From 120V to 240V: What Does It Take to Convert a Boat’s Electrical System for a Different Country?

Converting a U.S.-built sailboat’s electrical system for U.K. cruising took more than changing outlets.

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Even the smaller components add up. Alongside the batteries, inverter, and other major equipment, there were plenty of connectors, terminals, and fittings to buy along the way. (Photo/ Pippa Shaw)

When we bought Avatar, our 45-ft. aluminum sailing yacht, in November 2025, we knew we were taking on a substantial refit. But we hadn’t fully appreciated how much thought it would take to replace her electrical system.

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Pippa Shaw
Pippa is a marine writer, editor, and storyteller who has lived aboard her 29ft sailing yacht with her partner and Opie the boat cat since 2018. She is currently refitting a 45ft aluminium offshore cruiser, with plans to complete her UK circumnavigation before setting her sights on longer-distance adventures. Combining hands-on cruising experience, refit knowledge, and years of marine industry insight, Pippa specialises in exploring the stories, design decisions, and details that make every boat unique.