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Old 10-09-2018, 08:33 AM   #1
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Leave Batteries in or take them out

Getting ready to winterize the 3250. In years past I have always left the batteries in and left the camper plugged in all winter long. Is it better to pull the batteries and leave the camper unplugged for the winter. My concern is over charging the batteries over the winter months which did happen on our last camper. If I don't leave it plugged in the batteries will be dead come spring time.
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Old 10-09-2018, 08:38 AM   #2
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I leave mine plugged in 24X7X365 but I also changed my converter to a Boondocker 4-stage smart converter. I also added a single point battery fill and check the water in them.
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Old 10-09-2018, 08:51 AM   #3
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I leave my batteries in the motorhome on Battery Tender.....but everyone does things differently.

BTW......How can someone who is winterizing their RV in Upper State New York pick the name “No more shoveling”?
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Old 10-09-2018, 08:54 AM   #4
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If the converter is not smart like BandJCarm's, I would invest in a smart charger like a CTEK (google it), or remove and bring them in and throw a trickle charger on once a month if you don't have a smart charger.
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Old 10-09-2018, 09:25 AM   #5
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Late generation battery maintainers (trickle chargers) and the converter in campers rarely overcharge the battery and can be left connected to shorepower -- if you have it. Checking periodically is prudent.

With no shorepower and having spilled too much battery acid over the years I leave my batteries in place on my campers and boats. They get fully charged and electrolyte topped off before their Thanksgiving to Easter hibernation and the negative cables removed to eliminate any hint of parasitic discharge. They will, of course, self-discharge but that process is slower in cold temperatures. 5+ months of storage and they come out every April at 12.3 to 12.4 volts or 75% charged.



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Old 10-09-2018, 09:49 AM   #6
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Doing what you've been doing works very well. It sounds like your system charger does very well at maintaining your battery health. Unless you live where it's extremely cold, a fully charged flooded battery will not freeze. One of the most important factors for maintaining the health of flooded batteries depends on maintaining proper charge. A fully charged flooded battery will not freeze until temperatures fall to about -70° C (-94° F).

A good reference for this topic is:
"Automotive Batteries at Low Temperatures"
http://www.dtic.mil/dtic/tr/fulltext/u2/a239115.pdf
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Old 10-09-2018, 09:56 AM   #7
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Leave it in...
check the water level in the battery about 1X per month
fill to the bottom of the split ring in the battery with distilled water only
you will be good...

I leave my 2104 Shamrock plugged in at home 365 days a year when not camping
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Old 10-09-2018, 02:37 PM   #8
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Just don't stop camping then you don't gotta worry about it.
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Old 10-09-2018, 02:37 PM   #9
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Quote:
Originally Posted by kenandterry View Post
I leave my batteries in the motorhome on Battery Tender.....but everyone does things differently.

BTW......How can someone who is winterizing their RV in Upper State New York pick the name “No more shoveling”?
We don't take off for the south till after the Holidays sometime around mid January. We have had Januaries when the whole month has been below zero. Don't need any issues with freeze ups and for the 20 minutes it takes to winterize it's worth it.
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Old 10-09-2018, 03:18 PM   #10
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I've never taken mine out. Since I have a disconnect switch, they are nearly still fully charged 4 months later.
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