Battery Isolators & Relays

A Smart Solenoid or Voltage Sensitive Relay (VSR) is a device which will only connect your second battery to your vehicle's starting battery once the starting battery is fully charged. This means that only when your vehicle's main battery is fully charged the VSR will connect your second/auxillary battery so it can charge. The VSR will also disconnect the second battery/auxillary from your vehicle's starting battery to prevent the devices which are connected to the auxillary battery from ever draining your vehicle's starting battery meaning no more flat batteries. To learn more about Dual Battery Systems and Voltage Sensitive Relays watch the video on the right hand side of where you are reading now!