ARCO Marine BI-0702 Battery Isolator - 70A - 1 Alternator, 2 Battery

The Arco Marine BI-0702 Battery Isolator is a reliable solution for managing your boat’s electrical system. Designed to handle one alternator and two batteries, this isolator ensures optimal charging and prevents battery drain, making it an essential component for any marine enthusiast.

Key Features

• Capacity: Supports 1 alternator, 2 batteries, up to 70A max
• Compatibility: Suitable for 10 to 350-amp alternators on 12, 24, or 32-volt negative ground systems
• Solid-State Design: Allows electrical current to flow in one direction only, preventing higher-charged batteries from draining into lower-charged ones
• Automatic Charging: Both batteries are charged proportionally to their needs whenever the engine is running
• Seamless Integration: No need to adjust switch positions when used with selector switches, ensuring both batteries are charged regardless of switch settings
• Proportioned Charging: Distributes the alternator’s output or charging current to each battery as required, maintaining battery health

Technical Specifications

Parameter	Details
Alternators Supported	10 to 350-amp
Voltage Systems	12V, 24V, 32V
Maximum Current	70A
Battery Configuration	1 Alternator, 2 Batteries

Important Notes

Compatibility Warning: Battery isolators should not be used on 12-volt charging systems with 24-volt trolling motors or newer outboard engines equipped with rectifier-regulator charging systems.

Customer Assurance

Return Policy: This product cannot be returned to the original point of purchase. For any issues or concerns, please contact the manufacturer directly.

Additional Resources

Download the Quick Guide (PDF) to get started with installation and setup.

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.