Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-24-2011, 08:33 PM   #1
retired USA/USAF

 
2001 30' Excella
Somerset , New Jersey
Join Date: Jan 2009
Posts: 2,209
What size battery to buy ???

I have an '85 Excella with the 2 battery compartments in the front with access through a door opening forward, over the "A" frame. At the moment I have 2 group 27's on board that are in need of replacing. Will my unit handle a larger group 31 battery ????? I was hoping to go just a bit larger for added battery uuuumph. I recently purchased and installed a new IOTA converter for some added peace of mind. I just don't think that I am in the market for a Lifeline battery just yet. Maybe next time. Today I stopped to check what Sears has to offer and they have both 27's and 31's in the deep cell RV batteries available.


Thanks all,
__________________

__________________
Roger in NJ

" Democracy is the worst form of government. Except for all the rest"
Winston Churchill 1948

TAC - NJ 18

polarlyse is offline   Reply With Quote
Old 05-24-2011, 09:07 PM   #2
CLOUDSPLITTER "Tahawus"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , Milky Way
Join Date: Jun 2007
Posts: 11,363
Images: 1
Thumbs up


Can't comment on the size, but a pair of deep cycle Marine/RV Interstates have served me well in the past.

I installed the IOTA two Seasons ago...Great choice.
__________________

__________________
PFC

"Tahawus"

Sandra wanted to go to Cleveland on vacation,
but Im the Husband, so we went to Cleveland. 😂
RLC


Its a crooked piece of time that we live in.
John Prine
ROBERT CROSS is offline   Reply With Quote
Old 05-24-2011, 09:49 PM   #3
Rivet Master
 
1975 29' Ambassador
Reno , Nevada
Join Date: May 2003
Posts: 1,351
The compartments are usually rather tight for the group 27's and larger batteries just won't fit.

AGM's have a bit less energy density than wet cells. Their major advantage is usually a bit longer life, about 1.5 times (re NAWS FAQ) which usually isn't all that cost effective. The sealed aspect also isn't that big a deal if your batteries are properly maintained.

Also note that the kinds of differences in energy capacity in this selection aren't really significant in the overall scheme of things. Batteries don't hold all that much available energy to start with and have significant variance in capacity due to factors such as temperature, age, cycle to cycle variance, and use profile. (often people replace aged batteries whose capacity has decreased by almost half with a new one and then crow about how great the new one is ... be careful of such testimony!)

The IOTA web page looks to have good advice and is more accurate than some I've seen. My only concern is that it does not have a maintenance mode technique that inhibits sulfation during storage. The converters appear to be float only and that isn't the optimum for best battery life.
bryanl is offline   Reply With Quote
Old 05-24-2011, 11:31 PM   #4
2 Rivet Member
 
Currently Looking...
Hephzibah , Georgia
Join Date: Nov 2009
Posts: 43
Do you know of anywhere in your area that sells 31 group size Deka marine batteries.

If you really want to go crazy you could get an 8D tractor battery.
nti06 is offline   Reply With Quote
Old 05-25-2011, 07:34 AM   #5
retired USA/USAF

 
2001 30' Excella
Somerset , New Jersey
Join Date: Jan 2009
Posts: 2,209
Thanks all for the input. I'm not worried about long term storage since I remove the batteries and bring them home. I keep them on a tender. We don't dry camp on a regular basis but when on the road we may spend a night here and there without shore power. I would like the ability to be dry for a couple of days though if I want to leave the beaten path. When new I think the batteries would last about 4 days with only the refrigerator on. We do have access to a generator and plan to take it if we're looking to go native for awhile. At least as long as the water and storage tanks would allow.


Thanks again for sharing your experience
__________________
Roger in NJ

" Democracy is the worst form of government. Except for all the rest"
Winston Churchill 1948

TAC - NJ 18

polarlyse is offline   Reply With Quote
Old 05-25-2011, 09:35 AM   #6
Rivet Master
Commercial Member
 
New Borockton , Alabama
Join Date: Sep 2002
Posts: 1,303
Images: 21
Quote:
Originally Posted by bryanl View Post
The IOTA web page looks to have good advice and is more accurate than some I've seen. My only concern is that it does not have a maintenance mode technique that inhibits sulfation during storage. The converters appear to be float only and that isn't the optimum for best battery life.
Actually it does, every 7 days.
http://iotaengineering.com/pplib/IQ4manual.pdf
__________________
Randy...Converters, Inverters, Trimetric, Surge Protectors, Zamp Solar, AGM Batteries
www.bestconverter.com
68 Overlander is offline   Reply With Quote
Old 05-25-2011, 06:53 PM   #7
retired USA/USAF

 
2001 30' Excella
Somerset , New Jersey
Join Date: Jan 2009
Posts: 2,209
I took a closer look at my space available. I really don't think I will take a chance and attempt to exceed the group 27 size battery. If I was up to taking the trailer along and giving one a try it just might work but by my measurements it's just to close to call. So I won't attempt the larger battery. I will probably be ready next week to make the purchase.
__________________

__________________
Roger in NJ

" Democracy is the worst form of government. Except for all the rest"
Winston Churchill 1948

TAC - NJ 18

polarlyse is offline   Reply With Quote
Reply


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

Advanced Search
Display Modes

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
What is the best replacement battery to buy? MikeAir Batteries, Univolts, Converters & Inverters 30 08-04-2011 04:23 PM
What size wire for battery hookup? t7389sg Mechanics Corner - Engines, Transmission & More... 11 05-05-2011 07:51 AM
What size battery fits best in a '90 350LE? t7389sg Mechanics Corner - Engines, Transmission & More... 1 04-07-2011 05:58 PM


Featured Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:22 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.