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08-05-2020, 01:41 PM
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#1
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2016 19ft flying cloud
Spokane
, Washington
Join Date: May 2016
Posts: 165
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Costco Batteries
Would like recommendations on Costco batteries
Group 24 interstate $89. RV/Marine
Group 24 AGM interstate. $169
Has anyone had any experience with these batteries ?
Prices seem pretty good
Think AGM is worth twice the price ?
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08-05-2020, 01:51 PM
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#2
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Rivet Master
1986 31' Sovereign
Miami
, Florida
Join Date: Feb 2004
Posts: 3,137
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AGM’s real advantage is that you can have them in your living space as they do not (normally) outgas. So folks with larger battery banks often go that route. They also don’t require any routine maintenance. Your standard issue wet-cells need to be checked periodically for fluid level and distilled water added as necessary This is especially true if you have the old style single stage converter.
__________________
Sorta new (usually dirty) Nissan Titan XD (hardly paid for)
Middle-aged Safari SE
Young, lovely bride
Dismissive cat
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08-05-2020, 03:13 PM
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#3
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Rivet Master
2019 25' Flying Cloud
Houston
, Texas
Join Date: Jan 2019
Posts: 1,013
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Quote:
Originally Posted by n2916s
AGM’s real advantage is that you can have them in your living space as they do not (normally) outgas. So folks with larger battery banks often go that route. They also don’t require any routine maintenance. Your standard issue wet-cells need to be checked periodically for fluid level and distilled water added as necessary This is especially true if you have the old style single stage converter.
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I believe that an AGM selling point is that they are not as damaged from a deep discharge as wet cell batteries are. At least that is what they pitch for car starting batteries.
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08-05-2020, 03:32 PM
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#4
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4 Rivet Member
1961 22' Safari
Union
, Oregon
Join Date: Jan 2007
Posts: 477
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I got 7 years of good service from a set of group 24 interstates before they needed replacement.
Sam
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08-05-2020, 03:34 PM
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#5
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Rivet Master
2018 25' International
Slidell
, Louisiana
Join Date: Sep 2017
Posts: 3,725
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As you indicate, Most AGMs will accept more frequent and slightly deeper cycles to (35-40% rather than 50%) and maintain the same calendar life. They will have a longer life for the same 50% cycle. I consider the biggest advantage in addition to those already mentioned, is they will accept a continual maintenance (trickle) charge without water loss so if you have a solar charger or you keep it on shore power, there is no water level to check.
Like wet cells, AGMs don't care for complete discharges so resting voltages below 11.8 should be avoided at all reasonable cost. Note that batteries experience voltage loss with loads, 0.2 or so with a few amps, 0.5 at about 10 amps and 2.5 or more at about 100 amps so don't panic about voltage with loads.
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08-05-2020, 04:35 PM
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#6
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Amortized over 11 Seasons my two Lifelines cost $56.00/yr.🤔
Go with quality.
(and still doing B/U duty for the basement sump pump)👍
Bob
🇺🇸
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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08-05-2020, 06:30 PM
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#7
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Rivet Master
1974 Argosy 26
Morrill
, Nebraska
Join Date: Nov 2009
Posts: 6,014
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Bob;
Are you saying you spent over $600 each for your batteries? Or is that cost for multiple batteries?
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08-06-2020, 07:38 AM
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#8
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Quote:
Originally Posted by TG Twinkie
Bob;
Are you saying you spent over $600 each for your batteries? Or is that cost for multiple batteries?
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"Amortized over 11 Seasons my TWO Lifelines cost $56.00/yr.🤔
Go with quality.
(and still doing B/U duty for the basement sump pump)👍"
Bob
🇺🇸
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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08-06-2020, 07:59 AM
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#9
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Rivet Master
2012 25' FB International
Trent Woods
, North Carolina
Join Date: May 2013
Posts: 3,120
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To the OP, wet cell batteries are made by a very small number of manufacturers and sold under a bunch of different labels. I do not think it matters what brand you buy.
However, I completely agree with the AGM supporters. There is no reason to spend the kind of money it takes to buy an Airstream and then employ a false economy with wet cells. Most people do not know how to care for wet cells or just don't do it. Buy the AGM's.
Larry
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08-06-2020, 08:38 AM
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#10
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Moderator
2015 25' FB Flying Cloud
2012 23' FB Flying Cloud
2005 25' Safari
Santa Rosa Beach
, Florida
Join Date: Jul 2006
Posts: 13,159
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Greetings from the Florida Panhandle
We have always used the Interstate Group 24 batteries in our Airstreams. We have found that they last about five years before they start to lose their charge more rapidly. As soon as we notice this decrease in performance, we replace the batteries.
Last year Lucy was laid up with a hitch problem in Billings, Montana, on her way to Alaska. While we were there, Lucy's OEM Interstate batteries started to show signs of decreased performance. She was right at five years old. There was a Costco right up the road. We got her a pair of new Interstates before continuing to Alaska.
Brian
__________________
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with ProPride
2020 Silverado 2500 (Vivian)
2023 Rivian R1T (Opal)
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08-06-2020, 09:09 AM
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#11
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Rivet Master
1958 18' "Footer"
Idyllwild
, California
Join Date: Aug 2006
Posts: 645
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Agm
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