ARCO Marine BI-1202 Battery Isolator - 120A - 1 Alternator, 2 Battery

The Arco Marine BI-1202 Battery Isolator is an essential component for optimizing your boat's electrical system. Whether you have an inboard or outboard setup, this isolator ensures efficient charging and protection for your dual battery configuration, enhancing both performance and battery lifespan.

Product Overview

The BI-1202 Battery Isolator is engineered to manage one alternator and two batteries with a maximum current of 120A. It is compatible with alternators ranging from 10 to 350 amps and supports 12, 24, or 32-volt negative ground systems, making it a versatile choice for various marine applications.

Key Features

• High Capacity: Supports 1 alternator, 2 batteries, and up to 120A max.
• Versatile Compatibility: Suitable for 10 to 350-amp alternators on 12, 24, or 32-volt systems.
• Solid-State Technology: Ensures electrical current flows in one direction only, preventing battery discharge.
• Automatic Charging: Both batteries are charged proportionally to their needs whenever the engine is running.
• Seamless Integration: When used with selector switches, there’s no need to manually change switch positions for charging both batteries.
• Proportional Current Distribution: Automatically adjusts the charging current to each battery based on demand, regardless of switch settings.

Specifications

Parameter	Details
Model	BI-1202
Max Current	120A
Alternator Compatibility	10 to 350 amps
Voltage Systems	12V, 24V, 32V negative ground
Battery Configuration	1 Alternator, 2 Batteries

Important Considerations

Note: Battery isolators should not be used on 12-volt charging systems that incorporate 24-volt trolling motors or newer outboard engines with rectifier-regulator charging systems. Ensure compatibility with your boat's electrical setup before installation.

Return Policy

This product cannot be returned to the original point of purchase. If you encounter any issues or have concerns, please contact the manufacturer directly for support.

Additional Resources

For more detailed information on installation and usage, refer to the Quick Guide (PDF).

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.