![]() ![]() A solenoid battery isolator does not have as much current degradation as a diode isolator and is more efficient. Additional relays transmit the charging current from the alternator to the idle batteries. One of the relays receives the electrical current from the battery, while the other relay (known as the central relay) monitors the power levels of the idle batteries. ![]() If the battery voltage drops below 12.1V a voltage sensitive timer is triggered within the ECU. A solenoid isolator uses several electrical relays to control the flow of electrical current. Battery Guard 2000 constantly monitors the available battery power when the engine or charging system is off. ![]() A diode isolator is not as complex as a solenoid isolator, is easier to maintain and repair and generally lasts longer. A diode isolator uses two high-current diodes to direct the flow of current from the battery to the battery isolator. There are two main types of battery isolators: the diode isolator and the solenoid isolator. Intellitecs Bi-Directional Isolator Relay Delay offers a new approach to charging batteries in an RV application. The idle batteries are charged by the alternator, and the battery isolator can switch power sources if the battery in use suddenly fails. The battery isolator uses sensors to determine the number of batteries it is connected to and to draw power from the strongest battery. The battery isolator is attached to the vehicle's alternator, which is the device responsible for providing the vehicle with electrical power and for charging the vehicle's battery. A simple setup is one in which a vehicle contains two batteries, both of which are attached to the isolator. In addition, a battery isolator ensures that a vehicle's electrical system does not pull power from multiple batteries at the same time, which would rapidly drain all the batteries and cause the electrical system to fail. Battery isolators are used in large trucks, RV's, boats, utility vehicles and other vehicles that require multiple batteries and backup sources of power.Ī battery isolator separates multiple batteries from one another to ensure that a vehicle has access to a backup power source. A battery isolator typically is used in situations where multiple batteries are required, and its primary purpose is to ensure that the failure of a single battery will not incapacitate an entire electrical system. Some sort of battery isolator is required if the alternator is going to be used to charge more than one battery.Ī battery isolator is a one-way electrical device that allows an electrical current to flow in one direction but not the other. These batteries are typically deep cycle batteries that prefer to be partially discharged and recharged on a regular basis. The batteries used to provide power operation of DC and AC appliances in a work truck, recreational vehicle, or boat are called the house batteries. If this battery is drained down because the car won't start or the lights were left on, the battery life decreases rapidly and will probably remain dead the next time it is drained down. Automotive type batteries do not like to be discharged to a low level. This battery relies on the alternator to keep it charged up for the next cranking cycle. The vehicle (chassis) battery is typically an automotive type of battery that provides high cranking amps to start the engine. Work trucks, boats, recreational vehicles, long haul trucks and fleet vehicles all have a battery isolator if the alternator is being used to charge both the house and vehicle batteries. When ignition is off, the relay opens immediately, should the voltage on the main battery drop below 12 / 24 volts for 2 seconds whilst the engine is running, the relay will drop out, prioritising charging current to the main battery.What type of battery isolator should be installed? The IRD senses the voltage on the main battery of a 12 / 24v system, when this voltage goes above 13.3 / 26.6 volts for 12 seconds, the IRD ECU will close the isolator relay, providing charging current to the aux battery. The ECU operates in conjunction with the Intellitec Silver Can relay, there are just three connections to be made, one from an ignition switched source,an earth, the last being the relay coil. The IRD ECU is fully potted in a plastic enclosure for mounting in the engine compartment. This allows the use of self exciting alternators and lets the engine briefly warm up prior to placing the load of a heavily discharged battery on the alternator. Unlike diode isolators, the IRD provides the engine driven alternator with the opportunity to begin charging the main battery before connecting the auxiliary battery. Intellitec’s Isolator Relay Delay (IRD) offers a low cost, reliable approach to charging multiple batteries. ![]()
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