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General Description: The REDARC Smart Start® SBI12 is a microprocessor-controlled battery isolator designed for dual battery systems. It protects the start battery from excessive discharge while allowing the auxiliary battery to supply charge to non-essential loads like fridges, lighting, or accessories. It functions as a solenoid priority system and provides 12V DC with 100A continuous ratings. The SBI12 is suitable for 4WD, RV, truck, and commercial vehicle applications, and its overmold design and silver contacts ensure longer life, including in marine environments. It features electronic switching to avoid voltage drop common in diode-type isolators and prevents high voltage transients. It also includes power-saving technology, low standby current draw, and fault detection with LED indication for issues like voltage drops, over-voltage, or excessive current draw. It is compact and easy to install, typically near the start battery bank with appropriate fusing and wiring. Technical Specifications: Output Voltage: 12VDC Output Current Rating (Cont.): 100A Input Current (Max.): 100A Input Fuse Rating: 100A Output Fuse Rating: 100A Length: 8.00 cm Width: 7.50 cm Height: 6.30 cm Weight: 0.20 kg Warranty: 2 Years Installation Guide: The REDARC Smart Start SBI12 is compact and intended for installation near the start battery bank with appropriate fusing and wiring. Detailed installation instructions are available in the product resources, and the product may require additional parts to complete installation, such as 100A or 60A fuse kits which are sold separately.