Description
ARCO Marine BI-0702-4 Battery Isolator | Boat Supply Store
Effectively manage your dual battery system with the ARCO Marine BI-0702-4 Battery Isolator, designed for a single alternator to charge two independent batteries without cross-discharge. This solid-state isolator ensures proportional charging and prevents battery depletion, essential for maintaining reliable power on vessels like offshore fishing boats navigating the Gulf Coast. Rated for 70A and compatible with 12, 24, or 32-volt negative ground systems, it supports alternators from 10 to 350 amps.
Key Features
- Automates dual battery charging from a single alternator.
- Prevents battery discharge between banks.
- Handles up to 70A maximum continuous current.
- Supports 12, 24, or 32-volt negative ground systems.
- Solid-state design for one-way current flow.
- Includes a regulator sensing terminal for precise charging.
- Compatible with alternators ranging from 10 to 350 amps.
- Simplifies electrical management, eliminating switch adjustments.
Specifications
| Product Specifications | |
|---|---|
| Brand | ARCO Marine |
| Model | BI-0702-4 |
| Amperage Rating | 70A max |
| Alternators Supported | 1 |
| Batteries Supported | 2 |
| System Voltage | 12, 24, or 32-volt negative ground |
| Alternator Compatibility | 10 to 350-amp alternators |
| Features | Regulator sensing terminal |
Who This Is For
Boat owners with existing dual battery systems seeking an automated, reliable method to charge both banks from a single alternator. Ideal for preventing parasitic drain and ensuring consistent battery readiness for critical onboard electronics.
How It Compares
| Feature | ARCO Marine BI-0702-4 Battery Isolator | Competitor |
|---|---|---|
| Max Amperage | 70A | 120A |
| Number of Batteries Supported | 2 | 2 |
| Number of Alternators Supported | 1 | 1 |
| Voltage Systems | 12, 24, or 32-volt negative ground | 12-24V DC |
| Technology Type | Diode Isolator | Automatic Charging Relay |
Common Concerns Answered
Will this isolator generate excessive heat?
While diode isolators can generate heat, proper ventilation around the unit is crucial. Ensure the installation location allows for adequate airflow to dissipate heat during operation.
Can I return this isolator to BoatSupplyStore.com if it has issues?
This product typically requires direct contact with the manufacturer for warranty claims or issues, rather than return to the point of purchase. Review manufacturer warranty details for specifics.
Is this isolator compatible with all modern charging systems?
No, it is not suitable for all modern systems such as smart alternators or certain newer outboard engines equipped with advanced rectifier-regulator charging systems, which may require different charging management solutions.
Frequently Asked Questions
How does a battery isolator work?
A battery isolator uses diodes to allow current to flow from the alternator to each battery independently. It prevents the discharge of one battery into another, ensuring both receive optimal charging.
Can I use this battery isolator with a 12-volt system and a 24-volt trolling motor?
No, this isolator is designed for single voltage systems (12V, 24V, or 32V negative ground). Mixing voltage systems like a 12V main with a 24V trolling motor is not supported and can damage components.
What is the maximum amperage this battery isolator can handle?
The ARCO Marine BI-0702-4 has a maximum amperage rating of 70A, making it suitable for charging systems within this capacity.
How many alternators and batteries can this isolator support?
This isolator is designed to support one alternator and two batteries.
What voltage systems is this isolator rated for?
The isolator is rated for 12, 24, or 32-volt negative ground systems.
