REDARC SBI224D Dual Sensing Smart Start Battery Isolator 24V 200A

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REDARC Dual Sensing Smart Start Battery Isolator 24V 200A

The REDARC Smart Start® SBI224D is primarily used in commercial vehicles to protect the start battery from excessive discharge and provides 24V DC, while incorporating 200A of continuous ratings.

This dual sensing model allows charging of batteries in instances when the auxiliary battery may also be charged by an external source, such as an external AC battery charger or solar panels. When the auxiliary battery reaches 26.4V from its external source, the SBI224D will then charge the start battery as well.

Additionally, the microprocessor-controlled battery isolator has power saving technology that prevents the solenoid from generating high voltage transients. It is used rather than a diode battery isolator due to the voltage drop associated with diode type isolation. Advanced fault detection warns the user of over-voltage, voltage drop, and excessive current draw conditions.

If you’re looking for safe way to charge auxiliary batteries and receive full surge protection, rely on the easy-to-install REDARC Smart Start® SBI224D. The SBI range manages battery charge for your secondary battery banks when on the road to your next great adventure.


  • 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  SBI224D
UPC number  9338628004492
Output Voltage 24VDC
Output Current Rating (Cont.) 200A
Input Current (Cont.) 200A
Input Fuse Rating  200A
Output Fuse Rating  200A
Width (in) 3.74
Height (in) 3.74
Length (in) 3.74
Weight (lb) 1.69
Warranty  2 Years
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