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#BATTERY ISOLATOR RELAY DRIVER#
The resultant flickering of lights would alert the driver of the system overload.
![battery isolator relay battery isolator relay](https://www.picclickimg.com/d/l400/pict/232687437243_/12V-300A-Auto-Main-Auxiliary-Dual-Battery.jpg)
When the chassis voltage goes above 13.3 volts again, the relay will again close in about two seconds to retry and charge the coach battery. This might happen when the alternator is not able to supply sufficient current to all of the loads. If the voltage should fall below 12 volts for more than two seconds while the ignition is on, the relay will drop out to feed all the alternators available output to the chassis battery to keep the engine running. When the ignition switch is turned off, the relay will open immediately. Shop and Buy Projecta Dual Battery Vsr Voltage Relay Isolator System & Trailer Caravan Kit at Australias ultimate online store for all tools. When this voltage goes above 13.3 volts for approximately 12 seconds, as happens when the engine is running normally (normal alternator output voltage is approximately 14.4 volts), it will close the isolator relay providing charging current to the coach battery. The unit operates as an isolator by sensing the level of voltage on the chassis 12 volt system. It also allows the use of self-exciting alternators. It provides a delay to allow the engine to briefly "warm up" and to recharge the main battery before placing the heavy load of a discharged auxiliary battery on the alternator. The 200 amp version is not a continuous duty unit and requires an Isolator diesel controller to prevent it from over-heating. It is installed between the two batteries, connecting them together for charging. The Battery Isolator Relay Delay/E is a reliable approach to charging multiple batteries on a vehicle. The Big Boy Battery Isolator Relay 77-90006-120 provides a simple, reliable and cost effective means of isolating two battery systems. Intellitec Battery Isolator Relay Delay 00-00629-120