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Old 10-13-2012, 10:13 PM   #1
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leaving battery in

Thinking about leaving the battery in the trailer for the winter. The trailer can be plugged into 30 amp service. I cant see what the downside would be. I would think the battery would stay charged instead of sitting in the garage and not being charged all winter. We live in Canada where it can reach -25c.
Any thoughts!!
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Old 10-13-2012, 11:53 PM   #2
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I plan on doing the same thing, but living in Texas our winters are balmy compared to your location. Monitor the battery voltage and check your water level.
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Old 10-14-2012, 07:25 AM   #3
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I was wondering about this the other day. Is it better to leave your camper plugged in continuously or should you just plug it in once a month or so? What gives the longest battery life?
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Old 10-14-2012, 07:31 AM   #4
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I was wondering about this the other day. Is it better to leave your camper plugged in continuously or should you just plug it in once a month or so? What gives the longest battery life?
can't give you a comparison but I swear by a Battery Tender.....Bill
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Old 10-14-2012, 09:01 AM   #5
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I've been doing it for years....never been a problem. If you have a 3-stage converter, it will maintain the battery at approximately 13.2V, which would be a trickle charge. The freezing point of a fully charged battery is something like -92 degrees F, so that shouldn't be a problem.

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Old 10-14-2012, 09:09 AM   #6
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I was wondering about this the other day. Is it better to leave your camper plugged in continuously or should you just plug it in once a month or so? What gives the longest battery life?
The downside to plugging in occasionally is forgetting to do it. A discharged battery will freeze. A partially discharged battery will still freeze; just at a much lower temperature that a discharged one.
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Old 10-14-2012, 09:10 AM   #7
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ok im leavin it in!!
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Old 10-14-2012, 09:16 AM   #8
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I left mine in last winter, turned the battery disconnect off and just ran a light grade outdoor extension cord with a 1 amp battery tender from TSC. I tucked the tender up underneath the propane tank cover so it's out of the weather. I figure the converter only has so many hours of use in it, and I'd rather blow up a $20 battery tender in a few years than my converter. The converter rests over the winter.
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Old 10-14-2012, 10:20 AM   #9
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The converter rests over the winter.
I am sure it appreciates it. Mine likes to keep busy.
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Old 10-14-2012, 10:33 AM   #10
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I have a different point of view on battery maintenance for the winter. The 3-state chargers are certainly an improvement over the older chargers but they are not smart chargers; it is a trickle charger. You can't leave even a trickle charger on a battery indefinitely as it will ultimately "boil" the water out and your battery will be over-charged. IMO, a better strategy is to unhook the battery from the trailer and hook it to a smart maintainer; like a Battery Minder. It is smarter than the 3-stage converter and it also has anti-sulfation technology. I've used this kind of product for years with great success. My batteries last me for years. My motorcycle battery finally needs replacement but it is 10 years old; maintained by a Battery Minder.

If you do leave the battery hooked to the 3-stage converter, I would make sure to regularly visit the battery (ies) to check the electrolyte level. You can use this strategy but you can't just walk away until spring IMO.
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