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Old 10-13-2019, 05:49 PM   #10
flygrimm
Junior Member
 
Join Date: Jul 2019
Location: BETHLEHEM
Posts: 11
Seems to me that the original question is why do the batteries discharge almost completely overnight. Been doing this since new.

My trailer has a single battery and will discharge in 4 or 5 days if left disconnected from shore power. There is always something running even with all the usual things turned off.

Several things run even when the trailer is dark. The converter, CO2 detector, radio and a few other things I can't think of right now.

I would charge the batteries and take them to Auto Zone or some other such place and have them checked. They have to be fully charged for this. If they check out OK or not I would then hook up the batteries (original or new) and hook up an ammeter between the positive cable and the battery terminal and see what your drain is. It should be a pretty small number. If not then I would start pulling fuses one at a time until the suspect circuit is found. There may be a defective unit of some kind or even a short.

Stuart
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