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Factory Price Arco Marine Bi-1603 Battery Isolator - 160a - 1 Alternator, 3 Battery [bi-1603] Essentials [GBDcOP4n]

$42.99 $137.99 -69%

BI-1603 Battery Isolator - 160A - 1 Alternator, 3 BatteryThe Arco Marine BI-1603 is an inboard/outboard battery isolator that can handle 1 alternator, 3 batteries, and 160A max. Rated for use with 10 to 350-amp alternators on 12, 24, or 32-volt negat

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Factory Price Arco Marine Bi-1603 Battery Isolator - 160a - 1 Alternator, 3 Battery [bi-1603] Essentials [GBDcOP4n]

BI-1603 Battery Isolator - 160A - 1 Alternator, 3 Battery

The Arco Marine BI-1603 is an inboard/outboard battery isolator that can handle 1 alternator, 3 batteries, and 160A max. Rated for use with 10 to 350-amp alternators on 12, 24, or 32-volt negative ground systems.

Features:

  • 1 alternator, 3 batteries, 160A max
  • Inboard and outboard battery isolators are solid-state devices that allow electrical current to flow in one direction ONLY, thus permitting the alternator to be connected directly to two batteries without fear of one higher-charged battery discharging into the lower-charged battery.
  • Both batteries are always being charged automatically, in proportion, to their needs whenever the engine is running.
  • When battery isolators are used in conjunction with selector switches, it is not necessary to change the switch position to provide for charging of both batteries.
  • Isolators provide proportioning of the output or charging current on the alternator to the batteries as required, regardless of switch position.

NOTE: Battery Isolators cannot be used on 12 volt charging systems with 24 volt trolling motors or newer outboard engines with rectifier-regulator charging systems.

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
Quick Guide (pdf)

What Our Customers Say

January 22, 2026

Absolutely no complaints!

Flawless performance from day one.

- Jason C..

January 22, 2026

Absolutely no complaints!

I'm very pleased with the quality of the item.

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January 22, 2026

Absolutely no complaints!

A high-quality product through and through.

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