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However, I have not been able to find any manual for this specific Guest model, nor have I been able to find any reference to someone wiring up the isolator in this fashion. I intend to buy a replacement part with a similar capacity. My assumption is that, after 14 years, the battery isolator has failed. When running the motor (and I have turned off the solar charger/MPPT Controller) at about 2000rpm, on the voltmeter I am getting a reading of 14.28VDC at pin 1 but only 12.38VDC at pin labelled A. There is nothing attached to the third pin numbered 2. The house cable goes to the pin labelled A. On top of the battery isolator, the cable from the starter motor/starter battery goes to the pin numbered 1. (There are also cables running to the generator, irrelevant for current purposes.) On the other side of that switch the + goes to the starter battery itself and it is from that side of the switch that a cable goes to the battery isolator. Rather, the cable from the alternator goes to the starter motor then it runs to the starter battery on/off switch. There is no direct cable from the alternator to the battery isolator. The battery isolator has 3 pins on the top, ordered 1, A and 2. It is model 2430, apparently no longer made. I have located the Guest battery isolator behind the main 12V circuit panel. My issue is that, when running the motor, the house batteries are not charging. ![]() I have 1 AGM starter battery (which starts both the motor and the generator) and 3 x AGM house batteries. With this marine battery switch, cutting into a factory wiring and voiding manufacturer warranty is not needed.Bogart is a 2007 Hunter 45CC equipped with generator. It comes with all necessary components and wiring diagram for proper installation. This outstanding marine battery disconnect switch requires easy installation. It is responsible for charging both batteries if only either one of them is receiving a charge. The VSR also features a Dual Sensing that monitors the charge of the two batteries. 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. Both batteries will be charged once the voltage reaches 13.3 volts, engaging the voltage sensitive relay (VSR). When firing the engine, the starting battery is separated and the only one allowed to charge instead of the auxiliary batteries. 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. Product composition Marine battery disconnect switch With this marine battery cutoff switch, you are in total control as it features a do-it-yourself approach. One major advantage of this TrueAm marine battery isolator technology is that you don’t need to reroute the fully automatic alternator wires. 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. These features keep you out of trouble in the sea. 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. This is an excellent marine battery isolator switch that allows you to add a second or third battery system in your boat. #Marine dual engine battery isolator relay wiring free#
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