Common Ground MarineCommon Ground Marine

    Shore Power

    Stainless inlets, marine-grade cordsets, ELCI breakers, and adapters in 30A and 50A.

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    Choose your path

    This collection is a selected range. For the wider selection, browse all Shore Power parts.

    Everything you need from the shore pedestal to the boat's main panel — stainless inlets, locking cordsets in standard and twist-lock styles, ELCI main breakers, smart-Y adapters, and pigtails. All hardware is corrosion-resistant and rated for wet locations.

    30A vs. 50A — which shore service do you need?

    If you can run your AC, water heater, and battery charger at the same time without tripping the breaker, 30A is fine. If anything bigger than a single AC unit is on the load list, plan on 50A — and an ELCI main breaker either way.

    Read the 30A vs. 50A guide

    Shore service at a glance

    ServiceVoltageTotal powerTypical loads
    30A / 125V125V3,600 WCharger + 1 AC
    50A / 125V125V6,000 WCharger + 1–2 AC
    50A / 125-250V125/250V12,000 WMultiple AC + galley

    ABYC-compliant from inlet to main breaker

    Every shore power kit we ship lines up to ABYC E-11. We pair inlets with the matching ELCI breaker, supply hardware in stainless throughout, and document the recommended wire gauge for the inlet-to-panel run.

    • ELCI breaker recommended on every install
    • Stainless and corrosion-resistant hardware
    • Wire gauge worksheet included with every kit

    Technical support

    Not sure which one fits your build?

    Our marine electrical team can compare options against your boat, helm layout, and circuit list — so you order the right part the first time.

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    Frequently asked questions

    Do I need an ELCI breaker?

    Yes — ABYC E-11 calls for an ELCI main breaker on every shore-powered AC system. We always include the matching ELCI in our shore power kits.

    How long should my cordset be?

    Plan for the longest dock you'll regularly tie up at, plus 10 feet of slack. Most cruisers carry a 25 ft and a 50 ft to cover both.

    Can I split a 50A pedestal into two 30A circuits?

    Yes, with a smart-Y adapter rated for the load. We stock locking smart-Y units that share the 50A pedestal between two 30A boats.

    Shipping & returns

    • Stocked items typically ship the next business day from our US warehouse.
    • 30-day returns on unused stocked items. Exclusions apply. See policy
    • Custom and quoted items are non-returnable once production begins.

    Certifications & training

    • ABYC-aware build practices
    • OEM-grade marine wire & terminals

    Additional capabilities are based on hands-on experience building marine wiring systems rather than third-party certification.

    Brands we carry

    Why work with our team

    Marine electrical experience behind every part we ship.

    • Picked for marine use

      We carry parts that hold up in salt, vibration, and heat — and we'll tell you when a cheaper option will give you trouble.

    • Real engineering review

      Send your circuit list or layout and our team will sanity-check wire sizes, breakers, and connectors before you order.

    • Direct support

      Talk to the team that builds custom harnesses and helm panels for boat builders, dealers, and refit yards.

    Ask about your project