This Sure Power Model 24023A-IB is a high-capacity Multi-Battery Isolator designed to manage charging between a vehicle's alternator and multiple battery banks. It acts as a solid-state "check valve," allowing your alternator to charge your starter and auxiliary batteries simultaneously while preventing them from draining each other when the engine is off. Slight dents on the bottom fins.  SEE PHOTOS!

Technical Specifications

Based on the label and manufacturer data, here are the key ratings for this unit:

    • Model: 24023A-IB

    • Max Alternator Amps: 240 Amps (designed for high-output alternators)

    • Operating Voltage: 6-50V DC (compatible with 12V and 24V systems)

    • Ground Type: Negative Ground systems only

    • Configuration: 1-Input (from alternator) and 2 or 3-Output (to separate battery banks)

    • Dimensions: Approximately 12.5" L x 4.5" W x 3.375" H (including posts) 

Key Functions & Benefits

    • Eliminates Battery Drain: It isolates each battery circuit so that auxiliary equipment (like lights, refrigerators, or winches) cannot drain your primary starter battery.

    • Independent Charging: Each battery bank charges according to its own specific needs, improving overall system efficiency.

    • Solid-State Reliability: Unlike mechanical solenoids, this unit has no moving parts, making it more durable and resistant to vibration in marine or off-road environments. 

Installation Highlights

    • Mounting: Should be installed in a well-ventilated area away from direct engine heat or exhaust manifolds to manage heat dissipation.

    • Wiring: Requires heavy-gauge wire due to the 240A rating. For runs up to 15 feet, #000 gauge wire and a 150 amp circuit breaker are typically recommended.

Excitation Terminal ("E"): The "IB" in the model number often indicates an excitation terminal. On certain alternators (like many GM or Ford models), this terminal must be connected to an ignition-switched source to "wake up" the alternator and start the charging process.