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The REDARC Smart Start® SBI12D is a microprocessor-controlled dual battery isolator used in a dual battery system. It’s manufactured for use as a solenoid priority system to protect the start battery from excessive discharge while allowing the auxiliary battery to supply non-essential loads.
The SBI12D provides 12 volt DC incorporating 100A of continuous ratings and is designed for heavy-duty operations. The dual sensing model is compact and easy to install. It isolates the start and auxiliary battery in a system where the auxiliary battery may be charged by an external source. The SBI12D also allows the start battery to be charged by the external source after the auxiliary battery reaches 13.2V.
The power saving technology includes fault detection and LED indication of operation to warn users of voltage drops, over-voltage, or excessive current draw conditions. The SBI12D has components that prevent the solenoid from generating high voltage transients. It’s better than a diode battery isolator based on the the voltage drop associated with a diode type isolation.
| Part Number | SBI12D |
| Brand | REDARC |
| Max. Inrush Current | 400A |
| Max. Continuous Current | 100A |
| Turn On Voltage | 13.2V |
| Turn Off Voltage | 12.7V |
| Turn On Delay | 5 seconds |
| Turn Off Delay | 10 seconds |
| Standby Current | <5mA |
| Weight | 7 oz (200 g) |
| Height | 2.48" (70 mm) |
| Width | 2.95" (75 mm) |
| Depth / Length | 3.15" (80 mm) |
| Warranty | 2 Years |
| System Voltage | 12V |
| Output Voltage | 12V DC |
| Input Fuse Rating | 100A |
| Output Fuse Rating | 100A |
Universal application, not vehicle-specific.
Will it fit my vehicle?
See the Fitment section above. If you are unsure, email [email protected] before ordering and we will confirm fitment.
What warranty does it have?
REDARC covers this product with a 2-year warranty.
Should I have it professionally installed?
REDARC recommends installation by a qualified auto electrician or technician.
Why Choose Venture Overland Company: Free shipping on orders over $100, most orders ship in 1-2 business days, and every order is covered by our 30-day return policy.
Gear Up for Adventure
At Venture Overland Company, our motto is simple: Find Your Way. Whether you're hitting the backroads for a weekend escape or building the ultimate overland rig for months on the trail, we're here to help you get there. Every part we carry is chosen to give you the reliability, performance, and confidence to go farther and explore more. Load up, point the wheels off the pavement, and find your way—your adventure starts here.
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At Venture Overland Company, we provide a carefully curated selection of top-tier brands and expert guidance to help you enhance your vehicle’s performance. Our community-driven approach ensures every product integrates seamlessly into your adventures, whether upgrading your Jeep, Toyota, or Ford. With our focus on quality, versatility, and outstanding service, we’re more than a store—we’re your partner in every off-road experience.
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