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02-07-2020, 01:10 PM
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#1
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Canadian Member
Join Date: Feb 2012
Location: Eastern GTA, Ontario, Canada
Posts: 6,238
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What Battery Size Will Fit in an OEM 5th Wheel Battery Box
The dealer installed a basic Group 24 battery in the battery box of my Rockwood 5er. Although we've always camped on an electric site, I'd like to replace it with something that's better quality and more Amp-Hours in case the power goes out (had that happen) or we actually try dry camping/boondocking.
So I'm wondering what size of battery will fit in the standard 5er battery box. Would a BCI Group 31 fit? How about a Trojan T-1275 (13"L x 7.13"W x 11.13"H) or a Trojan SCS200 (12.8"L x 6.73"W x 9.8"H)?
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2023 Rockwood Signature 8262RBS
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed
2019 Rockwood Signature 8290BS (2019 - 2022)
2011 Rockwood Signature 8293SS (2015 - 2018)
2010 Rockwood Roo 23SS (2012 - 2014)
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02-07-2020, 02:41 PM
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#2
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,855
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A Group 24 box will only fit a Group 24 or Group 24F.
A GC2 6v golf cart battery will fit but is slightly taller.
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Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.) 
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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02-07-2020, 02:59 PM
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#3
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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If the battery you want doesn't fit, get a new battery box. If it's a recessed box, cutting the material around it to fit a bigger box is not usually that big a deal. There's always a way.
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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02-07-2020, 05:19 PM
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#4
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Canadian Member
Join Date: Feb 2012
Location: Eastern GTA, Ontario, Canada
Posts: 6,238
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Here's a picture of one something like mine.
I found the Lavanture Products MA102BS battery box on Amazon that looks very similar. Their catalog says its 12.75" long, no measurement for the height.
Mine is definitely larger than the Group 24 battery I'm using but I don't know if a Group 31 would fit.
It's a pain to open if you use 6 screws like the dealer did so it might be worth looking at something to replace it that's more convenient to open and check the water levels. I'll see if a standard battery box strap will be long enough.
I don't think the typical cheap vented Camco battery box (like you put on the front of a TT) would be appropriate in the compartment. Battery boxes like Century Plastics and NOCO's commercial series are a bit pricey to ship up here to Canada. I'll see if I can find a Canadian source. Otherwise, I may have to get inventive with a heavy duty storage box.
__________________
2023 Rockwood Signature 8262RBS
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed
2019 Rockwood Signature 8290BS (2019 - 2022)
2011 Rockwood Signature 8293SS (2015 - 2018)
2010 Rockwood Roo 23SS (2012 - 2014)
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02-08-2020, 07:45 AM
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#5
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,269
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Lots of inventive people out there who made custom battery boxes out of everything from two kitchen dish tubs to paper totes.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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02-08-2020, 08:00 AM
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#6
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Site Team
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 9,850
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Itat, I just went and measured mine which looks exactly like your picture above. The inside measurements are 12½" long x 7" wide x 10" tall. A Group 31 is too long. The Trojan SCS200 would be close but it appears a little too long. Looks like the biggest you can fit comfortably is a group 27. They make larger vented battery boxes, so you might find one that will work.
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Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin! 
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02-08-2020, 08:33 AM
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#7
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Canadian Member
Join Date: Feb 2012
Location: Eastern GTA, Ontario, Canada
Posts: 6,238
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Thanks, Herk and Bama Rambler.
__________________
2023 Rockwood Signature 8262RBS
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed
2019 Rockwood Signature 8290BS (2019 - 2022)
2011 Rockwood Signature 8293SS (2015 - 2018)
2010 Rockwood Roo 23SS (2012 - 2014)
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02-08-2020, 08:41 AM
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#8
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Junior Member
Join Date: Jul 2019
Posts: 5
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I removed my factory battery box and built a plywood box....holds 4 batteries.
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02-08-2020, 02:57 PM
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#9
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Senior Member
Join Date: Feb 2014
Posts: 2,832
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For convenience sake...here are the typical dimensions of wet cells in the 4 most common sizes:
Batt sizes LWH"
10.75x6.75x9.38 Group24
12.5x6.76x9.38 Group27
13x6.75x9,5 Group31
10.25x7.13x10.88 GolfCart2...one 6V
__________________
________
Cam
2015 Georgetown 280DS
2019 Vespa Primavera 150's (pair)
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02-09-2020, 07:13 AM
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#10
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Senior Member
Join Date: Nov 2017
Posts: 223
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Quote:
Originally Posted by camaraderie
For convenience sake...here are the typical dimensions of wet cells in the 4 most common sizes:
Batt sizes LWH"
10.75x6.75x9.38 Group24
12.5x6.76x9.38 Group27
13x6.75x9,5 Group31
10.25x7.13x10.88 GolfCart2...one 6V
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camaraderie,
Thanks for posting this. Very helpful info.
TC
__________________
2018 Flagstaff E-Pro 19 fbs
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