The same is true in reverse: Should you leave the vehicle headlights on, the vehicle's main battery will not get drained. By using diodes to allow current to flow only in one direction, a battery isolator prevents a fully charges main battery from passing current to a partially charged auxiliary battery.Ĭurrent can flow from the alternator to both batteries but cannot flow from the vehicle battery to loads in the vehicle. The isolator's role is to allow the alternator to assist with charging the primary battery, while at the same time not allowing other loads in the charging system to drain the primary battery.
Regardless of how many batteries are available, the current flow from one battery to another will continue until all batteries in the electrical system reach the same charge level and may prevent the engine from starting.Ī battery isolator can eliminate the problem of battery drain all together. The current in the fully charged battery will drain to the less-charged battery, until both reach a common lower charge level, or even worse, discharge completely. This arrangement can present a problem when a fully charged battery is connected to a partially discharged or dead battery. Many 12-volt electrical systems rely on at least one battery to start the engine and another to power accessories. Generally built with diodes, isolators ensure that charge is evenly distributed between multiple batteries and the alternator. Despite seeming very similar, however, they function in different ways.īattery isolators are best seen as the distribution point of an automotive electrical system. Managing multiple batteries is where battery isolators and separators come into play. However, simply wiring extra batteries into a vehicle’s electrical system can allow auxiliary batteries to drain power from the main battery, inhibiting engine starting and other essential functions.
For these applications, having a multiple battery system is essential. The addition of electrical loads such as lights, entertainment systems, communications equipment and other accessories continue to draw power when the engine is off. However, this requires balancing the needs of the battery against those of the electrical system. The Smart Battery Isolator is available in 85A and 200A versions.Controlling parasitic loads (battery drain) and properly distributing electrical power is crucial to keeping vehicles working. Easy to install, the smart battery isolator also features an LED status indicator and operational start assist. No diode efficiency losses occur when using Cole Hersee’s smart battery isolator, and it also allows bi-directional charging from alternator or from other power chargers/converters. Because the smart battery isolator reduces charging system workload by not connecting to the auxiliary battery until the primary battery is charged to 13.2V, there is lower strain on expensive charging components, extending the product life. Additionally, Cole Hersee’s smart battery isolator is smaller, lighter and generates less heat than competitive products. Ideal for electrical applications, the smart battery isolator prevents loads on the auxiliary battery from draining the starting battery.The smart battery isolator provides a more flexible solution than traditional isolators, as it is not specific to an alternator type.
ELECTRONICS: Cole Hersee Co., a leading manufacturer of heavy-duty electrical, electronic, and digital products for the vehicle industry, introduces its new Smart Battery Isolator 4850.
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