Collection: Shore Power

Connecting your boat to dock power involves more variables than a single cord and outlet. Amperage is the first decision: smaller vessels typically run on 15- or 30-amp service, while larger powerboats and liveaboards often need 50-amp or even 100-amp connections like the heavy-duty Marinco four-pole shore power cables stocked here. Voltage matters too, particularly if you are running 120/208V three-phase service or need a pigtail adapter to bridge mismatched pedestals. SmartPlug connectors use a blade-style locking design that differs from standard twist-lock fittings, so verify compatibility with your inlet before ordering. Marinco extension cords come in 25- and 50-foot lengths, and the lighted versions make it easier to confirm a live connection at night.

Beyond the connection itself, consider what else runs through your shore power system. Mastervolt isolation transformers protect against galvanic corrosion by breaking the electrical bond between dock wiring and your boat's hull, a worthwhile addition for boats that spend significant time at a marina. Stainless steel inlets from SmartPlug and Marinco hold up better in saltwater environments than standard chrome fittings. If your slip also has cable TV or internet service, Marinco makes dedicated inlets for those connections as well, keeping everything tidy and watertight at the dock.