Step by step Battery Isolator install (12V 140 Amp Dual Battery Isolator by KeyLine Chargers - Voltage Sensitive Relay (VSR) Pro Dual Battery Kit). This isolator kit connects the starter battery in your vehicle to a secondary “house” battery. The isolator tests for a proper charge level from the starter battery prior to charging the 2nd battery.
Instead of charging all the batteries equally, battery separators can determine which one needs it most and charge only that one. Hence, battery separators are superior to battery isolators in terms of efficiency and can charge batteries more quickly and precisely. Their main drawback is that they cost more than battery isolators.
Each battery can be charged and used separately from the others in the system when a battery isolator is used. Battery isolators are less effective than battery separators due to the voltage drop across the diodes or relays.
By understanding the battery isolator wiring diagram, you can confidently install and connect the isolator to your vehicle’s battery system. It will guide you through the process, allowing you to properly wire the primary and auxiliary batteries, as well as any additional connections required.
The main differences between 12 volt battery isolators and 12 volt battery separators is how they block energy transfer between batteries. An isolator uses diodes or relays to disconnect the batteries from each other, while a separator acts as a switch, regulating current in the vehicle’s electrical system.
Find the battery isolator in your vehicle’s wiring system. The battery isolator is usually a small box or device that is connected to the main battery and the auxiliary batteries. Take the positive wire from the main battery and connect it to the “BATT” or “MAIN” terminal on the battery isolator.