Isolators are also used in vehicles with large, high-power car stereos and off road vehicles to accommodate high current loads such as a recovery winch. A battery isolator helps to ensure that the starting battery has sufficient power to start the engine and recharge the batteries if, for example, loads on the auxiliary battery (e.g., refrigerator or navigation lights) cause it to be drained, or if an auxiliary battery fails. 12V 140A Voltage Sensitive Split Charge Relay VSR for Camper Car Smart Battery Isolator Charge 2. Uses Д«attery isolators are commonly used on recreational vehicles, boats, utility vehicles, airplanes, and large trucks where one battery is dedicated to starting and running the engine and another battery or batteries run accessory loads (e.g., winches, radar, instruments, etc.). Romacci Voltage Sensitive Relay 140A Dual Battery Smart Isolator Relay Protection VSR Voltage Split for Boat Automotive Marine. The disadvantage to an isolator is added cost and complexity, and if a diode-type isolator is used (which is very common) there is additional voltage drop in the circuit between the charging source and the batteries. MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator. Round Panel Voltage Monitor Blue for Car Pickup RV Truck. In this case, a 4-post isolator can be used although they are about twice as expensive. WirthCo 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator : : Automotive. For some newer vehicles, a simple isolator creates problems with the electrical system. This is beneficial because a weak or dead battery will drain the charge from a strong battery if both are connected directly together. The Isolator is wired in between the alternator and the starter battery.

Smart battery isolator for pickup