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03-16-2015, 10:04 PM
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#1
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Member
Join Date: Aug 2014
Posts: 58
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Battery replacement
Any recommendations on what brand of batteries to replace the ones I have in my 2015 31sl. Both my batteries are bad for whatever reason. Getting ready to change them out. I had Walmart deep cycle batteries in my last unit and they did an adequate job.
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2015 31SL: 2021 CHEVROLET SILVERADO 2500 HD DURAMAX DIESEL CREW CAB
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03-16-2015, 10:20 PM
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#2
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Senior Member
Join Date: Oct 2014
Posts: 109
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That's what I use, highly rated by Consumers Report. Of course, Interstates are also good.
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2015 Carriage RL40, Residential Fridge, Onan 5.5KW
2020 Ram 3500 CTD, DRW, Aisin
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03-16-2015, 11:24 PM
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#3
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Senior Member
Join Date: Jul 2013
Posts: 2,054
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on a 2015 ? I'd go back to the dealer and redwood - that's horrible they put bad batteries on a new rv!
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Ours: '11 Monaco Diplomat 43DFT followed closely by '14 Jeep 4 dr Wrangler.
Hers: '13 Explorer Sport - AWD 365hp twin turbo scooter!
Previous: '13 Ford F350 CC Platinum and '13 38GK
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03-16-2015, 11:49 PM
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#4
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Senior Member
Join Date: Oct 2014
Posts: 109
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They put some crappy generic batteries in from the factory. They also put crappy tires on from the factory, but that's another thread.
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2015 Carriage RL40, Residential Fridge, Onan 5.5KW
2020 Ram 3500 CTD, DRW, Aisin
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03-17-2015, 02:15 AM
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#5
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Senior Member
Join Date: Feb 2013
Posts: 1,444
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My 31SL only came with 1 generic battery from the dealer. I don't do any dry camping so I installed 1 Interstate battery. I had one Interstate in my previous 5ver and it was great. 
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 Rick and Mindy
Retired
2013 Redwood 31SL, 2011 Ford F350 SRW, 6.7, Crew Cab with Firestone Bags, Titan Disc Brakes
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03-17-2015, 04:49 AM
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#6
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Senior Member
Join Date: Nov 2014
Posts: 2,032
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I had the same problem with mine. One battery shorted out so I replaced both with interstates. Both original battery's had no name brand no #s nothing to tell where they came from. The dealership or redwood reimbursed me about 2/3rd of the cost for the new ones. We were in the trailer for 2 mths
I 
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2015 36RL pushing a 2015 Denali
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03-17-2015, 07:04 PM
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#7
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Senior Member
Join Date: May 2013
Posts: 335
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Replaced my batteries with two golf cart 6 V batteries from Costco. $160 for the pair and they are made by Interstate. Lots of capacity.
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2012 Redwood 31SL chasing 2019 Denali HD 3500 Duramax SRW
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03-17-2015, 08:10 PM
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#8
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Senior Member
Join Date: Mar 2012
Posts: 1,136
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Now you're talking... That's what I'm doing as soon as I can chop a path through the ice to get to the battery box... UGH!
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Mike & Pam '12 36RL, Kodiak Discs, 17.5" G114s H-Rated, SRE4000 w/HD Shackles, Joy Rider Shocks, Flex Air, 5.5 Onan, W&D, DW, 4 Scare Lights, (2) 6V Trojan T-145s; Progressive EMS-HW50C, Winegard DTV Sat, Sony/Denon 4K Home Theater, WiFiRanger EliteAC Pack, weBoost 4G-X Cell Booster.
2022 RAM 3500 Limited CC, LB, 4x4, DRW, Max Tow, Cummins HO, AISIN, 4.10, Mopar 30K w/OEM Prep, Transfer Flow 70gal Aux Tank/Toolbox.
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03-17-2015, 09:37 PM
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#9
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Senior Member
Join Date: Oct 2014
Posts: 109
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That's a good price for the golf cart batteries. We don't have a Costco around here close, though. That would be the best way to go.
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2015 Carriage RL40, Residential Fridge, Onan 5.5KW
2020 Ram 3500 CTD, DRW, Aisin
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03-17-2015, 11:22 PM
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#10
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Senior Member
Join Date: Nov 2011
Posts: 304
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We're using two maintenance free Interstate Batteries that were installed the day we picked it up three years ago. Still going strong.
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03-18-2015, 04:53 AM
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#11
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Senior Member
Join Date: Mar 2012
Posts: 1,136
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By the specs, I'm installing a new battery box and (2) Trojan T-145 6V. That should make a big difference dry camping before I have to hit the Onan button.
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Mike & Pam '12 36RL, Kodiak Discs, 17.5" G114s H-Rated, SRE4000 w/HD Shackles, Joy Rider Shocks, Flex Air, 5.5 Onan, W&D, DW, 4 Scare Lights, (2) 6V Trojan T-145s; Progressive EMS-HW50C, Winegard DTV Sat, Sony/Denon 4K Home Theater, WiFiRanger EliteAC Pack, weBoost 4G-X Cell Booster.
2022 RAM 3500 Limited CC, LB, 4x4, DRW, Max Tow, Cummins HO, AISIN, 4.10, Mopar 30K w/OEM Prep, Transfer Flow 70gal Aux Tank/Toolbox.
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04-22-2015, 05:23 AM
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#12
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Junior Member
Join Date: Sep 2014
Posts: 2
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My batteries have given out and I only used the 2015 rv for two months last fall.
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04-22-2015, 08:51 AM
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#13
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Senior Member
Join Date: Jan 2012
Posts: 506
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I have 2 Interstate batteries that have performed well over the past 3 years. Make sure you do not draw down your batteries to low while in use and keep them charged during storage with a solar panel. If you try to adhere to draw downs of no more than 50% on deep cycle and 40% on standard batteries, you should get good life out of them. Also do not mix brands.
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Dean & Pam - SOB
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04-23-2015, 01:56 AM
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#14
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Junior Member
Join Date: Mar 2015
Posts: 6
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The Dealer replaced ours after 3weeks!
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04-23-2015, 01:58 PM
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#15
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Senior Member
Join Date: Jul 2013
Posts: 2,054
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If you are in the DFW, Tx area, I have 3 good interstates that are going back with my redwood
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Ours: '11 Monaco Diplomat 43DFT followed closely by '14 Jeep 4 dr Wrangler.
Hers: '13 Explorer Sport - AWD 365hp twin turbo scooter!
Previous: '13 Ford F350 CC Platinum and '13 38GK
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04-24-2015, 06:42 PM
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#16
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Junior Member
Join Date: Sep 2014
Posts: 29
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The dealer replaced our originals with Interstates during the pre-delivery inspection. We were told the originals froze during a bad winter at the manufacturing plant.
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Mike n Vicki King
2015 Redwood 36RL
2015 Ford F350 DRW FX4
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07-10-2015, 04:18 AM
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#17
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Member
Join Date: Mar 2014
Posts: 51
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Converter issues w/6v batteries
I have to replace my bstteries and am thinking of changing to two 6V batteries in series. It looks like several folks have done that. Are there any issues with the converter for charging when on shore power or the genset? Are there any other gotchas folks have run into?
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07-10-2015, 05:37 AM
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#18
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Senior Member
Join Date: Feb 2013
Posts: 7,101
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Great choice!
The only complication is you'll have to get a different battery box and vent it. The 6 volts set taller than the standard 12V so the factory battery boxes won't work. Ken and Donna came up with a nice replacement box.
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Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW
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07-10-2015, 05:58 AM
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#19
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Senior Member
Join Date: Apr 2014
Posts: 383
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I had them convert to 2-6 volts when I purchased, no issues ... They changed the battery box and this it.
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 Yale & Tammy
2014 F-350 4x4 crew cab, SRW, 6.7, 3.55's, 18K PullRite
2014 Redwood black and Gold 38RL, king slide in slide, 5.5 Onan
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07-10-2015, 03:49 PM
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#20
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Senior Member
Join Date: Feb 2013
Posts: 1,855
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Quote:
Originally Posted by 5th_Time
By the specs, I'm installing a new battery box and (2) Trojan T-145 6V. That should make a big difference dry camping before I have to hit the Onan button.
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I'm sure you'll be smarter than me. First time dry camping I neglected to realize that the genny is wired into the same 12V system which feeds other on board systems. Bottom line, you're Genset won't start with a weak battery bank. Duhh. 
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2012 F350 KR CC DRW w/ some stuff
2013 36FL
Cindy and Tom, Toby and Kasey (our Berner and Newfie)
Oh...I forgot the five kids.
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