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Old 05-14-2014, 06:51 PM   #13
JRTJH
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Join Date: Mar 2011
Location: Gaylord
Posts: 26,841
From your last post, it sounds like you put a battery charger on the battery while you did a couple of things and commented that the battery was "fully charged". Depending on the size of your battery charger, it should take upwards of 6 hours or possibly as long as 12-14 hours to fully charge a battery that is "dead".... So, you may not be starting with a fully charged battery ????

The next time you're at the RV, make sure the battery is FULLY charged, then remove both the battery cables (If I say to remove one or the other, someone will say it's the wrong one and the other should be removed) and see if the battery will hold a charge. I think that you have something in the RV that is either turned on (and you don't know about it) or you've got a "weak battery".

If you've got the battery at home, charge it up, take it to the RV, hook it up, do the things you need to do, and before you leave, just remove both the battery cables. Remember, white is NEGATIVE (ground) and black is POSITIVE......

Theoretically your battery should operate the trailer for at least a week with nothing turned on except the "emergency monitors and the radio backlight". Those devices will drain the battery. The length of time really depends on the size of the battery, the temperature (to a much lesser degree) and length of time until dead. Usually with a single deep cycle group 27 battery you should still have "some power" in the battery after a couple of weeks, but it will be dead probably within a month.


As an ending thought, is it possible that you've got the thermostat set to heat and the furnace is coming on late at night when the temp cools down?

Hope you find your issue.
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2015 F250 6.7l 4x4
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