REDARC Dual Sensing Smart Start Battery Isolator 24V 100A

REDARC Dual Sensing Smart Start Battery Isolator 24V 100A

Protect your starting battery while intelligently managing auxiliary battery charging with the REDARC Smart Start® SBI24D Dual Sensing Battery Isolator. Designed for 24V dual battery systems, this microprocessor-controlled isolator delivers a 100A continuous current rating and automatically controls charging between start and auxiliary batteries for reliable vehicle operation.

Built primarily for commercial vehicles and heavy-duty 24V electrical systems, the SBI24D automatically isolates the starting battery from auxiliary loads, helping ensure sufficient power remains available for dependable engine starting while allowing secondary batteries to power non-essential equipment.

The SBI24D features REDARC's advanced dual sensing technology, allowing charging voltage to be detected from either battery. When an auxiliary battery is charged from an external source such as solar panels or an AC battery charger, the isolator automatically reconnects the batteries once the auxiliary battery reaches 26.4 volts, allowing the starting battery to receive charge as well.

Combining power-saving electronics, advanced fault detection, full surge protection, and heavy-duty silver contacts, the SBI24D delivers dependable battery management for commercial fleets, service vehicles, marine installations, and other demanding mobile electrical systems.

24V Operation • 100A Continuous Rating • Dual Sensing Technology • Automatic Battery Protection • Full Surge Protection

Key Features

• 24V Dual Battery Operation: Designed specifically for commercial vehicles and heavy-duty 24-volt electrical systems.
• 100A Continuous Current Rating: Provides reliable battery isolation for moderate to heavy-duty dual battery installations.
• Dual Sensing Technology: Detects charging voltage from either battery, allowing both batteries to benefit from alternator, solar, or external charging sources.
• Automatic Battery Isolation: Protects the starting battery by separating auxiliary loads when charging voltage is unavailable.
• Microprocessor-Controlled Operation: Continuously monitors system voltage and automatically manages battery connection.
• Power Saving Technology: Reduces power consumption while minimizing high-voltage transients generated by the solenoid.
• Advanced Fault Detection: Monitors for over-voltage, voltage drop, and excessive current draw conditions.
• LED Status Indication: Provides visual confirmation of operating status and fault conditions.
• Heavy-Duty Silver Contacts: Long-life contact design suitable for commercial and marine applications.
• Fully Surge Protected: Helps protect sensitive vehicle electrical systems from damaging voltage spikes.

Why It Performs

• Protects Your Starting Battery: Automatically prevents auxiliary accessories from discharging the battery required to start your vehicle.
• Supports Multiple Charging Sources: Dual sensing technology allows both batteries to receive charge from alternators, solar systems, and external AC chargers.
• Automatically Shares Available Charging Power: When the auxiliary battery reaches the appropriate charging voltage, the isolator reconnects both batteries for efficient charging.
• Reduces Voltage Loss: Solenoid-based isolation provides improved charging efficiency over traditional diode battery isolators.
• Built for Commercial Applications: Rugged construction and a 100A continuous rating deliver dependable performance in demanding working environments.
• Improves Long-Term Reliability: Fault monitoring, surge protection, and power-saving electronics help ensure consistent system operation.

Technical Specifications

• Brand: REDARC
• Product: Smart Start® Dual Sensing Battery Isolator
• Model: SBI24D
• System Voltage: 24V
• Continuous Current Rating: 100 Amps
• Battery Sensing: Dual Sensing
• Control Type: Microprocessor Controlled
• Protection: Surge Protection and Fault Detection
• Status Indication: LED Indicator
• Contact Material: Heavy-Duty Silver Contacts

What's Included

• (1) REDARC Smart Start® SBI24D Dual Sensing Battery Isolator

Important Installation Note: The SBI24D is designed for 24V dual battery systems where the auxiliary battery may also receive charge from external sources such as solar panels or AC battery chargers. Proper cable sizing, overcurrent protection, and installation practices are essential for safe operation. Mounting hardware, wiring, batteries, and charging equipment are sold separately.

Ideal For

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

Why Choose the REDARC Smart Start SBI24D?

• Purpose-built for reliable 24V dual battery management.
• Dual sensing technology supports charging from alternators, solar systems, and external battery chargers.
• Automatically protects the starting battery while maintaining auxiliary battery performance.
• 100A continuous rating supports demanding commercial electrical applications.
• Microprocessor-controlled operation provides intelligent, fully automatic battery management.
• Built to REDARC's proven standards for commercial, marine, and heavy-duty vehicle 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 solution 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!