Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-24-2015, 12:53 AM   #15
Full Time Adventurer
 
BoldAdventure's Avatar
 
2007 27' International CCD FB
Nomadic , USA
Join Date: Jul 2013
Posts: 2,743
Trojan or Full River.

Interstates are crap.

Personal recommendation: Trojan 31XHS

I know you have a different model AS but here is a pic anyhow
__________________

__________________
Family of 4 living, working & exploring the USA in our Airstream.
OUR BLOG | FACEBOOK | INSTAGRAM
BoldAdventure is offline   Reply With Quote
Old 12-24-2015, 01:50 AM   #16
Rivet Master
 
ROBERTSUNRUS's Avatar

 
2005 25' Safari
Salem , Oregon
Join Date: Mar 2006
Posts: 7,266
Images: 18
Blog Entries: 51
Hi, after the original Interstates, I have bought all of my batteries from Costco. No need for expensive batteries for an occasional one, two, or three days without hook-ups.
__________________

__________________
Bob

2005 Safari 25-B
"Le Petit Chateau Argent"
[ Small Silver Castle ]
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
ROBERTSUNRUS is offline   Reply With Quote
Old 01-03-2016, 12:55 AM   #17
3 Rivet Member
 
2015 28' International
Ofallon , Missouri
Join Date: Sep 2013
Posts: 248
There is a ton of expert advice on the web. Below are some links I've been studying as I plan an upgrade to my oem Interstate type 24s to allow some short term dry camping.

Get a true deep cycle not a hybrid deep cycle / starting battery. Deep cycles are spec'd in Ah not cold cranking amps. I believe Interstate is a hybrid. True deep cycle batteries have thicker plates than a car type starting battery and thus have better life since a deep cycle is made to be repeatedly discharged and recharged.

Most respected brands seem to be Trojan and Lifeline. I've also noticed US Battery has some good choices. Flooded is cheaper but can only be discharged to about 50% without sacrificing life. AGM can be discharged to about 80% without killing the life but costs much more, about 2x.

Deep Cycle Battery Information and FAQ

Deep Cycle Batteries Guide : Energy Storage - Energy Matters

BatteryStuff Knowledge Base | Tutorials
__________________
mpsgolf is offline   Reply With Quote
Old 01-03-2016, 08:12 AM   #18
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,278
Quote:
Originally Posted by mpsgolf View Post
There is a ton of expert advice on the web. Below are some links I've been studying as I plan an upgrade to my oem Interstate type 24s to allow some short term dry camping.

Get a true deep cycle not a hybrid deep cycle / starting battery. Deep cycles are spec'd in Ah not cold cranking amps. I believe Interstate is a hybrid. True deep cycle batteries have thicker plates than a car type starting battery and thus have better life since a deep cycle is made to be repeatedly discharged and recharged.

Most respected brands seem to be Trojan and Lifeline. I've also noticed US Battery has some good choices. Flooded is cheaper but can only be discharged to about 50% without sacrificing life. AGM can be discharged to about 80% without killing the life but costs much more, about 2x.

Deep Cycle Battery Information and FAQ

Deep Cycle Batteries Guide : Energy Storage - Energy Matters

BatteryStuff Knowledge Base | Tutorials
Don't know if the links you provided have this information, but if you discharge a Lifeline AGM repeatedly to 80% you will kill it in short order. They, along with flooded cells, should be kept to the 50% discharge regimen for maximum life. If you're looking for repeated draw capacity to 80% you need to be in the lithium arena.

If you look at the Lifeline tech documents, you will find a graph of cell life (# of charge cycles) vs. depth of discharge. The sweet spot is at 50% DoD however, the less you draw your batteries, the higher number of charge cycles (and longer life) you get.

The MOST important thing regarding lead based battery systems is to fully re-charge them to 100% after use to prevent sulfation, which is the leading cause of premature battery failure.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 01-03-2016, 11:40 AM   #19
3 Rivet Member
 
2015 28' International
Ofallon , Missouri
Join Date: Sep 2013
Posts: 248
Quote:
Originally Posted by lewster View Post
Don't know if the links you provided have this information, but if you discharge a Lifeline AGM repeatedly to 80% you will kill it in short order. They, along with flooded cells, should be kept to the 50% discharge regimen for maximum life. If you're looking for repeated draw capacity to 80% you need to be in the lithium arena.

If you look at the Lifeline tech documents, you will find a graph of cell life (# of charge cycles) vs. depth of discharge. The sweet spot is at 50% DoD however, the less you draw your batteries, the higher number of charge cycles (and longer life) you get.

The MOST important thing regarding lead based battery systems is to fully re-charge them to 100% after use to prevent sulfation, which is the leading cause of premature battery failure.
Thanks for clarifying my comments. As you note, DoD vs Life is a curve with 80% being the worst case (shortest life).


__________________
mpsgolf is offline   Reply With Quote
Old 01-03-2016, 05:16 PM   #20
Rivet Master
 
2015 30' Classic
Pleasanton , California
Join Date: Jan 2015
Posts: 616
After poking around for some time I couldn't find any intrinsic reason why DD flooded batteries should exhibit shorter cycle lifetimes than AGM batteries. Both can happily be discharged to 80% and recover, albeit with some minor degradation.

This was an eye opener to me - that I can safely discharge my flooded lead-acid batteries to 80% every once in a while to stay comfortable without worry. Just last week I was boondocking my my wife and I cranked down the temperature to 50 deg F inside the trailer at night to try and limit my furnace usage. Next time I'll keep warmer and not stress so much.
__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
alano is offline   Reply With Quote
Old 01-03-2016, 07:06 PM   #21
Rivet Master
 
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
Quote:
Originally Posted by alano View Post
After poking around for some time I couldn't find any intrinsic reason why DD flooded batteries should exhibit shorter cycle lifetimes than AGM batteries. Both can happily be discharged to 80% and recover, albeit with some minor degradation.

This was an eye opener to me - that I can safely discharge my flooded lead-acid batteries to 80% every once in a while to stay comfortable without worry. Just last week I was boondocking my my wife and I cranked down the temperature to 50 deg F inside the trailer at night to try and limit my furnace usage. Next time I'll keep warmer and not stress so much.
My feeling is that it is more important to recharge the batteries fully to 100% as soon as possible rather than worry all that much about an occasional discharge to 20% of capacity. (80% discharge) Going all the way down to 0% I don't think is a good idea though. It is a trade off of course, the deeper the discharge and the more often it happens, the shorter the battery life. But even a battery kept at 100% charge, on the shelf without ever being discharged will have a limit to it's life, that is they don't last forever even if never used and kept fully charged.

How quickly they are fully recharged is just as important or more important than how deeply they are discharged.
__________________
idroba is offline   Reply With Quote
Old 01-03-2016, 10:30 PM   #22
3 Rivet Member
 
2015 28' International
Ofallon , Missouri
Join Date: Sep 2013
Posts: 248
Check Basic to Advanced Battery Information from Battery University. This and other sites I've been researching say AGM batteries do have a greater capability to discharge to a lower rate than lead acid with less impact on life. You have to get something for the much higher price!

"AGM offers a depth-of-discharge of 80 percent; the flooded, on the other hand, is specified at 50 percent DoD to attain the same cycle life."

Consistently discharging to the max DoD, whether 50% for flooded or 80% for AGM, will shorten the battery life compared to lesser levels of discharge. There are other considerations for battery life too though, as others have said.
__________________
mpsgolf is offline   Reply With Quote
Old 01-04-2016, 12:10 AM   #23
Rivet Master
 
2015 30' Classic
Pleasanton , California
Join Date: Jan 2015
Posts: 616
Battery U offers no references, nor are they clear that they are referring to deep discharge flooded lead-acid batteries. There are even quite a few comments at the end of the article that dispute their claims.
__________________

__________________
Al, K6IV
2015 30' Classic, "Chez Nu"
2014 RAM 2500 w/Cummins Diesel
ProPride Hitch, 400 W Solar
alano 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
2007 Safari Special Edition 25ft FB flooded ridgwayk Insurance & Claims 23 09-24-2014 06:14 PM
Georgia flooded airstreams wmarsha Insurance & Claims 245 02-11-2012 06:48 PM
Fixing a flooded trailer? DanB Insurance & Claims 36 10-12-2009 09:41 PM
Woke up the morning to flooded floor altamont Waste Systems, Tanks & Totes 3 12-18-2008 11:08 AM
Black Tank Flooded Trailer John E Insurance & Claims 3 04-23-2002 10:19 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:33 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

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