REDARC SBI12 12 V 100A Smart Start Battery Isolator for Dual Battery Systems

Vehicle Fitment

• Universal accessory for 12 V dual battery systems in 4x4 vehicles, campers, vans, RVs, and off-road rigs

Features

• Smart Start® SBI12 battery isolator for managing dual battery systems
• Microprocessor-controlled isolator connects auxiliary battery when charging
• Protects start battery from excessive drain by auxiliary loads when engine is off
• Allows auxiliary battery to supply non-essential loads safely
• Low standby current consumption for efficiency
• Overmould design with silver contacts for corrosion resistance
• Fault indication and surge-protected circuitry for reliable operation
• Compact and easy to install near the start battery bank

Specifications

• Part Number: SBI12
• Operating Voltage: 12 V DC
• Continuous Current Rating: 100 A
• Max Inrush Current: 400 A
• Turn-On Voltage: ~13.2 V
• Turn-Off Voltage: ~12.6-12.7 V
• Standby Current: < 5 mA
• Dimensions: ~75 x 70 x 80 mm
• Weight: ~200 g (0.4 lbs)
• Warranty: 2 year limited

Included Components

• 1x REDARC Smart Start battery isolator (SBI12)
• Connection studs and mounting points
• Installation instructions

Product Description

The **REDARC SBI12 Smart Start Battery Isolator** is a robust solution for managing 12 V dual battery setups in vehicles such as 4WDs, campers, off-road rigs, vans, or RVs. It uses microprocessor-controlled logic to connect an auxiliary battery to the charging circuit once the starter battery has sufficient charge from the alternator. At the same time, the SBI12 prevents the starter battery from being drained by loads connected to the auxiliary side when the engine is off, helping preserve cranking capacity and preventing unnecessary battery depletion.

Designed with low standby current draw, surge-protected circuitry, and rugged construction, this isolator offers reliable performance and protects both starter and auxiliary batteries in a wide range of dual battery applications. It's compact and intended for installation near the start battery bank with appropriate fusing and wiring. Ideal for powering accessories like fridges, lights, winches, or camping power systems without risking the main battery losing charge, the SBI12 enhances dual battery system efficiency and longevity.