SKU: H44GTQ18JL |  Mfg. Part: BI-1203-3A  | UPC: 693006007496  | 
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Arco Marine BI-1203-3A Battery Isolator for 10-350A Alternators

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$152.69  $206.13
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Product Overview

ARCO Marine Battery Isolator for 10-350A Alternators

The ARCO Marine Battery Isolator is designed to seamlessly manage the charging of up to 3 batteries from a single alternator. With a maximum rating of 120A, it is suitable for use with alternators ranging from 10 to 350 amps and works on 12, 24, or 32-volt negative ground systems.

This robust isolator includes an exciter terminal, ensuring efficiency and convenience in your battery management.

Important Note: This device is not suitable for use in 12-volt charging systems with 24-volt trolling motors or newer outboard engines equipped with rectifier-regulator charging systems.

Return Policy: Please be advised that this product cannot be returned to the original point of purchase. For any issues or concerns, directly contact the manufacturer.

Technical Specifications

  • Supports 1 alternator and up to 3 batteries with a maximum of 120A.
  • Allows for the safe flow of current in one direction, preventing battery discharge.
  • Automatically charges both batteries in proportion to their needs while the engine is running.
  • No need to change switch positions for battery charging when using isolators with selector switches.
  • Ensures proportioned output or charging current distribution to all connected batteries.

Product Details

  • Manufacturer:
  • Model Number:
  • UPC:
  • Condition:
  • Weight:
  • Dimensions:
  • Updated:
  • Added:
  • ARCO Marine
  • BI-1203-3A
  • 693006007496
  • New
  • 2.9 lbs
  • 8 X 4 X 5
  • Feb 21, 2026
  • Mar 06, 2025
Product Identifiers: Brand: Arco Marine • Part #: BI-1203-3A • UPC: 693006007496 • Category: Battery Converters

Arco Marine BI-1203-3A Battery Isolator for 10-350A Alternators

Reviews for Arco Marine BI-1203-3A

$152.69