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12-14-2018, 07:33 AM
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#1
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Montana Fan
Join Date: Jan 2018
Location: Manahawkin
Posts: 274
M.O.C. #21100
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12V AGM Battery Need Suggestions
Looking to replace our led acid batteries that CW installed with our new Montana. We have 2 so I am looking for 2 AGM’s with decent amp hours that can accommodate basic 150watts of Solar.
We don’t like the gases inside the front compartment especially we carry an LP Genset, but we do not go off grid just want batteries that I don’t have to worry about toxic gases and if we decide to put our 150 watt Go Power Solr to use the new batts will still work. We have a 3121RL and right now we can run Refer for 32-36 hours while driving without ice maker on, so looking to do the same.
I thought about Lopo but they are expensive and I would have to change too much stuff so any suggestions would be appreciated.
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12-14-2018, 08:24 AM
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#2
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Montana Master
Join Date: Nov 2015
Location: Arlington
Posts: 1,522
M.O.C. #18081
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Take a look at Vmax 6v AGM’s available on Amazon.
__________________
SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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12-14-2018, 08:53 AM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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We have interstates in our new rig and we're fine with those.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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12-14-2018, 09:22 AM
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#4
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Montana Fan
Join Date: Jan 2018
Location: Manahawkin
Posts: 274
M.O.C. #21100
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Will 4 of those fit in the battery box on my Montana? 2 12volts do but not sure 4 6 volts will
Also do you need any special charger or inverter for the 4-6volts? I am not using solar yet and I have a 2000watt inverter for our residential fridge
__________________
2016 F350FX4 King Ranch CC SB 6.7PSD
2018 Keystone Montana 3121RL
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12-14-2018, 09:32 AM
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#5
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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4 won't fit in the stock battery unless the put an over sized box in there. The stock charger will work fine that's what we have and have never had any problems.
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails
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12-14-2018, 02:22 PM
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#6
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Established Member
Join Date: May 2018
Location: Newport
Posts: 45
M.O.C. #21746
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If your major concern is off gassing and not capacity, then one large AGM battery should serve you well. I installed a 105AH AGM when I purchased my 3121RL and I've not had any power problems. I don't boondock and my rig is on shore power at home so my situation may be somewhat unique.
__________________
2018 Montana 3121RL, 35 feet of home away from home.
2018 Chevy 3500HD, 4WD, Double Cab, SRW, 8' bed, Summit White with stump pulling diesel.
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12-14-2018, 02:26 PM
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#7
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Montana Fan
Join Date: Jan 2018
Location: Manahawkin
Posts: 274
M.O.C. #21100
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I do the same, never boondocks have 50 amp at home but when we drive from NJ to Florida in like 32 hours Injeed my batteries to provide power to our residential Fridge, so 2 AGM 12v batteries is ok but I need them to be at least 130amp hours so I can run fridge for 1.5 days off battery u til we get to the campground
__________________
2016 F350FX4 King Ranch CC SB 6.7PSD
2018 Keystone Montana 3121RL
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12-14-2018, 02:50 PM
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#8
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Established Member
Join Date: May 2018
Location: Newport
Posts: 45
M.O.C. #21746
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Sounds like you drive I-95. A great road but somewhat outdated for the volume of today's traffic. Concerning your battery, while connected to your TV, it should be charging the coach battery. If boondocking you would want to consider unplugging from the truck so you don't drain its battery. Of course your idea of installing a large AGM should take care of your power concerns, especially if you have a gen set.
__________________
2018 Montana 3121RL, 35 feet of home away from home.
2018 Chevy 3500HD, 4WD, Double Cab, SRW, 8' bed, Summit White with stump pulling diesel.
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12-14-2018, 03:23 PM
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#9
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Montana Master
Join Date: Nov 2015
Location: Arlington
Posts: 1,522
M.O.C. #18081
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Quote:
Originally Posted by Wicked1
Will 4 of those fit in the battery box on my Montana? 2 12volts do but not sure 4 6 volts will
Also do you need any special charger or inverter for the 4-6volts? I am not using solar yet and I have a 2000watt inverter for our residential fridge
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They don’t need a box as they don’t gas. You can devise something to facilitate secure storage or simply secure them with a strap or two.
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12-14-2018, 07:14 PM
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#10
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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I run two group 31 agm from west marine in our unit.
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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12-14-2018, 07:27 PM
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#11
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Montana Master
Join Date: Nov 2018
Location: Menifee
Posts: 1,109
M.O.C. #22986
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The batteries in my 2018 3920 suck, CW killed them, they had the coach for 3 months fixing things now they only hold a charge for a few days. im going to try to get them to replace them but If they won't would 1 or 2 of these work?
https://www.lowes.com/pd/Deka-12-Vol...UaAlDWEALw_wcB
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12-14-2018, 08:09 PM
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#12
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,930
M.O.C. #20477
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Quote:
Originally Posted by Last2Die
The batteries in my 2018 3920 suck, CW killed them, they had the coach for 3 months fixing things now they only hold a charge for a few days. im going to try to get them to replace them but If they won't would 1 or 2 of these work?
https://www.lowes.com/pd/Deka-12-Vol...UaAlDWEALw_wcB
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These look like starting batteries, you want deep cycle batteries.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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12-14-2018, 08:39 PM
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#13
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Montana Master
Join Date: Nov 2018
Location: Menifee
Posts: 1,109
M.O.C. #22986
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Quote:
Originally Posted by AZ Traveler
These look like starting batteries, you want deep cycle batteries.
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this one a little better ?
https://www.amazon.com/DieHard-38217...5%3A2470955011
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12-14-2018, 08:49 PM
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#14
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,930
M.O.C. #20477
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No this is still a staring battery. If it talks about cranking amps it is not a true deep cycle battery.
Here is an example of a true deep cycle https://www.batteriesplus.com/produc...UaAsRrEALw_wcB
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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12-15-2018, 07:09 AM
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#15
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,896
M.O.C. #9561
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NOTE: AGM BATTERIES DO RELEASE GAS.
'AGM batteries must still be vented. Here's why: AGM batteries are a type of valve-regulated lead acid battery. They are “maintenance-free” in the sense of not requiring the addition of water to offset hydrogen gas released during the charging process.'
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12-15-2018, 07:36 AM
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#16
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Montana Fan
Join Date: Jan 2018
Location: Manahawkin
Posts: 274
M.O.C. #21100
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Quote:
Originally Posted by mazboy
NOTE: AGM BATTERIES DO RELEASE GAS.
'AGM batteries must still be vented. Here's why: AGM batteries are a type of valve-regulated lead acid battery. They are “maintenance-free” in the sense of not requiring the addition of water to offset hydrogen gas released during the charging process.'
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How is that since they can be mounted sideways be they are sealed so where do they release gases? I am curious not questioning you?
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12-16-2018, 04:23 AM
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#17
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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