
The Redarc SmartStart® SBI is a microprocessor-controlled Dual 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 SmartStart® SBI 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 SmartStart® SBI is Australia’s most trusted Dual Battery Isolator and is used by 4WD clubs throughout Australia.
- Charge you auxiliary battery whilst you drive!
- Cost effective protection against a flat start battery
- Simple enough for DIY installation
- A safe way to charge your auxiliary battery
- Used by 4 wheel drive clubs throughout Australia
What is a Dual Battery Isolator?
A battery isolator is a device designed to allow the vehicle alternator to charge an auxiliary battery whilst the vehicle is running, and to isolate the starter battery from the auxiliary battery when the vehicle is not running. This allows the operator to charge the auxiliary battery when the vehicle is running and run loads from the auxiliary battery whilst the vehicle is off without the risk of discharging the start battery to a point where it is not able to start the vehicle. Modern battery isolators will do this without any input from the vehicle operator.
Redarc Smart Start Dual Battery Isolator as featured on Pat Callinan's 4x4 Adventures
In this review leading 4x4 expert Pat Callinan provides advice when installing a dual battery system in your 4x4. Tips are provided regarding the installation of the Redarc isolator and the type and location of the second battery to be installed. Insights into outback travel are provided as well as answers regarding what to do if your battery fails so that you can start your vehicle in an emergency. Pat provides the best advice and answers all of your questions in this procatical analysis of dual battery isolators.

