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Old 12-14-2018, 08:33 AM   #1
Wicked1
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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 AGMís with decent amp hours that can accommodate basic 150watts of Solar.

We donít 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 donít 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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Old 12-14-2018, 09:24 AM   #2
PNW Fireguy
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Take a look at Vmax 6v AGM’s available on Amazon.
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Old 12-14-2018, 09:53 AM   #3
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We have interstates in our new rig and we're fine with those.
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Old 12-14-2018, 10:22 AM   #4
Wicked1
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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
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Old 12-14-2018, 10:32 AM   #5
BuilderBob
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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.
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Old 12-14-2018, 03:22 PM   #6
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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.
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Old 12-14-2018, 03:26 PM   #7
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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
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Old 12-14-2018, 03:50 PM   #8
Wyatt Earp
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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.
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Old 12-14-2018, 04:23 PM   #9
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Quote:
Originally Posted by Wicked1 View Post
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
They donít need a box as they donít gas. You can devise something to facilitate secure storage or simply secure them with a strap or two.
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Old 12-14-2018, 08:14 PM   #10
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I run two group 31 agm from west marine in our unit.
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Old 12-14-2018, 08:27 PM   #11
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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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Old 12-14-2018, 09:09 PM   #12
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Quote:
Originally Posted by Last2Die View Post
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
These look like starting batteries, you want deep cycle batteries.
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Old 12-14-2018, 09:39 PM   #13
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Originally Posted by AZ Traveler View Post
These look like starting batteries, you want deep cycle batteries.
this one a little better ?

https://www.amazon.com/DieHard-38217...5%3A2470955011
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Old 12-14-2018, 09:49 PM   #14
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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
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Old 12-15-2018, 08:09 AM   #15
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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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Old 12-15-2018, 08:36 AM   #16
Wicked1
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Quote:
Originally Posted by mazboy View Post
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 ďmaintenance-freeĒ in the sense of not requiring the addition of water to offset hydrogen gas released during the charging process.'
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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Old 12-16-2018, 05:23 AM   #17
jeffba
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I found this about venting AGMs
https://www.boats.com/how-to/sealed-...-need-venting/
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