure that charge is evenly distributed between multiple batteries and the alternator. … By using diodes to allow current to flow only in one direction, an auxiliary  battery isolator prevents a fully charges main battery from passing current to a partially charged auxiliary battery