Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 30-06-2005, 11:19   #1
Moderator Emeritus
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 29,337
Images: 240
Tutorials ...

Some interesting tutorials at:
The Learning Center
~ Cruising Considerations:
~ What are Amp Hours:
~ Calculate 12 volt Requirements:
~ Wind Generator Comparison:
~ High Output Alternators:
~ For the easiest way to charge your starter battery read the Simpler Solution:

Fourwinds Enterprises, Inc
1205 Elizabeth Street, Punta Gorda, FL 33950
N 26̊ 55.6685 x W 082̊ 02.6963
Telephone: 941- 575 - 4404
Fax: 941- 575 - 4080

Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is offline   Reply With Quote
Old 01-07-2005, 10:32   #2
Registered User

Join Date: Jun 2005
Posts: 14
i like the simplicity of just a diode for charging the starter battery from the house battery but i don't like the idea of if the alternator fails and your out to sea it seems that both banks of batteries will be drained. i would want something that would totally isolate each bank unless the alternator was putting out.

davemaskell is offline   Reply With Quote
Old 01-07-2005, 11:48   #3
Registered User

Join Date: Jul 2005
Location: Punta Gorda, FL
Posts: 1
Dave, I am not sure why a failed alternator would cause both banks to drain if your alternator died. You have to throw the bypass switch if you want to use your house bank to start the engine. Remember if you're out cruising you will most likely have wind, solar and/or a diesel generator to supply juice to your house bank.

Please let me know your thoughts as I am curious if there is something I am missing - which is always a possibility !
Paul Marcuzzo
Speranza - Lagoon 410
paulmar is offline   Reply With Quote
Old 01-07-2005, 16:43   #4
Senior Cruiser
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Somewhere along the US West Coast
Boat: Modified Choate 40
Posts: 10,469
Images: 122

A better alternitive to the diode is a combiner. I use one for my windless battery up fwd and it stays up all the time. There is no draw unless the the altenator is putting out. With a diode a low battery on the down side will draw from the up side. Id=10001&productId=5461&keyword=143268&y=14&x=17&s toreId=10001&ddkey=SiteSearch

Not advertising for WM, just an idea of cost and a larger unit.
delmarrey is offline   Reply With Quote
Old 02-07-2005, 00:54   #5
Registered User

Join Date: Jun 2005
Posts: 14
paulmar your right. i was worried about the diode connectiing across both banks but i can see now that the diode would block the discharge of the starter battery. the nicest system i've installed in the past is one that has a solenoid that only energizes when the main batteries are showing charged. it then closes the solenoid and charges the other bank hooked up with the solenoid. when the main bank loses a certain set voltage,say 12.5v, it disconnects the solenoid. the nice thing about this is there is no voltage drop in the curcuit unlike a alternator splitter.
davemaskell is offline   Reply With Quote

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

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 22:55.

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.