Battery Isolator 120A (2)ALT (2)BANK | Arco BI-3202

Arco Marine

$299.50
Unit price per

Battery Isolator Rated for use with up to a 120 amp alternator on 12, 24, or 32-volt negative ground battery systems. This unit is made for a system with two alternators and two batteries.

Arco 120 Amp 2 Bank Battery Isolator | BI-3202

120 Amp 2 bank battery isolator
Two alternators
Two batteries

Rated for use with 10 to 350 amp alternators on 12, 24, or 32 volt negative ground systems.

NOTE: Battery Isolators cannot be used on 12 volt charging systems 2ith 24 volt trolling motors or newer outboard engines with rectifier-regulator charging systems.

2 Alternators, 2 Batteries, 120 Amp max INBOARD AND OUTBOARD BATTERY ISOLATORS are solid-state devices which 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.

Additional Information

Established in 1960, ARCO has 60 years of manufacturing experience with a focus on building the most reliable products. ARCO has been an industry leader in marine electrical parts since pioneering the expansion of newly manufactured marine engine parts over 40 years ago.

The company takes pride in its ability to manufacture in America to the highest standards of quality control and testing.

Proven dependability makes ARCO the trusted source for OEM quality or better alternators, inboard starters, outboard starters, and tilt/trim motors. Nearly 60 years ago, ARCO set the gold standard for marine engine parts. ARCO consistently tests and retests every unit manufactured beyond normal operating conditions. That’s how ARCO delivers the highest quality, most reliable parts available.

ARCO began with a superior commitment to dependable starting and charging products. They then developed the best technical support available in the industry. ARCO ensures the highest quality by following five key principles.

Proudly Based in the USA

In fact, ARCO product manufacturing, quality testing, warehousing, and fulfillment take place right here in good old U.S. of A. - not many of our competitors can say that.

OEMs Rely on ARCO Products

ARCO's products are manufactured and precision tested on-site, before they ever leave the facility. This ensures that every product that carries the ARCO label will perform at or above OEM specifications.

Products are 5x More Reliable

ARCO is proud that their marine engine products are engineered and manufactured with precision quality, therefore making them the most dependable in the industry. ARCO products deliver long term value.

Industry's Best Warranty

The most dependable marine engine parts are now backed by the industry's best warranty! Also, the new ARCO Assurance warranty program protects you, covering parts and labor on warranted products.