Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 15-09-2017, 10:14   #1
Registered User

Join Date: Mar 2013
Posts: 4
12v vs 6v in 2nd bank

I need to replace the batteries in the 2nd bank on my Catalina 34. As purchased used, it came with four 6v batteries wired in series/parallel. What are the pros/cons of replacing as is, or switching to four 12v batteries wired in parallel?

TIA,
Woody
San Diego
__________________

woodysca is offline   Reply With Quote
Old 15-09-2017, 13:03   #2
Registered User
 
atmartin's Avatar

Join Date: May 2010
Location: US East Coast
Boat: Mauritius 43 Sloop
Posts: 209
Re: 12v vs 6v in 2nd bank

Well it depends on the quality of the batteries used. Sounds like these four 6v batteries are your house bank. Are they Trojan T-105s or similar? Golf cart batteries are well-suited to house bank, deep cycle use.

I would keep the same battery type unless you'd like to switch from wet-cells to some kind of newer gel, agm or whatever. Otherwise you're going to need to make up new battery cables and maybe rearrange your battery trays to fit some kind of 12v.
__________________

atmartin is offline   Reply With Quote
Old 15-09-2017, 13:38   #3
Registered User

Join Date: Jan 2017
Posts: 9,559
Re: 12v vs 6v in 2nd bank

Nothing beats 6V GCs for value.

So many 12V are fraudulently labeled.

If you want to go 12V, post the specific mfg & model for feedback
john61ct is online now   Reply With Quote
Old 15-09-2017, 13:54   #4
Registered User
 
Peregrine1983's Avatar

Join Date: Aug 2016
Posts: 699
Re: 12v vs 6v in 2nd bank

+1 for keeping the 6v's if they are golf car batts for the house bank. I have been very happy with mine.

Sams's club has them cheap if you have one out there. If you're not a member they have a guest membership pass that you can use for a day. That's what I did.

https://www.samsclub.com/sams/golf-c...ies/3990117.cp
Peregrine1983 is offline   Reply With Quote
Old 15-09-2017, 14:45   #5
Registered User

Join Date: Jan 2017
Posts: 9,559
Re: 12v vs 6v in 2nd bank

Also at Batteries+, make sure to get FLA not sealed!

Actually made by East Penn (Deka) great mfg.

But Trojan T-105s are better, RE variant even more so.
john61ct is online now   Reply With Quote
Old 15-09-2017, 15:57   #6
Registered User

Join Date: Mar 2013
Posts: 41
Re: 12v vs 6v in 2nd bank

I have an RV, an interim vehicle until I find my dream boat, and this is a hot topic on RV forums as well. Personally, I have two 12 volt batteries wired in parallel, and they have provided ample power for my needs. However, the general gist of discussions I've read is that using 6 volt deep cycle batteries, i.e. golf cart batteries, will provide a stronger battery with longer life for the same amount of money spent on comparable 12 volt batteries.
desertsailor is offline   Reply With Quote
Old 15-09-2017, 17:34   #7
Registered User

Join Date: Jan 2017
Posts: 9,559
Re: 12v vs 6v in 2nd bank

Often **much** longer life, and for less money.
john61ct is online now   Reply With Quote
Old 16-09-2017, 04:54   #8
Senior Cruiser
 
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: 34,022
Images: 240
Re: 12v vs 6v in 2nd bank

Greetings and welcome aboard the CF, Woody.
__________________
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 online now   Reply With Quote
Old 16-09-2017, 05:53   #9
Registered User

Join Date: Nov 2015
Location: Fl
Boat: Wauquiez Hood 38
Posts: 1,153
Re: 12v vs 6v in 2nd bank

What is the "RE variant" mentioned?
__________________
Keth

Boat Vinyl Lettering and Graphics
Bleemus is offline   Reply With Quote
Old 16-09-2017, 12:06   #10
Registered User
 
wolfesmy's Avatar

Join Date: Mar 2013
Location: Winnipeg Manitoba Canada , Florida, Bahamas
Boat: Morgan 383, C&C 34, Kirby 25
Posts: 83
Re: 12v vs 6v in 2nd bank

6v any day. More amp hrs/$ and longer life.
Have both of my big boats house banks fitted for 6V. 12V for starter only.
Never run out of power yet.
Though as with any bank don't let them get below 50% as that shortens life.
wolfesmy is offline   Reply With Quote
Old 16-09-2017, 12:28   #11
Registered User

Join Date: Mar 2013
Posts: 4
Re: 12v vs 6v in 2nd bank

A BIG thank you to all who responded !
I'll research 6v golf cart batteries to see if I can find a size similar to what is there
(Trojan 125)

regards,
Woody
woodysca is offline   Reply With Quote
Old 16-09-2017, 13:20   #12
Registered User

Join Date: Oct 2014
Location: Panama City Beach, FL
Boat: Beneteau 343
Posts: 244
Re: 12v vs 6v in 2nd bank

I have had good luck with Interstate 6v GC batts. And they give good service should there be a problem.
EmeraldCoastSailor is offline   Reply With Quote
Old 16-09-2017, 14:12   #13
Registered User

Join Date: Jan 2017
Posts: 9,559
Re: 12v vs 6v in 2nd bank

Interstate does not make any batteries, they are a marketing/distribution brand, also supply Costco. I believe all their FLA are made by Johnson Controls. Not saying "bad", but the Duracell/Deka are more robust and last longer, better value for money. Then Trojans, a step up but a bit pricier.

You can keep going up the ladder, to Rolls / Surrette at the top.

With the top-notch vendors like that, they can be trusted to properly differentiate their "true deep cycle" from "dual purpose" starters, even in 12V models.

But they are more expensive, a huge step up in quality from what most people are willing to pay for.

So, it's not that 6V (or 2V, or 3, 4) is inherently better than 12V, it's just that at the bottom of the market, within consumer and automotive retail channels, the vendors all lie, and only the 6V FLA golf car batts are actually designed for deep cycling.
john61ct is online now   Reply With Quote
Old 16-09-2017, 14:14   #14
Registered User

Join Date: Jan 2017
Posts: 9,559
Re: 12v vs 6v in 2nd bank

Quote:
Originally Posted by Bleemus View Post
What is the "RE variant" mentioned?
Stands for Renewable Energy.

Google T-105-RE or shop around from local Trojan dealers and you'll see, usually quite a bit pricier than the regular version.
john61ct is online now   Reply With Quote
Old 16-09-2017, 14:31   #15
Registered User

Join Date: Dec 2014
Location: the Med
Boat: Nauta 54' by Scott Kaufman/S&S - 1989
Posts: 1,168
Images: 3
Re: 12v vs 6v in 2nd bank

Trojan 125 PLUS are my choice. They use T2 technology (carbon?)

in europe, most use 12V. I had to fight a bit Before finding 6V deep cycle.

Cranking 6 batteries into the same basket, other than 3, comes at a cost... (thinner plates, more. Foamy compound, lighter mass)
__________________

TheThunderbird is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
6V bank to replace 12V bank silversailor Electrical: Batteries, Generators & Solar 50 02-06-2013 16:38
12V bank + 24V bank? andreas.mehlin Electrical: Batteries, Generators & Solar 6 31-08-2012 09:28



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:55.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.