Best Boat Shore Power Adapters of 2025

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Boat shore power adapters are essential for boaters who want to keep their vessels powered up while docked. These adapters convert the power from a dockside outlet into the correct voltage for the boat's electrical system. They come in a variety of configurations to fit different types of outlets and boats, and are made with durable materials to withstand the harsh marine environment. Some adapters also have built-in safety features to protect against electrical surges and other hazards. With a reliable boat shore power adapter, boaters can enjoy all the comforts of home while out on the water.
At a Glance: Our Top Picks
Top 10 Boat Shore Power Adapters
Marinco S30-15 Adapter
The Marinco Adapter is a high-quality, one-piece adapter designed for boating enthusiasts. It replaces the 81A and includes a power LED. With a 30 Amp 125V locking dock side/male plug and a 15 or 20 Amp 125V straight blade boat side/female connector, this adapter is perfect for those who need to connect their boat to shore power. It is similar in usage to Pigtail Adapters but without the sealing collars, so it is not recommended for use in wet locations. The Power LED makes it easy to see when you have power, and the one-piece design ensures durability and ease of use. Whether you're a seasoned sailor or a weekend boater, the Marinco Adapter is a must-have for any boating trip.
Marinco 305CRPN Male Plug
The Marinco 30A Male Plug is a great choice for boat owners who need a reliable shore power adapter. Its corrosion-resistant contacts and terminals ensure that it can withstand the harsh marine environment. The yellow nylon body is not only durable but also easy to spot in low light conditions. The ribbed design provides a secure grip, making it easy to plug and unplug. With a locking blade, you can rest assured that the plug will stay firmly in place, even in rough waters. Overall, the Marinco 30A Male Plug is a sturdy and reliable choice for any boat owner.
MECMO Marine Shore Power Y Splitter SS2-50P Male 50A Plug to (2) 30A L5–30R Female - 3FT
MECMO Y Splitter allows you to power two boats simultaneously from one power source. The locking rings and collars prevent moisture intrusion, making it ideal for marine use. The 50A male plug and dual 30A female connectors ensure stable power distribution. This UL Listed cord is durable with heavy-duty marine-grade cable. It's perfect for RVs, boats, and yachts needing reliable shore power.
RVMATE 15AMP to 30AMP Adapter
The RVMATE Shore Power Adapter is designed for boaters who need a reliable connection. This 18-inch cord converts a 15AMP NEMA plug to a 30AMP locking female outlet, ensuring compatibility with various shore power systems. The 10-gauge wire is made of 100% copper and features a weather-resistant PVC jacket, making it suitable for outdoor use. With a molded plug and connector, you can trust in its durability and safety. An LED power indicator light provides visual confirmation of power, giving you peace of mind while you enjoy your time on the water.
Marinco 157AY Marine Power Adapter
The Marinco Marine Adapter is a versatile solution for splitting one dock side receptacle between two boat inlets. With a 30 Amp 125V Locking Dock Side/Male Plug and two 30 Amp 125V Locking Boat Side/Female Connectors, this adapter allows for connecting boats with similar or different power configurations. The fully molded design, along with Marinco's unique sealing collar and covers, ensures safe usage in wet locations. This adapter simplifies your power connections and provides flexibility for your boating needs.
MECMO Marine Shore Power Dogbone Adapter
The MECMO Shore Power Adapter is a versatile and reliable solution for powering your boat, RV, or marine equipment. With its SS2-50P male plug, it allows you to connect to a 50A power source and transfer power to the L5-30R female receptacle. This adapter is designed for use with RVs, boats, and marine shore power inlets on pedestals. The SS2-50P plug features a locking ring, ensuring a secure connection. The L5-30R female connector also has a locking ring, providing added safety. The adapter comes with a 30A locking power cord, which features threaded locking rings on both ends to prevent moisture intrusion. Made from heavy-duty flame and heat resistant PVC cord, this UL listed adapter is durable and reliable. It is tested to meet UL and cUL standards, ensuring excellent and stable conductivity. With the MECMO Shore Power Adapter, you can easily and safely power your boat or RV using a 30A L5-30 extension cord connected to a 50A Marine SS2-50 shore power outlet. Perfect for use at yacht or RV marine-style power inlets on pedestals.
Marinco Pigtail Adapter, 30A 125V Female To 15A 125V Male
The Marinco 104SPP Pigtail Adapter is a fully molded adapter that allows you to connect from one dockside receptacle to one boatside inlet or equipment of a different power configuration. It features a 15 Amp 125V Straight Blade with Locking Screw Dock Side/Male Plug, 30 Amp 125V Locking with Sealing Collar System Boat Side/Female Connector, Marinco unique sealing collar, covers for use in wet locations, LED power indicator, contoured grip, and thumbprint ground blade locator. This adapter is perfect for those who need to connect to a power source with a different power configuration.
ADCAUDX 30-Amp to 15-Amp Adapter Cord
The ADCAUDX Adapter Cord is designed to connect your RV or marine equipment to standard household power outlets. This heavy-duty cord features a 15 Amp male plug that easily connects to a 30 Amp female receptacle, ensuring secure and reliable power transfer. With its twist-lock design, you can be confident that the connection will remain stable, even in challenging conditions. The 10AWG construction allows for maximum power handling, making it suitable for charging your RV or marine devices effortlessly. This adapter cord is perfect for anyone needing a convenient solution to access power while on the go.
MECMO 2X L5-30P to SS2-50R Adapter
The MECMO Shore Power Adapter is designed to connect two 30A L5-30P plugs to a single 50A SS2-50R outlet, making it ideal for charging larger boats, RVs, or marine equipment. With its dual male connectors, this adapter allows you to utilize available power sources efficiently, ensuring you have the power you need. The heavy-duty construction, featuring robust copper wiring, guarantees safe and reliable power delivery. Additionally, the waterproof design and locking connectors provide peace of mind, making it suitable for marine environments and ensuring secure connections at all times.
ADCAUDX 30 Amp to 20 Amp Adapter
The ADCAUDX Power Adapter is designed to make your RV, boat, or generator connections easier and more efficient. It features a 30 Amp male plug that securely locks into a 20 Amp female outlet, ensuring a reliable power supply. You can safely use this adapter with a maximum of 125 volts, making it perfect for various applications. Its compatibility with both 15 Amp and 20 Amp household outlets means you can connect to more power sources, providing versatility for your power needs. With this adapter, you can enjoy the convenience of seamless power access while on the go.
Frequently Asked Questions (FAQs)
1. Can you add shore power to a boat?
Yes, it is possible to add shore power to a boat. Smaller boats without a built-in shore power charger can easily be connected via a standard extension cord.
2. What voltage is boat shore power?
Boat shore power typically operates at 120 volts. In the US, 30 amp shore power provides 3.6 kilowatts of energy for vessels under 60 feet. Larger vessels often require 50 amp shore power for their energy needs.
3. How do ships connect to shore power?
The process of connecting a ship to shore power involves arriving in port, connecting power and control cables, and synchronizing the last running engine with the landside power grid.
4. How do you charge a boat battery without shore power?
If shore power is not available, there are alternative ways to charge boat batteries. The most common method is using the boat's alternator, which charges the batteries while the engine is running.
5. How many amps do I need for shore power?
The amperage required for shore power depends on the specific electrical system of the boat. RVs, which connect to shore power, typically use either a 30 amp or 50 amp electrical system.
6. Is shore power 120 or 240?
Shore power can be either 120 volts or 240 volts, depending on the specific receptacle. A 30 amp receptacle is typically 120 volts, while a 50 amp receptacle is 240 volts.
7. Does shore power charge your batteries?
When connected to shore power, the AC power is converted into DC power using a power inverter. This DC power is then used to charge the batteries on the boat.
8. Where do we connect shore supply?
The connection box for shore supply is usually located at the entrance to the accommodation or in the emergency generator room. It should have suitable terminals to accept the shore supply cable and an earthing terminal to ground the ship's hull.
During our boat shore power adapter research, we found 24 boat shore power adapter products and shortlisted 10 quality products. We collected and analyzed 9,186 customer reviews through our big data system to write the boat shore power adapters list. We found that most customers choose boat shore power adapters with an average price of $69.78.
The boat shore power adapters are available for purchase. We have researched hundreds of brands and picked the top brands of boat shore power adapters, including Marinco, MECMO, RVMATE, ADCAUDX. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Jason Kiser is an editor who lives in California, he previously worked in a travel agency for ten years, which enabled him to travel a number of interesting countries and experience several different cultures along the way. His range of job and travel experiences grant him expertise in hiking, camping, outdoors and fitness.