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Old 10-31-2011, 08:30 AM   #31
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Quote:
Originally Posted by 07ultra View Post
, leave my batterys in year round , pluged in or on a tender
There are good switches and junk ones just like most everything else in this
world.
Your plan works for you but we are mostly talking about folks who don't
or can't leave their trailers plugged in or on some sort of charge all the time.
Those folks need to disconnect their batteries or pull the appropriate fuses
or their batteries will be drained totally dead in a few weeks.
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Old 10-31-2011, 08:56 AM   #32
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Your plan works for you but we are mostly talking about folks who don't or can't leave their trailers plugged in or on some sort of charge all the time.
This brings up another question (maybe I should start another thread)?

I will take my batteries out of the camper after our last trip (end of Nov) and bring them home (Ohio). Can I just place them on the floor of the unheated garage and throw a charger on them once in a while for an hour or so? Or should I take them to the basement and do the same?

FWIW, I just have a pair of cheap-o Group 27s. And an inexpensive charger.
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Old 10-31-2011, 09:03 AM   #33
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As long as you keep them reasonably charged cold weather won't hurt them.
I'd not carry them down the basement stairs if I was you but that's just
my 2.

Also don't let people tell you they must be set on wood and not on the
floor. Modern plastic case batteries don't know the difference.
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Old 10-31-2011, 09:21 AM   #34
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I agree with Kydan.

As for charging by time, such as putting it on for an hour or two, you are better off if you make sure to charge fully each time you put them on the charger. You will want to avoid undercharging.

So, keep them on the floor in the unheated garage, check the volts periodically and recharge fully when needed. Or, get a battery minder or battery tender that will do it automatically for you.
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Old 10-31-2011, 09:30 AM   #35
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Or, get a battery minder or battery tender that will do it automatically for you.
Any recommendations? There seems to be a billion battery chargers on the market.
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Old 10-31-2011, 09:32 AM   #36
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I don't work for these guys nor do I have any monetary connection but
they have the lowest price on the web for this little automatic charger.
It's fully automatic and comes with 2 wire harnesses.
One you can connect into a trailer and charge without removing batteries.
And the other is a set of alligator battery clips so you can clip it directly
to the battery posts.

It's just $20 including shipping.

http://www.derbycycles.net/productde...urce=searchbar
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Old 10-31-2011, 10:43 AM   #37
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I use the battery tender Jr for my motorcycle battery. It has worked well for me for many years. Surprisingly well considering that its 12 years old now.

I should add that I use a Stanley 40amp Smart charger for the trailer for regular charging needs. I haven't used it as a trickle charger over the winter, although I don't see why that wouldn't work.
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Old 01-23-2012, 10:16 AM   #38
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Switch the Positive side. The reason why is if you jus switch the negitive you can still make a direct short inside the trailer from a positive line to the frame which is ground.

If you switch the positive at the battery you will never have the posibility of a short inside your trailer.

My 2 cents
If you put the switch on the negative side, there is no ground if its off
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Old 01-23-2012, 02:02 PM   #39
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Originally Posted by racedaymechanic View Post
If you put the switch on the negative side, there is no ground if its off
This is 100% true.

With a DC battery system there is no difference if you disconnect (switch off) the ground or positive leg. There is no power to the camper at all since there is no return path to the battery.
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Old 01-23-2012, 05:04 PM   #40
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Always switch the positive side,(unless you are in Europe) the direction of the current doesn't matter to a contact switch. I don't believe a sound technical reason can be made for switching the negative (ground) side of a battery.
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