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11-29-2017, 07:57 PM
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#1
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Member
Winnebago Owners Club
Join Date: May 2013
Posts: 38
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Use auto battery in permanent parked 5th.
We have parked our 2001 Royals International 5th wheel permanently, under roof in Central Texas for our winter home. We have converted to residential refer, electric (120 vac) furnace and a flush toilet. 12vdc is only used for lights, ceiling fan and igniting the gas water heater and kitchen range.
We currently have 3 old 12volt, deep cycle batteries in it. We want to replace these batteries. I am considering replacing them with a single 12 volt HD auto/truck battery. Since the unit is always connected to electric, with small electric load and continuous charging, I felt this could be a better and more economical choice than a deep cycle replacement. Your thoughts?
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Bob & Pat
2011 Winnebago Vista 30W, 2010 Jeep Liberty
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11-29-2017, 08:36 PM
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#2
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Senior Member
Join Date: Sep 2013
Location: Alberta - East of the Rockies, West of the Rest
Posts: 831
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I don't see any problem with this as long as the battery is well maintained and stays fully charged.
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2018 Ram 5500 with 2021 Arctic Fox 1140
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11-29-2017, 08:38 PM
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#3
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Senior Member
Join Date: Jan 2015
Location: Prescott, Arizona
Posts: 3,564
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I'm sure it would work, but the question is how long will it last? Most of us use 2-6v (or more) in series for longevity. If it is a winter home you may wish to consider AGM so water is not an issue.
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'04 Newmar MADP, 1100w of solar, Rubicon toad
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11-29-2017, 09:54 PM
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#4
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Senior Member
Join Date: Aug 2017
Posts: 558
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The converter will power the 12V in the trailer so there is not need for batteries.....but....if there is a power outage batteries will keep you from being in dark without warm water. In a pinch you could pull a battery out of a vehicle.
A battery shop could run an equalization charge on your old batteries so you can squeeze some more life out of them.
Good friend of mine works at on of the big 3 dealers. They put used batteries that have been equalized and tested in all the used vehicles they sell
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11-29-2017, 10:21 PM
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#5
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Senior Member
Join Date: Nov 2015
Posts: 26,689
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Only issue is which CONVERTER you have......
That 2001 vintage is most likely a single stage fixed voltage charger and could over-charge a single battery
Plus that converter may also be the type that needs a battery connected to use as a 'load' for it to have regulated voltage.
Single HD auto/truck battery will work OK
Just be aware of how your converter works
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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11-30-2017, 07:42 AM
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#6
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Member
Winnebago Owners Club
Join Date: May 2013
Posts: 38
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Thanks folks. I think I’ll give it a try. Appreciate your input!
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Bob & Pat
2011 Winnebago Vista 30W, 2010 Jeep Liberty
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11-30-2017, 08:47 AM
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#7
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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Group 31 has worked for me
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11-30-2017, 10:27 AM
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#8
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Senior Member
Join Date: Oct 2012
Posts: 1,194
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I would also suggest matching the CCA capacity of your current trailer batt
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Brian
2016 RAM 3500 6.7L DRW
2018 Chaparral 360IBL, Andersen Ultimate II hitch
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11-30-2017, 10:32 AM
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#9
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Senior Member
Join Date: Nov 2006
Location: Western NY
Posts: 6,136
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I would check w any local RV or battery dealer. Many folks replace a whole bank because some are bad and don't want to mix old &new...good practice.
They may have some still useful ones for cheap that would do fine when used as you describe.
You can give them one of your bad ones for core charge.
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Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
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11-30-2017, 10:39 AM
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#10
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Senior Member
Join Date: Jun 2010
Location: Upstate New York
Posts: 3,722
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Unless you already have a 'spare' automotive battery, the cost differential for a deep cycle battery, say from Walmart, is minimal.(I owned a TT predecessor to a Royals, a Rolls years back)
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Dave W
2011 Ford F250 6.7 Lariat CCLB, Gone but not forgotten
2014 Montana High Country 343RL (sold it!)
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11-30-2017, 01:18 PM
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#11
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Senior Member
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 5,659
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I always like to have a bit more then is needed, for contingency. As mentioned, a power outage could have you wishing you had a bit more AH's. I see no problem with your usage, going to a the single battery. But agree that I'd go for a true deep cycle 12V, or two 6V. If you don't mind maintaining Wet's, they are more economical to buy. If you want to put them in and forget them, the AGM allows that.... But, also check that your charger can handle AGM values.
Best of luck to you,
Smitty
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07 Country Coach Magna Rembrandt 45' ISX600
Roo II was our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
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11-30-2017, 06:57 PM
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#12
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Senior Member
Join Date: Aug 2017
Posts: 558
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Quote:
Originally Posted by Old-Biscuit
Only issue is which CONVERTER you have......
That 2001 vintage is most likely a single stage fixed voltage charger and could over-charge a single battery
Plus that converter may also be the type that needs a battery connected to use as a 'load' for it to have regulated voltage.
Just be aware of how your converter works
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I know about single output converters but I though they'd went out of style in the 80's. Good to know (but hard to believe) manufactures still used them in 2001. Any idea what year WAFCO and PD came out with the "3stage" converters.
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12-01-2017, 05:58 AM
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#13
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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You can use any type of battery so long as you are only using it to filter the DC. Starting (Auto) MARINE/deep cycle (WHat you most likely hae now) or DEEP CYCLE
The difference between them is basically how far you can run 'em down before they start fast aging.
Starting batteries like to be kept full, 80-90% State of charge MINIMUM
MARINE/deep cycle can go a LITTLE lowerm say 75-80%
DEEP CYCLE to 50 %
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Home is where I park it!
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12-01-2017, 06:09 AM
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#14
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Senior Member
Join Date: Jun 2017
Posts: 2,807
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Quote:
Originally Posted by bjlakatos
I would also suggest matching the CCA capacity of your current trailer batt
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CCA is not a concern in RV batteries.
Amp-Hour capacity would normally be a concern in an RV but for the OP's case it is not. He could get by with a small 7 AH gel cell like this:
https://www.amazon.com/NPP-Rechargea...+battery&psc=1
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