The REDARC Smart Start® SBI is a microprocessor controlled, smart battery isolator. It is designed to be used in multi-battery applications as a solenoid priority system to protect the start battery from excessive discharge, while allowing the auxiliary battery to supply non-essential loads. The REDARC Smart Start® SBI is Australia’s most trusted dual battery isolator, used by 4WD clubs throughout Australia. It is available in four models; 12 or 24 volt DC incorporating 100 or 200 amp continuous ratings. The 200 amp models are designed for extremely heavy-duty operations, as found in industrial and mining situations.