Category Archives: Easy Add AC Shore Power

Shore Power Battery Charging

Dear Boat Wiring Guys,

I am looking at your complete shore power system and it seems to be perfect for my boat.

Catalina 27

Could you please me if this is a 30 amp system or a 15 amp system?

Also, Does your unit come with some connection to the battery so that the batteries are charging while pluged into the shore power? I want to be charging my boat batteries while I'm plugged into shore power.

I have a 27 Catalina sailboat that has an outboard motor. The only thing the batteries provide power to are the stereo, interior cabin lights, running lights, ship to shore radio, etc. It does not power the outboard.



It is actually a 20 amp system.

The inlet is a standard Marinco 30 amp inlet that works with any 30 amp twist lock cordset. The main breaker is a 20 amp dual pole. All outlets and wiring are rated at 20 amps or higher.

To charge your batteries, simply plug in a marine grade battery charger to either one of the remote outlets or one of the outlets on the back of the panel. When the shore power cord is connected, the battery charger will be charging.

The battery charger is not included.

Hope this helps,


Boat Battery Charger Plug

Dear Ez,

I am going to be adding shore power to my boat wiring and I think your Complete Shore Power System will be perfect for my setup.

My question is about adding a battery charger after I install your product.

Boat battery charger plug

I’m planning on installing to add a ProNautic 1220P Series 20 amp on board dry mount battery charger on my boat. But, it does not come with an AC power cord with a traditional three prong plug. How would I connect it to your system given it only has traditional power outlets? Do you make an adapter?

My goal is to be able to run the DC system (lights, stereo) off the charger which will be hooked up to my new AC power source… everywhere I’m reading says that a dry mount charger is the way to go but these typically do not come with wiring that has the three prong plug the way a wet mount charger does.

Thanks for your help.


The simplest solution is to use an AC pigtail style cord when you connect AC to your charger

It will have a three prong plug on one end and bare wares on the other. If you cannot locate one at your local home improvement store, this is basically a 16 AWG extension cord with the female end cut off. With this cord, the charger can be hard wired at the charger and simply plug into the your new shore power outlets.

Hope this helps, Kevin

Shore Power Outlets

Hi Ez,

Last summer, I bought and installed your simple snap together shore power kit on my 24' Bayliner boat. It works and looks great.

Bayliner 24 Trophy

For the upcoming season, I need one of your remote outlets that snap into the back of the breaker box.

What is a safe length for this remote mount? I have only a 15 amp system. The outlet will mount in top of galley counter for miscellaneous applications. I also want to run another outlet about 8 ft to use for wall mount small flat screen. 

Was looking for a link to what you have ready to ship. Or do you need to special order them?



We don't list the remote outlets as a separate item, but we often sell them.

They come with the black mating plug that matches the one's on the back of your panel on one end and an outlet on the other end. If you want 2 outlets, the second one will plug into the first one.

The standard length is 15' between the plug and the outlet.

Please let us know how you would like to proceed and we can deal with the order via email or phone.

Thank you,


Aussie Adapter

Hello Ez,

Our question concerns marine electrical shore power systems.

marine shorepower 50 amp plug configurations

Is it possible to connect 240 volt, 60hz boat wiring to the 50 amp 120/240v shore power supply in a marina?

We have been told it can be done and would like your opinion before we buy either a connector or a transformer. Our 240 volt power needs are not great, just a small hot water system, fridge, battery charger, and a couple of outlets.

Thanks for your time.


If your marine electrical system is a 240 volt, 60 hz, then connecting it to a 120/240v supply is fairly simple.

The 120/240 system is a 4 wire with an unbalanced ground wire (usually white). A straight 240 volt system doesn't have the unbalanced wire. Your system will only have a black, red, and green wires. It can be connected to a 120/240 source with this Marinco plug.

A 240 volt, 60 hz system is very rare on the US marine market. I don't think I have ever seen a boat wired like this before. If it is a 50hz system, the voltage will be correct, but the frequency will be wrong and your smarter devices may not work. If you are trying to plug normal, US AC devices into your outlets, the voltage will 240 instead of the normal 120.

Hope this helps,


Hello Kevin,

Thanks for your speedy reply.

We are Australian boaters, hence the 240 volt, 60 hz. Our AC bits and pieces on the boat are all 240 and need to get the battery charger going.

I will chase down a plug and give it a go.

Thanks again for your help. Keep well.


Before you wire it up, I would check with Australian wiring to see if they connect the neutral to ground at the source.

In the US, the AC neutral (white) is connected to the AC ground (green or bare) at the distribution panel. With 240v, there are two hot wires, black and red, and neither wire is connected to ground.

If your boat components are expecting the neutral to be connected to ground, then simply wiring in a 125/250v plug will not work.

I would do some more research on the ground side before connecting your Australian boat.

Damp Ground


I'm looking at your complete marine electrical shore power system, and it looks like the perfect solution to my needs.

22 Chrysler sailboat

My only concern is that I don't have an engine on my sailboat to use as a ground. Would using my metal keel work instead? I can access it in the bilge, my thought would be to use one of the keel bolts or drill and tap a bolt just for the ground. My concern with this location is that there generally is about 2-3 inches of water in the bilge / keelboat area, would this be a concern?

Thanks for your help is clearing this up.


I would connect the AC grounding wire to your boat's DC ground. This can either be a ground bus or directly to the negative terminal on your boat battery.

The purpose of the wire is to provide a path back to AC ground if there is a fault on the boat.

Hope this helps


Thanks for the quick response - however I neglected to mention I don't have a dc system on my boat.

Do I need one in order to install shore power?



A DC system is not necessary. Connecting the AC grounding wire to you keel will be fine.

Please let me know if you have any other questions.


Charger Ready?


I am very interested in your complete marine electrical shore power systems. I want to install it on my 24' Bayliner Trophy boat. It appears to be a really simple DIY boat wiring project.

I would like to know if you sell a battery charger to go along with your power system.Bayliner 24 Trophy I also would like to know if you recommend getting a galvanic isolation with this system?



Our AC kits were designed for the DIYer. They take what was once a complicated and expensive and make it a lot less of each!

They come with the AC panel and shore power inlet and depending on the model; one or two extra outlets. The back side of the AC panel enclosure has two outlets to allow you to connect a battery charger, refrigerator, or other built in items that you do not want to have plugged into your other outlets.

We do not sell battery chargers, but our system is ready to have one connected to it. If you buy a charger like one from Marinco, your connection will be as simple as plug the AC plug on the charger into the back of the AC panel before you mount it into your cabinet and connect the DC leads to your batteries.

As for the option to add a galvanic isolator...

If your marina is known for galvanic corrosion, I would recommend a galvanic isolator. On the other hand, if you use an "in and out" service or aren't mooring near other boats you may be fine without it.

Please let me know if you have any other questions,


Eight Switch Depth?

HI Kelly,

Thank you for all of your help configuring my new boat wiring system. I’m really looking forward to recieving my order.

Could you please tell me how deep the eight switch marine electrical panel is? It will be installed in one of two possible locations – and one is a bit tight in the back so wanted to plan ahead. Would it be possible to have Kevin email me back with the answer?EzAcDc marine electrical switch panel

Thank you again.


I would recommend a minimum of 2 1/2″ from the front face of your mounting surface to the rear of your enclosure.

The switch bodies are 1 1/8″ deep, the wire terminals are 7/8″, and I would not want to bend wires in a radius less than 1/2″.

Hope this helps,



Yes, this helps

Thanks for a quick response and please let everyone know that the shore power kit is great!

Sea Ray Shore Power


I am interested in one of your complete shore power systems, but I have a few questions…

I have a 2001 22′ Sea Ray Express Cruiser that has no shore power – and has dual batteries located in the engine compartment. I would like to add one of your systems as well as a Guest charger that would plug into the back of your panel.Sea Ray Boat

My question is…

How would I set up the boat wiring properly and safely? I know the panel would go into the cabin with the Marinco outlet somewhere near the rear of the boat. If the charger is plugged into the back of the panel and mounted nearby, how will the leads reach the batteries? Any recommendations?

Would a second outlet be recommended to solve this? Can an added outlet be placed outside the cabin on the deck or under the gunnel?



Our AC system was originally suggested by someone with the same boat that you have!

To plug in your battery charger you can either mount one of the remote outlets near the battery charger or use a high quality extension cord from the charger to one of the outlets on the back of the panel.

The GFCI on the front of the panel protects all of the outlets in the system, so if you chose to install one of the remote outlets in the engine room it would be protected.

My preference is the extension cord method. It keeps your remote outlets for easier to access areas and out of the bilge.

Hope this helps,


Shore Power OK In Canada?

Hi Kevin,

I am considering adding your shore power system to my boat wiring. Canadian flag

But, before I do, could you please tell me if your system will work in Canada?

Thanks for your help.


Yes. Our complete system will work well for you. Canada uses the same 120v 60hz system as the US.

Please let me know if you have any other questions,


Baja Needs Thirty Amp AC System


Yes, I’m interested installing your complete marine electrical shore power system in my 1998 Baja 33 Outlaw.

Is it a 30 amp system? Is there enough wiring included to install in my boat? I want to install a battery charger as I have an existing 12 volt DC system and panel installed. Do you sell or recommend a battery charger for three batteries?Baja 33 Outlaw



Our hull inlet is made to accept a 30 amp cordset, but the main breaker on the panel is a 20 amp. This breaker protects the 20 amp GFCI and all of the outlets in the system.

The AC panel has two outlets on the rear of the panel that work great to plug in a battery charger or a built in refrigerator. If your devices are too far away, you can use our remote outlets. They come with a 15 foot cord that plugs into the rear of the AC panel assembly. If you get two remotes, the second one plugs into the first one to allow up to a 30 foot run from the AC panel assembly.

We do not sell battery chargers. I usually recommend Guest and Mastervolt battery chargers. The Guest for their waterproof features and the Mastervolt for their true output ratings.

Hope this helps,