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The REDARC Smart Start® SBI2 is a microprocessor-controlled battery isolator used in dual battery systems as a solenoid priority system. It will protect the start battery from excessive discharge, whilst allowing the auxiliary battery to supply non-essential loads. The SBI2 provides 12 volt DC incorporating 100A of continuous ratings.


Power Saving Technology:

The battery isolator is primarily used in 4WD and commercial vehicles and incorporates electronic components that will prevent the solenoid from generating high voltage transients. It is better than a diode battery isolator due to the voltage drop associated with diode type isolation. It features a low standby current draw and sophisticated fault detection and LED indication of operation to warn the user of faults including over-voltage, voltage drop and excessive current draw conditions.




  • Overmould design
  • Compact in size and easy to install
  • Silver contacts for longer life and suitable for marine applications
  • Power saving technology
  • Fault indication
  • Fully surge protected




  • Input (Operating) Voltage: 12V DC
  • Output Current Rating (Cont.): 100A
  • Input Fuse Rating: 100A
  • Output Fuse Rating: 100A
  • Length (mm): 80
  • Width (mm): 75
  • Height (mm): 63
  • Type Approval: CE


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