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Old 01-22-2018, 08:39 AM   #1
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Hidden draws on batteries??

Have 2008 Winnebago Vectra 40td. Bought 3 new Trojan deep cycle 150ah batteries. Completely charged by evening. By morning they are pulled down to 12.0 to 12.2 volts with inverter turned off. It's hard to find hidden draws. Does anyone have any starting points?
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Old 01-22-2018, 09:04 AM   #2
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This is already on the site somewhere, so I will just provide the link again.

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Old 01-23-2018, 08:54 AM   #3
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Battery care and management is a lot easier with a battery monitor system. Your inverter/charger may give you some information but I use a Victron battery monitor.
https://www.amazon.com/s/ref=nb_sb_n...attery+monitor
It tells you the voltage, current draw and much more about your battery bank. There are other brands of monitors but what I like is being able to monitor current draw at any moment, volts and the total of amp-hours of consumed battery power since my bank was fully charged.
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Old 01-23-2018, 09:08 AM   #4
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Are you talking in storage or in use mode?

In storage save yourself a lot of grief and put a manual disconnect in the the line to the battery bank.

In normal use it is probably stuff you don't want to lose. Things like propane or CO detectors, any software switched electronics, any control modules, etc. They all draw small bits of power that add up.
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