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Marine Dual Battery Kit TrueAm Isolator System

marine battery isolator switch
marine battery isolator switch
  • Designed for 12V marine engine
  • Voltage-sensitive relay up to 140 Amp
  • Dual sensing VSR
  • The starting battery is set up as priority charging
  • Alternator Amp – 150
  • Manufactured by TrueAm Technology
  • Fully automatic marine dual battery kit
  • Guaranteed waterproof and heat resistant cables up to 130 degrees
  • A marine battery isolator switch is maintenance free technology
  • Free shipping and 1-day dispatch

This is an excellent marine battery isolator switch that allows you to add a second or third battery system in your boat. With its basic functionality that utilizes the most modern battery technology, this automatic dual battery switch keeps all batteries charged from the engine’s electrical parts while keeping the starting battery isolated. These features keep you out of trouble in the sea.


Using the same relay setup in our boat, this marine battery shut off switch keeps boat batteries and accessories charged, all the while isolating the boat’s starter battery system to keep it charged as well.

One major advantage of this TrueAm marine battery isolator technology is that you don’t need to reroute the fully automatic alternator wires. With this marine battery cutoff switch, you are in total control as it features a do-it-yourself approach.

Product composition

Marine battery disconnect switch
Marine battery disconnect switch

This marine battery isolator kit has voltage sensor and automatic switches, which is responsible for safe separation and charging of the starter system as well as the auxiliary batteries found in all solar and volt marine applications. When firing the engine, the starting battery is separated and the only one allowed to charge instead of the auxiliary batteries. Both batteries will be charged once the voltage reaches 13.3 volts, engaging the voltage sensitive relay (VSR).

Marine Dual Battery Kit TrueAm Isolator System


Once the engine stops and the battery charge falls below 12.8 bolts, the system’s VSR feature allows the separation of the starting and marine auxiliary system, turning off the indicator light and powering the boat auxiliary battery kit without the risk of draining all the power from the starting battery.


The VSR also features a Dual Sensing that monitors the charge of the two batteries. It is responsible for charging both batteries if only either one of them is receiving a charge.


This outstanding marine battery disconnect switch requires easy installation. It comes with all necessary components and wiring diagram for proper installation. With this marine battery switch, cutting into a factory wiring and voiding manufacturer warranty is not needed.

Get your marine battery disconnect switch from the official TrueAm retailer now!

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