Ignitions and Electrical› Charging Systems

ARCO MARINE

BATTERY ISOLATOR 70 AMP MAX INBOARD AND OUTBOARD

$148.87

SKU: A09I BI-0703

In Stock
In Stock
Ships by Jun 14
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The ARCO Marine BI-0703 is a battery isolator designed for marine applications. It is a solid-state device that allows electrical current to flow in one direction only, enabling an alternator to be connected directly to two batteries without the risk of one battery discharging into the other. This ensures both batteries are charged automatically and proportionally to their needs whenever the engine is running.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandARCO MARINE
Part NumberA09I BI-0703

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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