![]() This means the alternator output voltage is varied by the engines ECU to optimise fuel economy, by reducing the drag of the brushes on the commutator. If either battery is receiving a charge, e.g. The VSR Isolator model is impermeably encapsulated hence are water, dust and battery acid resistant, thus ensuring a long life and the best possible option in reliability and durability.Ī relatively new occurrence in modern 4WD vehicles is the use of Variable Output Alternators (VOA). The smart isolator is also Dual Sensing which senses the charge of both batteries. Wiring up the Intelligent Isolator is easy with only three simple connections necessary. A common problem with conventional marine or RV style isolators (aside from performance issues related to the obvious voltage drop and associated heat) is dealing with an internally regulated alternator. ![]() The VSR Isolator has an inbuilt surge protection device to protect your vehicle, its computer or any other radio or electronic equipment from these spikes. Dual rectifiers are commonly deployed in dual battery configurations where each battery may be discharged independent of the other. One of the by products of any isolator system is voltage spikes, caused by the switching of high currents. Also, connect the negative cable lug from the engine/ground and the negative accessory wire to either of the negative battery posts, and make sure all terminal nuts are tight. The VSR Isolator gives charging priority to the main battery at all times and only allows the charging of the auxiliary battery after the main battery is sufficiently recharged. In order for the dual-battery system to operate properly, you need a crossover cable between the negative terminals of the two batteries. These situations will usually result in a standard isolator assuming that it can charge both batteries but in reality will allow both batteries to discharge into each other or the vehicle’s electrical system. ![]() It cannot be ‘tricked’ into discharging a main battery into an auxiliary battery (or visa versa) in the event of a faulty alternator, faulty charging system, poor connection or just by leaving the ignition key switched on. The Isolator uses superior voltage sensing to determine charging rates. The 4WD Systems ‘VSR’ Isolator – Voltage Sensing Relay – due to its electronic voltage and load sensing design, overcomes the deficiencies that allow other isolators to discharge the main battery. All models are simple to install and are water resistant.Īn Isolator is required to enable the charging of a second ‘auxiliary battery’ but at the same time isolate it from the main battery system in order to protect the main battery from discharging into the same electrical circuit – usually the auxiliary battery is connected to a fridge, winch or caravan electrical system. ![]()
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