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.

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, use the free REDARC dual battery selector.

Smart Start SBI 12V 100A

Smart Start SBI 12V 100A

SBI12

The REDARC Smart Start® SBI12 is a 100A 12V microprocessor-controlled battery isolator which ...
$116.00 USD
Smart Start SBI 12V 200A

Smart Start SBI 12V 200A

SBI212

The REDARC Smart Start® SBI212 is a 200A 12V battery isolator used as a solenoid priority sys...
$235.00 USD
Smart Start SBI 24V 100A

Smart Start SBI 24V 100A

SBI24

The REDARC Smart Start® SBI24 is a 24V 100A dual battery isolator used to isolate the start a...
$139.00 USD
Smart Start SBI 24V 200A

Smart Start SBI 24V 200A

SBI224

Smart Start® SBI224 protects the start battery from excessive discharge while the auxiliary b...
$255.00 USD
Dual Sensing Smart Start Battery Isolator 12V 100A

Dual Sensing Smart Sta...

SBI12D

The REDARC Smart Start® SBI12D is a 100A 12v dual battery isolator used in a dual battery sys...
$137.00 USD
Dual Sensing Smart Start Battery Isolator 12V 200A

Dual Sensing Smart Sta...

SBI212D

The REDARC Smart Start® SBI212D is a 12v 200A dual battery isolator used in a dual battery sy...
$271.00 USD
Dual Sensing Smart Start Battery Isolator 24V 100A

Dual Sensing Smart Sta...

SBI24D

The REDARC Smart Start® SBI24D is a 24V 100A dual battery isolator that is used to isolate st...
$161.00 USD
Dual Sensing Smart Start Battery Isolator 24V 200A

Dual Sensing Smart Sta...

SBI224D

The 24V 200A REDARC Smart Start® SBI224D primarily used in commercial vehicles to protect the...
$294.00 USD
Smart Start Battery Isolator & Wiring Kit 12V

Smart Start Battery Is...

SBI12KIT

The Smart Start® Dual Battery Isolator and Wiring Kit (SBI12KIT) is equipped with everything need...
$226.00 USD
Smart Start Load Disconnect Isolator

Smart Start Load Disco...

SBI12-LLD

The SBI12-LLD is a microprocessor-controlled Load Disconnect Isolator. The SBI12-LLD is designed ...
$116.00 USD
BMS Load Disconnect Isolator

BMS Load Disconnect Is...

SBI12-BLD

The SBI12-BLD is used in conjunction with a REDARC Manager30 BMS in a 12v negative ground automot...
$116.00 USD