REDARC Dual Sensing Smart Start Battery Isolator 24V 200A

REDARC Dual Sensing Smart Start Battery Isolator 24V 200A

Protect your primary battery while automatically managing auxiliary battery charging with the REDARC Smart Start® SBI224D Dual Sensing Battery Isolator. Designed for demanding 24V electrical systems, this microprocessor-controlled battery isolator delivers a 200A continuous current rating while intelligently controlling power flow between your start and auxiliary batteries.

Ideal for commercial vehicles, heavy-duty trucks, industrial equipment, and specialized 24V applications, the SBI224D automatically isolates the starting battery from auxiliary loads to help ensure reliable engine starting while allowing accessories and secondary battery banks to operate independently.

The SBI224D features dual sensing technology, allowing charging voltage to be detected from either battery. When the auxiliary battery is charged by an external source such as solar panels or an AC battery charger, the isolator automatically connects both batteries once the auxiliary battery reaches 26.4V, allowing the starting battery to receive charge as well.

Built with REDARC's proven Smart Start technology, the SBI224D incorporates power-saving electronics, full surge protection, advanced fault detection, and heavy-duty silver contacts for dependable performance in harsh commercial, marine, and off-road environments.

24V Operation • 200A Continuous Rating • Dual Sensing Technology • Automatic Battery Protection • Microprocessor Controlled

Key Features

• 24V Dual Battery Operation: Specifically engineered for 24-volt electrical systems found in commercial and heavy-duty vehicles.
• 200A Continuous Rating: Supports high-current dual battery installations requiring dependable battery isolation.
• Dual Sensing Technology: Detects charging voltage from either battery, allowing both batteries to benefit from alternator, solar, or external charging sources.
• Automatic Start Battery Protection: Isolates auxiliary loads to help prevent excessive discharge of the starting battery.
• Microprocessor Controlled: Continuously monitors battery voltage and automatically manages battery connection.
• Power Saving Technology: Minimizes power consumption while reducing high-voltage transients generated by the solenoid.
• Advanced Fault Detection: Monitors for over-voltage, voltage drop, and excessive current draw conditions.
• Fully Surge Protected: Helps safeguard vehicle electrical systems against damaging voltage spikes.
• Heavy-Duty Silver Contacts: Designed for long service life and reliable switching performance, including marine environments.
• Compact Overmold Housing: Durable construction allows installation where space is limited.

Why It Performs

• Protects Your Starting Battery: Automatically disconnects auxiliary loads to preserve enough battery power for reliable engine starting.
• Supports Multiple Charging Sources: Dual sensing allows both batteries to receive charge from alternators, solar systems, and external AC chargers.
• Eliminates Diode Voltage Loss: Solenoid-based isolation avoids the voltage drop commonly associated with traditional diode isolators.
• Optimizes Charging Efficiency: Automatically reconnects both batteries when sufficient charging voltage is available.
• Built for Demanding Applications: Rugged construction, surge protection, and fault monitoring deliver dependable operation in commercial and harsh operating environments.
• Simplifies Dual Battery Management: Fully automatic operation eliminates the need for manual battery switching.

Technical Specifications

• Brand: REDARC
• Product: Smart Start® Dual Sensing Battery Isolator
• Model: SBI224D
• System Voltage: 24V
• Continuous Current Rating: 200 Amps
• Battery Sensing: Dual Sensing
• Control Type: Microprocessor Controlled
• Protection: Surge Protection and Fault Detection
• Status Indication: LED Fault Indication
• Contact Material: Heavy-Duty Silver Contacts

What's Included

• (1) REDARC Smart Start® SBI224D Dual Sensing Battery Isolator

Important Installation Note: The SBI224D is designed for 24V dual battery systems. Proper cable sizing, overcurrent protection, and installation practices are essential for safe operation. Verify compatibility with your vehicle's charging system before installation. Mounting hardware, wiring, and batteries are sold separately.

Ideal For

• Commercial Vehicles
• Heavy-Duty Trucks
• Service Vehicles
• Industrial Equipment
• 24V Dual Battery Systems
• Marine Electrical Systems
• Solar-Assisted Battery Charging
• Auxiliary Battery Banks
• Fleet Vehicles
• Remote Work Vehicles

Why Choose the REDARC Smart Start SBI224D?

• Purpose-built for demanding 24V dual battery applications.
• Dual sensing technology enables charging from multiple power sources.
• Protects the starting battery while maximizing auxiliary battery charging.
• Heavy-duty 200A continuous rating supports high-current electrical systems.
• Microprocessor-controlled operation delivers intelligent, automatic battery management.
• Built to REDARC's proven standards for commercial, off-road, and marine environments.

Why Buy from Expedition Superstore?

• Authorized REDARC Dealer: Shop genuine REDARC battery management, charging, solar, and vehicle electrical products backed by knowledgeable overland and commercial vehicle specialists.
• Complete Power Solutions: Find battery isolators, BCDC chargers, lithium batteries, solar panels, inverters, and electrical accessories all in one place.
• Expert System Support: Get help selecting the right battery management components for your vehicle, fleet, or off-grid electrical system.
• Free Shipping: Enjoy free shipping on qualifying orders over $349 so you can spend less on freight and more on your build.
• Need help designing your dual battery system? — Schedule your build chat today!