Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 09-07-2009, 11:31   #1
Registered User

Join Date: Jul 2009
Location: Chicago
Boat: Pearson 30
Posts: 1
Question Need Advice: Temporary Shore Power

I have a Pearson 30 that is kept on a mooring and used for day sailing. I have a 30 amp alternator on the engine that does a good job keeping the batteries charged throughout the season and I have a 10 amp Black & Decker battery charger I use in the off season to keep the batteries (2 group 24 deep cycle/cranking wet cells) topped off.

I'm planning on taking a weekend trip to another port about an eight hour sail away, so I'll be drawing power for a lot longer than usual. At the other port I'll have access to shore power, but my boat does not have any shore power connections. Since this is something I'll probably only do once a year, I don't want to go through the expense of installing a shore power system on the boat.

At the other harbor I'd like to be able to charge my batteries using shore power, and if possible, also charge the batteries in my laptop from AC. My battery charger is not designed for outdoor or marine use, and the harbor, of course, has a standard 30 amp connector.

Does anyone have an recommendations on how I can charge the batteries off shore power? I'd like to be able to do this safely without having to spend a lot of money.

jhlight is offline   Reply With Quote
Old 09-07-2009, 11:44   #2
Registered User
redcobra's Avatar

Join Date: Mar 2009
Location: Towson, MD Chesapeake Bay
Boat: Pearson 39 Yawl "ZigZag"
Posts: 516
Get a shore power to standard plug adapter (or buy a plug and wire it yourself) and use a heavy extension cord to a breaker protected power strip to your B&D charger and laptop..

redcobra is offline   Reply With Quote
Old 09-07-2009, 11:50   #3
Senior Cruiser
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 17,160
Yep, what he said!
Cheechako is online now   Reply With Quote
Old 09-07-2009, 14:55   #4
Registered User
Strygaldwir's Avatar

Join Date: Dec 2004
Location: Deale, Maryland
Boat: SeaView - Privilege 37
Posts: 1,019
Images: 5
Dang nabit, I do LOVE a practical, reasonable ($$$) response. Oh, I know! Get the adapter on eBay! probably a better price, but make sure you know what the internet retail for such is prior to eBay, and don't go over that price!
Strygaldwir is offline   Reply With Quote
Old 12-07-2009, 22:52   #5
Commercial Member
CharlieJ's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Petersburg, FL
Boat: Gulfstar Long Range Trawler; 53'; BearBoat
Posts: 811
The responses to the question are good...I just did the mod for a friend's boat. The 30 amp Marinco male end retails for about $20 at West Marine and I cut off the male end of the extension cord and installed the Marinco.

However, I would be remiss if I did not caution you about using an automotive battery charger on board a boat. Most of them tie the neutral to the safety ground at the transformer in the charger, which can lead to problems should a fault occur in the charger that could be reflected in your DC system. The charger is an interface between shore AC and vessel DC. A properly wired marine rated charger able to meet your modest requirements should cost less than $100.

One other problem with your automotive type charger is the lack of over current protection in the B+ output from the charger. Many quality marine rated chargers are "self limiting" and do not require the OCPD.
Charlie Johnson
JTB Marine Corporation
"The Devil is in the details and so is salvation."
CharlieJ is offline   Reply With Quote

shore power

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
shore power kenpatt Electrical: Batteries, Generators & Solar 8 20-05-2008 12:50
Shore power problem viking69 Electrical: Batteries, Generators & Solar 6 18-12-2007 18:57
Shore Power Crak Electrical: Batteries, Generators & Solar 24 05-07-2007 02:41
Testing AC Shore Power GordMay Electrical: Batteries, Generators & Solar 10 27-05-2006 04:17
adapting shore power captjohn360 Construction, Maintenance & Refit 6 09-02-2005 23:13

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:51.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.