Samlex 160A Automatic Charge Isolator - 12V or 24V [ACR-160]160A Automatic Charge Isolator 12V or 24V The ACR 160 combines battery banks for charging and isolates them when charging has stopped. It provides priority for charging only the starter battery first and protects from excessive discharging of the starter battery. The Automatic Charge Isolator is also referred to as a battery separator, battery isolator or an automatic charging relay. Features: Microprocessor controlled, dual sensing Easy to install