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Old 10-29-2006, 12:17 PM   #1
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battery question

I went to walmart today to buy a battery and came home empty-handed. They basicaly have the eveready marine batteries. They are deep cycly and I think wet celled. I was going to get the 24 model. One said starting and one didn't. I'm guessing I don't need the starting feature? Also, they don't say 12 volt like all the car batteries. Am I to assume they are 12 volt? One more thing, what kind of thgings dod you have to do to care for a wet cycle battery? Last thing, what guage cable should I get to go from a PD 60 amp converter to the battery. Thanks out there!
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Old 10-29-2006, 12:42 PM   #2
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Originally Posted by rama777
They are deep cycly and I think wet celled. I was going to get the 24 model. One said starting and one didn't. I'm guessing I don't need the starting feature? Also, they don't say 12 volt like all the car batteries. Am I to assume they are 12 volt? One more thing, what kind of thgings dod you have to do to care for a wet cycle battery? Last thing, what guage cable should I get to go from a PD 60 amp converter to the battery. Thanks out there!
You want the deep cycle, sometimes called trolling, battery. If you get a group 24, it is a 12 volt battery. If you can get it to fit, you might consider the group 27 battery. It is a little longer, and has more reserve capacity (it will run things longer). You take care of a battery like that the way you should take care of any automotive battery, that is, check the electrolyte (acid) level in the battery monthly to keep it from going dry, and clean corrosion off the terminals when it appears.
10 gauge wire should be sufficient for a charge line from your converter.
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Old 10-29-2006, 01:50 PM   #3
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I am going to be living in my airstream and I will be plugged in all the time. Will my 60 amp converter charge the battery faster than I am using it? Thanks for helping.
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Old 10-29-2006, 02:52 PM   #4
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Originally Posted by rama777
I am going to be living in my airstream and I will be plugged in all the time. Will my 60 amp converter charge the battery faster than I am using it? ...
Battery charging is not an issue if you are plugged in all the time. In fact, if you have a modern-day converter, many vendors claim the battery is not even necessary with their converter. While believable, I personally have not tested the claim.

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Old 10-29-2006, 02:52 PM   #5
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The Deep Cycle MArine type battery is the way to go, unless you want to spend several times as much for glass mat or gel cell batteries. I'd agree that "Group 27" has more reserve capacity than Group 24, and your battery tray should be large enough for the larger battery. Terry has explained maintenance, which involves keeping fluid in it by adding water to each cell when it drops below the level tabs in the battery..

As for usage, once battery is charged, you should not be able to draw down power beyond capacity of charger.. Some of the power from charger goes direct to 12V loads inside trailer (all lighting, refrigerator controls and electronics, furnace contraols and fan, and vents). Those loads are pretty small, and most trailers will run for a weekend or more without any charger. The Univolt or other chargers will keep battery charged and provide all the additional 12V power needed when you are parked and plugged in...
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Old 10-29-2006, 03:01 PM   #6
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Originally Posted by rama777
I am going to be living in my airstream and I will be plugged in all the time. Will my 60 amp converter charge the battery faster than I am using it? Thanks for helping.
If you have the original UniVolt charger, I would be more concerned with over charging the battery...
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Old 10-29-2006, 03:52 PM   #7
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The PD 60A charger will be sufficient to power the lights and fans inside the trailer,with some power to spare. You do not need a battery with this charger.
I found, however, that the system seems more stable, and the charger ran quieter when a battery was connected to it. My system also employs the charge wizard.
I use 6ga battery cable for my connections from battery to charger, and from charger to the fuse panel. My converter has a fuse for the system, otherwise you should put a 40A or 60A fuse between the battery and the fuse panel.
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Old 10-29-2006, 04:41 PM   #8
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You may also want to put in a disconnect switch. About $15.
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Old 10-29-2006, 05:08 PM   #9
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Does anybody know if two group 27 batteries will fit in the A-frame mounted battery box on late model Airstreams?
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Old 10-29-2006, 11:41 PM   #10
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Cool. Will my converter run the lights, fans, and the original a/c unit? Thanks for the info.
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Old 10-30-2006, 08:47 AM   #11
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Cool. Will my converter run the lights, fans, and the original a/c unit? Thanks for the info.
lights and fans: yes.

air conditioner: no. that runs directly from the 110vAC...just like any of the AC outlets in the camper.
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Old 10-30-2006, 05:06 PM   #12
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really? It seems to be a part of the 12 volt schematic in my manual anyway.
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Old 10-30-2006, 05:33 PM   #13
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Quote:
Originally Posted by rama777
really? It seems to be a part of the 12 volt schematic in my manual anyway.
What Chuck said - it's definitely not part of the 12V system, and has nothing to do with the charging and light circuit.
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Old 10-30-2006, 06:07 PM   #14
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What uwe said - I mean what Chuck said -

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