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Old 06-16-2017, 12:17 PM   #1
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26DBH Dual Battery Setup

Does any one have 2 12v batteries connected parallel to their trailer? If so, when plugged into shore power is your fan on power converter under the fridge is on if the batteries are fully charged. Mine doesn't seem to turn off. Which is annoying when trying to sleep at night. Trying to see if that's normal.
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Old 06-16-2017, 12:24 PM   #2
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If you're plugged into shore power and your batteries are fully charged, you could install a battery switch and turn the batteries off when you're hooked up. Everything will work fine.
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Old 06-20-2017, 06:16 AM   #3
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I think the converter that supply's 12v to your lights and other 12v systems is running. So my guess is the fan is keeping things cool down there. Also it is supplying a trickle charge to your batterys.
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Old 06-20-2017, 07:50 AM   #4
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I can't remember, if in the past the fan only turned on if the battery power was low. The converter would then bulk charge the batteries causing the fan to run on to cool down the converter then stop once batteries where charged.
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Old 06-20-2017, 08:00 AM   #5
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If this has not happened before, I would check the output of your converter. After a while, when the batteries are fully charged, it should drop down to 13.6 or even 13.3 volts to maintain the batteries and supply other loads in the coach. If the fan is running it may be stuck on high voltage, which is bad, or you may have a big load somewhere that is taxing it.
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