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Old 09-07-2013, 08:03 PM   #1
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Winterizing Battery Question

I am in upstate New York, is it OK to leave the batteries in the trailer for the Winter. I was thinking of turning the switch off and just leave them in the battery compartment.
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Old 09-07-2013, 08:22 PM   #2
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Not a good idea. The cold will cause the battery to lose its charge and can eventually freeze. You need to somehow keep them on a trickle charge over the winter months. Nothing worse than a cracked battery leaking in yourcompartment. Do you have electric where you are keeping tht TT? Is it stored in a secure area? Best bet is to remove them and keep them at home on a trickle charge.
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Old 09-07-2013, 09:25 PM   #3
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X2. Remove the battery and store it above freezing temp. Even if you don't have a trickle charger you can put it on a charger every month or two just to keep it charged.
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Old 09-07-2013, 11:54 PM   #4
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If you do decide to remove the batteries be sure to identify where battery cables go before you take them off. Maybe take a photo of the cables with your cell phone camera. I have all of my POSITIVE CABLES marked with a red dot from fingernail polish.

It is so easy to get them reversed and that will blow fuses in your system.

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Old 09-08-2013, 12:09 AM   #5
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The best way to store a battery is with it fully charged, no load in a dry dark cold place. A home freezer would be good. Everyone her at our Marina in Ont. leaves the batteries on the boats and have done so for years.
It is essential that there is no load on the battery. Rvs have co and propane monitors which will deplete the battery. The best solution is to remove the positive leads from the batteries.
A trickle charger can result in a battery being boiled dry unless it is a smart device. Also - if it is accidentally disconnected from shore power it can drain the battery.
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Old 09-08-2013, 10:14 AM   #6
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Here is how the battery mfr. suggests storing your battery over a period of time
Don
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Old 09-08-2013, 11:00 PM   #7
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A couple of charts showing discharge rates for batteries. It seems like batteries are like a lot of us old geezers. They slow down a lot when cold.
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Old 09-09-2013, 03:59 PM   #8
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Quote:
Originally Posted by owenssailor View Post
The best way to store a battery is with it fully charged, no load in a dry dark cold place. A home freezer would be good. Everyone her at our Marina in Ont. leaves the batteries on the boats and have done so for years.
It is essential that there is no load on the battery. Rvs have co and propane monitors which will deplete the battery. The best solution is to remove the positive leads from the batteries.
A trickle charger can result in a battery being boiled dry unless it is a smart device. Also - if it is accidentally disconnected from shore power it can drain the battery.
OK, if you want a frozen and cracked battery case...listen to this guy....Ha ha. Kidding. But seriously, never store a battery in below freezing temps...it contains water for god sake...yes it is in a acid solution which will lower the freezing point but as the battery self discharges...it will freeze...especially in a freezer which stays at 0F or lower. Now a refrigerator would be a good storage place but who would want a battery in the fridge. I don't even leave my battery in the camper during the spring/summer/fall. I always disconnect, remove and store in my garage not in contact with the concrete floor. I know this old wise tale is not supposed to be true...but I had it happen to my last battery. The battery was fine for a month while on a work table, but when I moved it off the table onto the conc. floor and forgot about it...a week later it was at 7 volts; pretty dead and ruined since it was an older battery.
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Old 09-09-2013, 10:00 PM   #9
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People should store their batteries however they wish. However the simple facts do not change:

Fully charged battery with no load on it will remain charged for months. Colder weather slows the self discharge even more.

Experience: I have left 2 batteries on my boat all winter every winter for the past 35 years. No problems. The other 50 boats are stored the same way. Again no problems.
I does get very cold here in Ontario. At least as cold as upper NY. Way below freezing.
To each his own.
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Old 09-10-2013, 06:41 AM   #10
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Quote:
Originally Posted by owenssailor View Post
People should store their batteries however they wish. However the simple facts do not change:

Fully charged battery with no load on it will remain charged for months. Colder weather slows the self discharge even more.

Experience: I have left 2 batteries on my boat all winter every winter for the past 35 years. No problems. The other 50 boats are stored the same way. Again no problems.
I does get very cold here in Ontario. At least as cold as upper NY. Way below freezing.
To each his own.
It's interesting that the data charts you provided do not show any storage temperature below 5 degrees C, which is 41 degrees F, and quite a bit above freezing. We must conclude from this, storage below freezing is not recommend at all.
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