Advantage 6V Series vs 12V Parrallel Bank - 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 > Electrical Systems
 Not a Member? 
  #1  
Old 08-30-2011
John
 
Join Date: Jul 2011
Location: Hampton Roads, VA
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Wanderer2011 is on a distinguished road
Advantage 6V Series vs 12V Parrallel Bank

Ok, what is the Pro's/Con's of 6V Series or 12v Parrallel Battery bank setup, other than price.

Looking at this:
Bank 1: 2 T-125 (6v) in Series 240AH total

or

Bank 1: 2 SCS200 (12v) in Parrallel 230 AH total

Second bank will be built later with the same configuration as Bank 1
BMV600 will monitor Bank 1.
Xantex battery charger will be setup to charge both battery banks, through EchoCharger
One bank will be on Port side (1) the other STarboard side (2).

I have a load plan for the electrical an this will meet my needs, and I'll be using the bank to start a M18 diesel engine.

Thanks in advance.
Reply With Quote Share with Facebook
  #2  
Old 08-30-2011
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,401
Thanks: 0
Thanked 17 Times in 17 Posts
Rep Power: 9
night0wl is on a distinguished road
If you can only fit 2 batteries, then I would go with a Bank of the SCS200 (12v) in parallel.

Here is the reason. If you're using this as your one and only bank, and a single cell goes bad (which ruins the battery that the cell is in), then in your first setup (6v in series), you will lose the *ENTIRE* battery bank as most electronics require 12v.

In a 2 x 12v battery in parallel setup (your second scenario) if you lose a battery due to a bad cell, at least you have 1 additional battery that is capable of putting out 12v allowing you to limp home. Sure your capacity is diminished, but this is an emergency situation...and a prudent sailor tries to prepare.

Ideally, in a long term cruising scenario, I would have 4 x 6v batteries wired in series/parallel. This would give me 2 x 12 banks totalling ~400 amp hours. This is a lot of weight and the cabling and charging equipment can be expensive and require upgrades, as well as the ongoing battery maintenance....however I would have the most peace of mind with that setup that my bank(s) can provide the capacity and redundancy I seek.
__________________
S/V Jendai
Beneteau 343

Last edited by night0wl; 08-30-2011 at 01:10 PM.
Reply With Quote Share with Facebook
  #3  
Old 08-30-2011
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,071
Thanks: 0
Thanked 68 Times in 59 Posts
Rep Power: 7
mitiempo will become famous soon enough mitiempo will become famous soon enough
While the above post is true, the 6 volt "golf cart" type batteries have thicker plates and will outlast most 12 volt batteries by quite a large margin.

A good solution would be a bank of two 6 volt golf carts in series (or 4 in series/parallel) and a separate 12 volt battery for engine starting or emergency use.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #4  
Old 08-30-2011
Senior Member
 
Join Date: Aug 2006
Location: Arlington, VA
Posts: 1,809
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 10
btrayfors will become famous soon enough btrayfors will become famous soon enough
+1 what Brian said.

Also, don't wait too long to get the second bank. And, when you do, consider linking them all together as one big house bank. With a separate start battery, as Brian suggested, maintained by an EchoCharge.

Bill
Reply With Quote Share with Facebook
Reply


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
4 solar panels - series, parallel or series-parallel ArgleBargle Gear & Maintenance 1 04-26-2011 08:27 AM
The unthought advantage of a wing keel KindOfBlue General Discussion (sailing related) 4 07-25-2009 06:19 PM
Boat as Second Hone Tax Advantage? CapnSantiago General Discussion (sailing related) 20 07-24-2007 10:07 PM
Sailing: Britons must consolidate advantage (Daily Telegraph) NewsReader News Feeds 0 01-26-2007 08:15 PM


All times are GMT -4. The time now is 03:54 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.