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FREE SHIPPING on orders over $99 in Contiguous US* All orders shipped from North Carolina.
Low fixed freight for AK, HI, Canada & Mexico *Excludes heavy and bulky items.
CHRISTMAS SHUTDOWN: Orders placed from Dec 23rd to Jan 2nd will not be shipped until Jan 3rd
FREE SHIPPING on orders over $99 in Contiguous US* All orders shipped from North Carolina Low fixed freight for AK, HI, Canada & Mexico
*Excludes heavy and bulky items.

Dual Battery Isolators

Extend your vehicle’s battery life and ensure it remains charged with a REDARC dual battery isolator. Used as a solenoid priority system in a dual battery system, a multi battery isolator from REDARC will help you adventure further and for longer. learn more

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  1. Smart Start SBI 12V 100A SBI12
    USD $140.00
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    The REDARC Smart Start® SBI12 is a 100A 12V microprocessor-controlled battery isolator which protects the start battery from excessive discharge, while allowing the auxiliary battery to supply charge to non-essential loads.
  2. Smart Start SBI 12V 200A SBI212
    USD $280.00
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    The REDARC Smart Start® SBI212 is a 200A 12V battery isolator used as a solenoid priority system to protect the start battery from excessive discharge while the auxiliary battery is supplying non-essential loads.
  3. Smart Start SBI 24V 100A SBI24
    USD $165.00
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    The REDARC Smart Start® SBI24 is a 24V 100A dual battery isolator used to isolate the start and auxiliary batteries in a dual battery system.
  4. Smart Start SBI 24V 200A SBI224
    USD $305.00
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    Smart Start® SBI224 protects the start battery from excessive discharge while the auxiliary battery is supplying non-essential loads in dual battery systems.
  5. Dual Sensing Smart Start Battery Isolator 12V 100A SBI12D
    USD $165.00
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    The REDARC Smart Start® SBI12D is a 100A 12v dual battery isolator used in a dual battery system. It protects the start battery from excessive discharge while allowing the auxiliary battery to supply non-essential loads.
  6. Dual Sensing Smart Start Battery Isolator 12V 200A SBI212D
    USD $325.00
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    The REDARC Smart Start® SBI212D is a 12v 200A dual battery isolator used in a dual battery system. It is designed to protect the start battery from excessive discharge while allowing the auxiliary battery to supply non-essential loads.
  7. Dual Sensing Smart Start Battery Isolator 24V 100A SBI24D
    USD $190.00
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    The REDARC Smart Start® SBI24D is a 24V 100A dual battery isolator that is used to isolate start and auxiliary batteries in a dual battery system. It protects the start battery from a low charge in the secondary battery.
  8. Dual Sensing Smart Start Battery Isolator 24V 200A SBI224D
    USD $350.00
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    The 24V 200A REDARC Smart Start® SBI224D primarily used in commercial vehicles to protect the start battery from excessive discharge and provides 24V DC, while incorporating 200A of continuous ratings.
  9. Smart Start Battery Isolator & Wiring Kit 12V SBI12KIT
    USD $269.00
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    The REDARC Smart Start® SBI12D is a 100A 12v dual battery isolator used in a dual battery system. It protects the start battery from excessive discharge while allowing the auxiliary battery to supply non-essential loads.
  10. Smart Start Load Disconnect Isolator SBI12-LLD
    USD $140.00
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    The SBI12-LLD is a microprocessor-controlled Load Disconnect Isolator. The SBI12-LLD is designed specifically for use in LiFePO4 battery applications as a system to protect the lithium battery from being excessively discharged by auxiliary loads.
  11. BMS Load Disconnect Isolator SBI12-BLD
    USD $140.00
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    The SBI12-BLD is used in conjunction with a REDARC Manager30 BMS in a 12v negative ground automotive system to protect the auxiliary battery from excessive discharge.
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REDARC Battery Isolators

As a microprocessor-controlled battery isolator, the REDARC Smart Start SBI range protects your primary battery by using your alternator to charge your auxiliary battery. With state of the art power saving technology, our dual battery isolator kits are compact in size and easy to install. Not to mention, they have a sophisticated fault detection system which can warn you of over-voltage, voltage drops and excessive draw conditions.

Going overlanding? You provide the adventure, we’ll provide the power. Choose from our range of dual battery isolators to help protect the starter battery’s excessive discharge, allowing your auxiliary battery to power your accessories.

For the ultimate set up, pair a REDARC dual smart battery isolator with a battery management system. With all this power and the ability to withstand the harshest conditions, you can count on REDARC for your next adventure. Shop 12 volt battery isolators at REDARC with free shipping in the contiguous US.

Need help?

For help in choosing the best DC to DC charger or dual battery isolator setup for your needs, or find the right 12v gear to suit your vehicle.

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Need a little help with choosing the right product? We're here to help! You can use our handy vehicle look-up tool, find a local installer or stockist in your area or check out our FAQs.

Still not sure? Don't stress, you can contact our helpful Tech Support Team by phone or email too.

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