The Redarc Smart Start® is a microprocessor-controlled battery isolator designed for use in multi-battery applications as a solenoid priority system, protecting the start battery from excessive discharge, whilst allowing the auxiliary battery to supply non-essential loads. The Redarc Smart Start® is designed primarily for use in 4WD and commercial vehicles and is available in four models; 12V DC or 24V DC incorporating 100A or 200A continuous ratings. The 200A models are designed for extremely heavy-duty operations. The Redarc Smart Start® is Australia's most trusted dual battery isolator and is used by 4WD clubs throughout Australia.