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Old 02-25-2021, 04:40 PM   #21
432bartman
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No, but when getting a battery for your RV, look at amp hours or reserve capacity not CCA. CCA is Cold Cranking Amps. You are not starting anything. Look for the highest reserve capacity in a deep cycle battery that will fit your battery location.

Its got a reserve capacity of 120, and a 20 amp hour rate:55. I'm by no means a battery expert. Hopefully it will work out fine.
 
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Old 02-25-2021, 04:57 PM   #22
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If you have the stock battery box like mine, they probably won't fit. You may need to replace that as well. Mine will barely fit 2 group 27's and it's a tight squeeze. I've had those Duracell batteries in my boat. They're good batteries. I have one group 31 for cranking and 1 group 34 for the trolling motor.
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Old 02-25-2021, 05:15 PM   #23
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I use 6V batteries whose capacity is 180 to 205 amp hours.
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Old 02-26-2021, 09:32 AM   #24
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If you have the stock battery box like mine, they probably won't fit. You may need to replace that as well. Mine will barely fit 2 group 27's and it's a tight squeeze. I've had those Duracell batteries in my boat. They're good batteries. I have one group 31 for cranking and 1 group 34 for the trolling motor.
Looks like the width and depth are the same, the Group 24 is actually an inch or so taller than the Group 34.
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Old 02-26-2021, 09:34 AM   #25
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I use 6V batteries whose capacity is 180 to 205 amp hours.
Carl, how many of the 6 volts do you run?
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Old 02-26-2021, 10:51 AM   #26
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I have 6 installed just so I don't have to worry about usage all that much. I basically run the entertainment center (TV, Stereo, DirecTV, computers) and lights (all LED) off the inverter.
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Old 02-26-2021, 11:25 AM   #27
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Carl was there anything you had to change with the factory inverter to charge the 6 volts?
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Old 02-26-2021, 11:55 AM   #28
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No the 6Vs are wired in series to so they (each set) are 12V to the converter.
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Old 03-26-2021, 09:40 PM   #29
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What you want to look for is the 20 hour amp rating. Those Duracel batteries are 55 amp batteries rated at the 20 hour rating. Wired in parallel you will have 110 amp hours of available power. Depending on your needs, this may be fine but if you boondock you are going to be lacking in available power.

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Old 12-11-2021, 05:35 AM   #30
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Tagging on to this older thread because I have the same question…lead acid vs AGM. I currently have two Deka group 27 lead acid batteries. Last trip the fridge inverter was beeping at me about low voltage. We do not boondock and do not plan to add solar panels for battery charging or boondocking. We only stay in full hookup campgrounds. Our unit is always plugged into a 50 amp outlet at the house when stored/ not camping.

The idea of changing to AGM and not having to check water levels is appealing.
I just started doing the research on various forums, but being the lazy bass-turd that I am, I figure folks here already have the answer and can spoon-feed recommendations to me.
Sams Duracell?
Interstate?
Walmart Everlasting?
Costco whatever?
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Old 12-11-2021, 06:52 AM   #31
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We switched to AGMs long ago. One less maintenance item and no real venting concerns. I just buy the best that Autozone offers at the time. The warranties are not as good as lead acids but it seems like they last a long time anyway. We don't boondock anymore and store plugged in as well. We survive on having one battery just fine.
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Old 12-11-2021, 08:27 AM   #32
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The idea of changing to AGM and not having to check water levels is appealing.
I just started doing the research on various forums, but being the lazy bass-turd that I am, I figure folks here already have the answer and can spoon-feed recommendations to me.
Sams Duracell?
Interstate?
Walmart Everlasting?
Costco whatever?

The Duracells are Deka batteries. Same exact battery with a Duracell sticker on them. They are good batteries.
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Old 12-11-2021, 08:31 AM   #33
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I switch from 12V Lead Acid to 6V Trojans two years ago, just had to change my Magnum Inverter/Charger from LA to AGM
Nice not having to crawl into the front to check the water level.
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Old 12-11-2021, 06:25 PM   #34
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In our last motor home we went from eight 6v deep cycle AGMs to two 12v deep cycle AGMs. Got them from the Interstate dealer, they have a full three year replacement guarantee. AGMs are expensive, but worth it....no monitoring water, they emit no noxious gasses (no vent required), can be mounted in any way (upside down if you want), the true install and forget batteries.
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Old 12-20-2021, 07:10 PM   #35
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I've just purchased a 2012 Monty 3582rl and want to put 2 agm's in it. The dealer i just purchased the camper from said it needs a different charger or controller if i do that. He also said it's a waste of time to put two 12v batteries in the camper since you won't get any more amp hours than with one battery. Is all of this true? If so, how do I get agms in there with combined amp hours of both batteries and the right controller?
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Old 12-20-2021, 09:03 PM   #36
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Nonsense! 2012s came with a 4 stage PD charger that handles AGM as well flooded cells. And two 12V batteries (of any type) wired in parallel give you twice as much amp hours as one 12V.

Your "dealer?" is flat wrong.
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Old 12-21-2021, 03:46 AM   #37
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As Carl said, when wired in parallel, two 12v batteries will give you twice as many amp hours compared to only one. Since you should not draw lead acid or AGM batteries below 50%, the usable amp hours would be that of one battery. For example, one 12v-100AH battery gives you 50AH that are usable. Two 12v-100AH batteries will give you 200AH total, but only 100AH that are usable. That's without risking damaging the batteries by drawing down below 50%. The charging profile for flooded lead acid and AGM batteries are virtually the same, since AGM batteries are still lead acid but use and "Absorbed Glass Mat" instead of flooded electrolyte which makes them "so called" maintenance free. Any working charger you have for lead acid batteries will work fine for the AGM batteries as well.
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Old 12-21-2021, 09:29 AM   #38
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I've just purchased a 2012 Monty 3582rl and want to put 2 agm's in it. The dealer i just purchased the camper from said it needs a different charger or controller if i do that. He also said it's a waste of time to put two 12v batteries in the camper since you won't get any more amp hours than with one battery. Is all of this true? If so, how do I get agms in there with combined amp hours of both batteries and the right controller?
You are getting some bad information here from the dealer and some posters. Do your own research, and talk to some knowledgeable battery dealers. You can start here:

http://www.vonwentzel.net/Battery/01.Type/index.html
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Old 12-21-2021, 10:51 AM   #39
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You are getting some bad information here from the dealer and some posters. Do your own research, and talk to some knowledgeable battery dealers. You can start here:

http://www.vonwentzel.net/Battery/01.Type/index.html
As one of the only two posters here (and both of us said the same thing), I would like to learn what bad information we are spreading so I won't do it in the future?
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Old 12-22-2021, 06:16 PM   #40
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I don't know where you came up with two posters, I just counted 19 all different, excluding me. I'm not about to wade through all these posts to answer your question, but here are some suggestions...based on my fourth set of AGMs on two RVs. My most recent change out was for AGMs that were eight years old:

1. AGMs will not work properly with just "any" charger.

2. AGMs will normally last longer than other batteries...four to 10 years.

3. If using a converter/charger, it really isn't designed to be a good battery charger. It's main purpose is to provide 12 volt power for the RV while plugged in to an A/C outlet. Since the converter is designed to not exceed a voltage of about 13.5 volts, it will never fully charge the batteries. Also, after it has succeeded in partially charging your batteries, it will then start to boil off electrolyte, as the "float" voltage is too high.

4. Here are some advantages of AGMs (the primary disadvantage is higher cost). Most of this is plagiarized from the internet:

- It last longer than usually two standard flooded batteries.
- It is designed to endure harsh climates and fulfill demanding powers.
- AGM batteries can handle high-voltage loads.
- It guarantees extended battery life and recharges quickly.
- Resistant to great vibrations
- No need for maintenance as it is non-spillable.
- It comes with great mounting flexibility.
- Can be mounted any place, no need for venting.
- Can be in any position, upside down if needed.
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