FITS A WIDE VARIETY OF VEHICLES - This Dual Battery Isolator Kit with Printed Installation Instruction Manual Gives You the Power for Your Recreation Without Needing to Worry About Getting Home After.12V, 140A, 13.3V cut-in voltage, 12.8V Cut-out Voltage, Suitable for 12V 4WD, Marine, Truck, Caravan & Camping Applications.It's like having two separate power sources for each battery while only having one alternator! Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle.
VOLTAGE SENSITIVE RELAY - The Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems.