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The Fishing Fleet and the True® SBI

We’ve just completed a full upgrade across our fishing fleet—replacing every isolator with the True® Smart Battery Isolator. The difference was immediate. It’s an incredibly well-engineered product: beautifully simple, flawlessly functional, and built for real-world reliability. We paired it with your custom cable, and it made routing clean, fast, and hassle-free. Couldn’t be happier with the results—True® definitely lives up to its name.

 

Installing a True® Smart Battery Isolator in your fishing boat is a smart upgrade for managing dual batteries—keeping your starter battery protected while powering accessories like fish finders, trolling motors, and lights. Here’s a step-by-step guide with helpful video tutorials to walk you through the process:

⚙️ Step-by-Step Installation Guide

  1. Understand the System Basics Learn what a dual battery isolator does and why it’s essential for marine setups.
    • explains the benefits and layout of a smart isolator system.
  2. Plan Your Wiring Layout Decide where to mount the isolator and batteries. Use marine-grade cables and waterproof connectors.
    • offers a clear wiring demonstration using busbars and fuse blocks.
  3. Mount the Isolator Secure the True® isolator near your batteries or fuse panel using screws or adhesive mounts.
    • shows how to mount and wire the isolator in a boat setup.
  4. Connect the Batteries
    • Connect the starter battery to one terminal of the isolator.
    • Connect the accessory battery to the other terminal.
    • Ground both batteries properly.
    • explains how voltage-sensitive relays (VSRs) work in marine systems.
  5. Run the Cables Use waterproof 6 AWG cables with shrink tubing for durability. Route them cleanly to avoid interference.
    • demonstrates cable upgrades and switch panel integration.
  6. Test the System Start your engine and check voltage readings with a multimeter. The isolator should allow charging of both batteries while preventing drain.
    • includes battery relocation tips and system testing.

After the season we will be rewiring our chargers also and will be contacting you to make custom cables for us.

Thanks.

Livingston in Grand Cayman