REDARC Dual Sensing Smart Start Battery Isolator - 12V 200A

The REDARC Smart Start SBI212D is a microprocessor-controlled dual battery isolator used in a dual battery system. It is designed to be used as a solenoid priority system to protect the start battery from excessive discharge while allowing the auxiliary battery to supply non-essential loads. And its compact size makes it easy to install. The SBI212D provides 12 volt DC incorporating 200A of continuous ratings and is designed for extremely heavy-duty operations. This dual sensing model isolates the start and auxiliary battery in a system where the auxiliary battery may be charged by solar panels, an external AC battery charger, or another external source. The SBI212D also allows the start battery to be charged by the external source once the auxiliary battery reaches 13.2V. It features fault detection and LED indication of operation to warn the user of instances of voltage drop, over-voltage, or excessive current draw conditions. Its components prevent the solenoid from generating high voltage transients, making it better than a diode battery isolator. The SBI range facilitates additional charge via your vehicle's alternator. Equipped with full surge protection, the power saving technology of the SBI212D is used primarily in 4WD and commercial vehicles and provides a safe way to charge an auxiliary battery.

Additional Information

Its components prevent the solenoid from generating high voltage transients, making it better than a diode battery isolator.

Part Type

Battery Isolator

• 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
• Power-saving technology that provides cost-effective protection for the primary battery in a safe and convenient way by using the alternator to charge the auxiliary battery.
• Protect the starter battery's excessive discharge, allowing your auxiliary battery to power your accessories.

Important Notice – Batteries & Hazardous Goods Shipping

This product may contain batteries, cells or chemicals which may be classified as hazardous goods (e.g. lithium content). As a result, shipping must follow restricted routes and approved carriers.

• Delivery Timeframes: Transit times may be longer than standard services mentioned in our listings. Typical delivery can vary depending on your location, courier availability, battery capacity, and stock levels.

• Urgent Orders: If you require this product urgently, please contact us before purchasing so we can provide a more accurate ETA based on your address and current freight options.

• Regulations: All shipments are handled in compliance with hazardous materials regulations, which may limit available services.

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Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Battery Isolator, Dual Sensing, Smart Start, 200 amps, 12 V, Each

The REDARC Smart Start SBI212D is a microprocessor-controlled dual battery isolator used in a dual battery system. It is designed to be used as a solenoid priority system to protect the start battery from excessive discharge, while allowing the auxiliary battery to supply non-essential loads. And its compact size makes it easy to install. The battery isolator provides 12 V DC incorporating 200 amps of continuous ratings—and is designed for extremely heavy-duty operations. This dual sensing model isolates the start and auxiliary battery in a system where the auxiliary battery may be charged by solar panels, an external AC battery charger, or another external source. It also allows the start battery to be charged by the external source once the auxiliary battery reaches 13.2 V.

The unit features fault detection and LED indication of operation to warn the user of instances of voltage drop, over-voltage, or excessive current draw conditions. Its components prevent the solenoid from generating high voltage transients, making it better than a diode battery isolator. The SBI range facilitates additional charge via your vehicle's alternator. Equipped with full surge protection, the power-saving technology of the SBI212D is used primarily in 4WD and commercial vehicles and provides a safe way to charge an auxiliary battery.

Additional details:
• Overmold design
• Compact size and easy installation
• Silver contacts for longer life and suitable for marine applications
• Fault indication
• Fully surge protected
• Charge your auxiliary battery whilst driving
• Protection against a flat start battery
• Cost-effective and safe way to charge your auxiliary battery