ARCO Marine BI-1203-3A Battery Isolator - 120A, 1 Alternator, 3 Batteries

BI-1203-3A Battery Isolator - 120A - 1 Alternator, 3 Battery

The Arco Marine BI-1203-3A is an inboard/outboard battery isolator that can handle 1 alternator, 3 batteries, and 120A max. Rated for use with 10 to 350-amp alternators on 12, 24, or 32-volt negative ground systems.

*Includes exciter terminal

Features:

• 1 alternator, 3 batteries, 120A 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.

The ARCO Marine BI-1203-3A battery isolator is a reliable, solid-state device designed for marine and vehicle applications with inboard and outboard systems. Capable of handling up to 120 amps, it supports one alternator and three batteries, making it ideal for managing multiple battery banks efficiently. Its compatibility with 12, 24, or 32-volt negative ground systems ensures versatile installation across a variety of power setups. This isolator includes an exciter terminal for seamless integration with your existing electrical system, providing automatic and proportional charging to each battery based on their needs. The device's solid-state design ensures unidirectional current flow, preventing higher-charged batteries from discharging into lower-charged ones, thus maintaining optimal battery health and longevity.

Features:

• Supports 1 alternator, 3 batteries, with a maximum current of 120 amps

• Solid-state design allows current flow in only one direction, preventing battery discharge

• Automatically charges both batteries proportionally whenever the engine runs

• Compatible with systems using 10 to 350-amp alternators on 12V, 24V, or 32V negative ground systems

• Includes an exciter terminal for easy system integration

• Eliminates the need to manually switch battery selector switches for charging when used in conjunction with switches

• Proportionally distributes charging current based on battery needs, enhancing battery maintenance