Isolated battery's forward for specific tasks... - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 04-28-2012
souljour2000's Avatar
Senior Member
 
Join Date: Jul 2008
Posts: 601
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
souljour2000 is on a distinguished road
Isolated battery's forward for specific tasks...

Does anyone use "dedicated "batterys" in isolated areas...that are independent from the main charging banks...For example.. I want to do a conversion of my vee-berth from two bunks that are old-fashined hi-lo into a normal vee-shaped wide bed...this allows my salon dinette to be a dedicated salon dinette for eating/sitting/enetertaining which is what I want...BUT...my vee berth as my primary sleeping area will not have good ventilation as there is no hatch or dorade boxes up that way...so I might install one or two 12v fans up there. I hate to run a circuit all the way from the batteries in the stern quarterberth areas though...I'd rather maybe have a deep cycle 12-v batt sitting up in the bow or vee-berth area down low somewhere that is charging off a solar panel above to run the fans...and occasionally an anchor winch ..It would not be connected to the main house batteries ...or could be but only if I flicked a gate switch.

Not as simple a system but I'm thinking if I integrated it normally the wire from the house batt up to the fans would have to be thick and long and the voltage drop would be fairly large since its a forty-foot boat...not good.
This "isolated, dedicated, vee-berth battery might also be serve a dual-purpose to run an anchor winch as mentioned (though would have to be full charge when doing so and so maybe I could just remove it from mount and drag it back to be charged by onboard generator and 50 amp charger)...so it would serve two tasks one...low amp draw..one high amp draw for winch...shorter localized run would help the high-amp winch amp draw when employed...rest of time...it need only serve a low-amp draw to the 1-2 12v fans I'd be using every night (florida summer)...

Last edited by souljour2000; 04-29-2012 at 12:50 AM.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 04-28-2012
souljour2000's Avatar
Senior Member
 
Join Date: Jul 2008
Posts: 601
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
souljour2000 is on a distinguished road
Re: Isolated battery's forward for specific tasks...

Too much of a hassle isn't it...In retrospect...it's better to just make the runs...with bigger gauge wire and live with it i think...discuss
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 04-28-2012
Senior Member
 
Join Date: May 2007
Posts: 647
Thanks: 3
Thanked 4 Times in 4 Posts
Rep Power: 8
Siamese is on a distinguished road
Re: Isolated battery's forward for specific tasks...

Sounds like waaaaay more hassle than simply running the fan wires back to your main battery bank.

Yeah, it'll have to be a heavy wire, but just base it on the load of the fans and the distance traveled.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 04-28-2012
msmith10's Avatar
Junior member, rest old
 
Join Date: Feb 2009
Location: Columbus Ohio
Posts: 492
Thanks: 3
Thanked 0 Times in 0 Posts
Rep Power: 6
msmith10 is on a distinguished road
Re: Isolated battery's forward for specific tasks...

It could make sense for powering a windlass, but not for a couple of fans.
__________________
Mark Smith
1977 C&C 30 Mk 1 hailing from Port Clinton, Ohio
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 04-29-2012
souljour2000's Avatar
Senior Member
 
Join Date: Jul 2008
Posts: 601
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
souljour2000 is on a distinguished road
Re: Isolated battery's forward for specific tasks...

Quote:
Originally Posted by msmith10 View Post
It could make sense for powering a windlass, but not for a couple of fans.
Yeah...for the windlass..not for the fans...those are easy i realize now...if I can find some good low-draw fans...it would be no big deal to wire them normally..

the windlass though is the bugger in the bunch with it's high amp draw...i wonder if a dedicated batt for it is probably somewhat common amongst cruisers ???...

Last edited by souljour2000; 04-29-2012 at 12:55 AM.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 04-29-2012
hellosailor's Avatar
Senior Member
 
Join Date: Apr 2006
Posts: 10,802
Thanks: 2
Thanked 97 Times in 94 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Isolated battery's forward for specific tasks...

souljour have you done your math?

An 80-foot round trip wire run powering 2 amps for the fans would be satifactory with 12AWG wire, no big deal. Not knowing what fans you have, I can only suggest you run the numbers.

Windlasses are something else entirely.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 04-29-2012
TRMN8R's Avatar
Junior Member
 
Join Date: Jun 2008
Location: Colden, NY
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
TRMN8R is on a distinguished road
Re: Isolated battery's forward for specific tasks...

Or find some battery operated fans? As others have already said, way more work than it needs to be, extra weight, outgassing issues if not using sealed batteries, who wants to move them when they need to be moved? You can chase wire pretty much anywhere......hope this helps!
__________________
Ericson 27
Buffalo NY
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 04-29-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,230
Thanks: 0
Thanked 73 Times in 64 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Isolated battery's forward for specific tasks...

Souljour

As hellosailor said, 12 awg is fine for fans.

But - do you have any 12 volt interior lights forward? If so install a small terminal block at the end of the light feed and run wires from there to the fans.

As far as a windlass battery - moving a battery to charge makes no sense. And for a windlass the charging wires to a forward battery are almost as heavy a gauge as the wires run forward if using the main bank. Best to run the proper 2/0 or whatever wire and have one less battery to worry about.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
yearly maintenance tasks & costs for sailboat BostonSailor Gear & Maintenance 14 12-07-2011 12:15 AM
NOAA Electronic Navigational Charts - Display of Isolated Shoal Soundings poopdeckpappy General Discussion (sailing related) 0 05-04-2010 05:52 PM
Battery banks isolated - not cutterorient Gear & Maintenance 7 06-08-2009 01:16 PM
Isolated Compartments: A warning Triquetra Sailboat Design and Construction 3 09-14-2008 10:40 AM
Isolated Anchorages ianhlnd Cruising & Liveaboard Forum 19 07-16-2008 09:33 PM


All times are GMT -4. The time now is 03:08 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.