ARCO Battery Isolator BI-1203

Name: ARCO Battery Isolator BI-1203
Brand: Arco Marine Parts

ARCO BI-1203 solid-state marine battery isolator for 1 alternator, 3 batteries, 120 A max; rated for 10–350 A alternators on 12, 24 or 32 V negative ground systems. Replaces Sierra 18-6851.

Description

The ARCO Battery Isolator BI-1203 is a solid-state battery isolator for inboard and outboard boats, configured for 1 alternator, 3 batteries, 120 A max. It replaces Sierra 18-6851.

How it works

The isolator is a solid-state device that lets current flow in one direction only, so a single alternator can be connected directly to multiple batteries without the higher-charged battery discharging into the lower one. All batteries are charged automatically, in proportion to their needs, whenever the engine runs. When used with selector switches, the switch position does not need to be changed to charge both batteries.

Technical data

Rated for 10 to 350 amp alternators
12, 24 or 32 volt negative ground systems
Configuration: 1 alternator, 3 batteries, 120 A max

Limitations

Not suitable for 12 volt charging systems with 24 volt trolling motors, or for newer outboard engines with rectifier-regulator charging systems

Specifications

Price	223.55

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