REDARC SBI24 Smart Start Battery Isolator 24V 100A

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REDARC Dual Sensing Smart Start Battery Isolator 24V 100A

The REDARC Smart Start® SBI24 is a dual battery isolator used to isolate the start and auxiliary batteries in a dual battery system. The microprocessor-controlled smart battery isolator protects the primary battery from a low charge in the secondary battery so it won’t drain the primary battery, at the same time allowing the auxiliary battery to supply non-essential loads. The SBI24 provides 24V DC incorporating 100A of continuous ratings.

Power saving technology

Used mainly in commercial vehicle dual battery systems, the Smart Start SBI24 battery isolator incorporates components that prevent the solenoid from generating high voltage transients. It’s used in place of a diode battery isolator due to the voltage drop associated with diode type isolation.

Fault detection

The sophisticated fault detection and LED indication of operation alerts users of over-voltage or voltage drops. It is compact, easy to install, and provides full surge protection. The Smart Start SBI24 Battery Isolator is a safe way to charge a dual battery system.


  • Overmold design
  • Compact size and easy installation
  • Silver contacts for longer life and suitable for marine applications
  • Power saving technology
  • Fault indication
  • Fully surge protected

Not sure what dual battery system is best for your vehicle? Let Shaun Whale explain more.

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SKU number  SBI24
UPC number  9338628000029
Output Voltage 24VDC
Output Current Rating (Cont.) 100A
Input Current (Max.) 100A
Input Fuse Rating 100A
Output Fuse Rating 100A
Width (in) 3.54
Height (in) 3.54
Length (in) 3.54
Weight (lb) 0.55
Warranty  2 Years
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