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Old 10-12-2015, 11:12 AM   #1
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Removing batteries for winter

If I keep my 3-stage inverter plugged in to shore power for the winter (or perhaps run it for 24 hours once a week) is it really necessary to remove batteries during freezing temps (no lower that 0-5 degrees F). I understand that a fully charged AGM battery won't freeze under reasonably low temps but I don't know what that threshold temp is.
Thanks for any advice.
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Old 10-12-2015, 11:19 AM   #2
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I meant "converter", of course
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Old 10-12-2015, 11:28 AM   #3
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As long as you keep them charged you should be fine. Battery disconnect switch should be in the on position otherwise you batteries may not charge, not sure what year AS you have. I have left mine outside for years with no issue in Western PA
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Old 10-12-2015, 11:32 AM   #4
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Thanks, paiceman. It's a new to me 2008 19' Safari SE
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Old 10-12-2015, 12:39 PM   #5
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Warm winter storage prolongs battery life significantly. Keep batteries fully charged. 60-70 degree range is ideal.

Tom
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Old 10-12-2015, 01:30 PM   #6
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As long as you know that you have a true 3 stage converter. My converter in my 2003 Classic is not 3 stage and will ruin a battery if I leave it plugged in when the trailer is not in use. I pull the batteries In the winter and connect them to a trickle charger.

Jack
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Old 10-12-2015, 01:47 PM   #7
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I'm with Jack...BSTS.

Lift 'em out...


...and down in the basement.


Our IOTA IQ4 does not charge if batts are not installed, so plugging in if needed is not a problem.

Bob
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Old 10-12-2015, 02:04 PM   #8
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Thanks, jcanavera. Yes, I do have a 3 stage converter mod. The PO was engaged enough to add this mod along with a few others. Such is the advantage of purchasing a previously loved AS.
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Old 10-12-2015, 08:09 PM   #9
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Is a float charger necessary?

I have a 2015 Bambi Sport and am looking ahead to its first winter. My question regards the batteries. I was thinking I might need a float charging system to keep from overcharging my batteries, but then a salesman told me that when I'm plugged into shore power the Airstream has a built-in float charger that keeps me from overcharging. Is this correct?
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Old 10-12-2015, 08:34 PM   #10
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It's important to identify which type of converter you have installed in your Bambi. You want a three stage rather than a single stage converter. I understand from other Forum members that single stage units are typically Parallax or TrippLite and 3-stage units are typically Progressive Dynamic or Magnum The 3 stage is essential as it reduces voltage to your battery as the battery reaches full charge, and produces only a trickle charge after that. Single stage converters will overcharge your batteries and ruin them if left attached past full charge. The trickle charge can remain attached.

You should confirm directly which type you have. In my 2008 19' Safari the converter is attached (below) the fuse panel. Just open up the front panel and check the manufacturer. I found that I originally had a Parallax unit (as I understand the factory was providing them in 2008 (and maybe still) but there was a sticker attached to mine indicting that it had been upgraded by the previous owner to one of the above mentioned 3-stage units.

Good luck. There's lots on the Forums about this topic.

Harold
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Old 10-12-2015, 09:12 PM   #11
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You might like to read my all winter test of storing a battery in a freezer at 0 to 5 F.


http://www.airforums.com/forums/f449...ml#post1602338
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Old 10-12-2015, 09:45 PM   #12
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First year winterizing question. Do I have to remove my AGM batteries over the winter? They are connected to the two 53 watt solar panels and charge controller that came from Airstream.
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Old 10-12-2015, 11:01 PM   #13
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Originally Posted by Jukeboxfun View Post
First year winterizing question. Do I have to remove my AGM batteries over the winter? They are connected to the two 53 watt solar panels and charge controller that came from Airstream.
I have a single solar panel and it kept my batteries topped off all last winter. Well, except for the 4 weeks I was down in Florida

I have my AS in a storage lot and the solar does a good job of keeping them charged. The reading has been 12.7 whenever I go check on it.
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Old 10-13-2015, 10:01 AM   #14
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Thanks for your (re-)post. Very interesting. Your evidence-based findings seem to provide the definitive opinion on this question. This was most helpful.
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