--- product_id: 86240694 title: "Dual Sensing Smart Start Battery Isolator 12V 100A" brand: "redarc" price: "£253.58" currency: GBP in_stock: true category: "Redarc" url: https://www.desertcart.co.uk/products/86240694-dual-sensing-smart-start-battery-isolator-12v-100a store_origin: GB region: United Kingdom --- # 100A continuous heavy-duty rating Dual sensing for start & auxiliary battery Full surge & fault protection Dual Sensing Smart Start Battery Isolator 12V 100A **Brand:** redarc **Price:** £253.58 **Availability:** ✅ In Stock ## Summary > 🔋 Stay charged, stay ahead — power your adventures with smart precision! ## Quick Answers - **What is this?** Dual Sensing Smart Start Battery Isolator 12V 100A by redarc - **How much does it cost?** £253.58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/86240694-dual-sensing-smart-start-battery-isolator-12v-100a) ## Best For - redarc enthusiasts ## Why This Product - Trusted redarc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Built-in surge protection and fault detection with LED alerts keep your system secure - • **Compact & Seamless:** Sleek, overmold design fits easily into any vehicle setup - • **Smart Dual Sensing:** Intelligently isolates and manages start and auxiliary batteries to prevent drain - • **Powerhouse Performance:** Handles 100A continuous current for reliable heavy-duty use - • **Marine-Grade Durability:** Silver contacts ensure longevity even in harsh environments ## Overview The REDARC Smart Start SBI12D is a microprocessor-controlled 12V 100A dual battery isolator designed for dual battery systems in passenger vehicles. It intelligently manages battery charging by isolating the start and auxiliary batteries, preventing excessive discharge and enabling safe, efficient power distribution. Compact and easy to install, it features power-saving technology, fault detection with LED indicators, and full surge protection, making it ideal for 4WD, commercial, and marine applications. ## Description 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. Dual sensing 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. Power saving technology 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. Surge protection The SBI12D has full surge protection and is used primarily in 4WD and commercial vehicles. Choose the SBI12D for a safe way to charge an auxiliary battery. The SBI range manages battery charge for your secondary battery banks while on the move. Features: Overmold design Compact size and easy installation Silver contacts for longer life and suitable for marine applications Power saving technology Fault indication Fully surge protected Need help? For help in choosing the best dual battery setup for your needs use the free?REDARC dual battery selector. Not sure what dual battery system is best for your vehicle? Let Shaun Whale explain more. California residents: see?Proposition 65 information ## Features - MPN::SBI12D - Brand::Redarc ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07F4SG7WK | | Battery Cell Composition | Lithium Ion | | Battery Type | Lithium Ion | | Best Sellers Rank | #1,965,088 in Automotive ( See Top 100 in Automotive ) #2,891 in Battery Chargers | | Brand | REDARC | | Brand Name | REDARC | | Compatible with Vehicle Type | Passenger Car | | Customer Reviews | 4.8 out of 5 stars 13 Reviews | | Global Trade Identification Number | 09338628001330 | | Manufacturer | Redarc | | Manufacturer Part Number | SBI12D | | Model Number | SBI12D | | Number Of Cells | 6 | | Size | Small | | Terminal | Marine Terminal | | Vehicle Service Type | Passenger Car | | Voltage | 12 Volts | ## Product Details - **Brand:** REDARC - **Terminal:** Marine Terminal - **Manufacturer:** Redarc ## Images ![Dual Sensing Smart Start Battery Isolator 12V 100A - Image 1](https://m.media-amazon.com/images/I/61h8dIP81wL.jpg) ## Frequently Bought Together - Dual Sensing Smart Start Battery Isolator 12V 100A - 60A Fuse Kit - Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/86240694-dual-sensing-smart-start-battery-isolator-12v-100a](https://www.desertcart.co.uk/products/86240694-dual-sensing-smart-start-battery-isolator-12v-100a) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-12*