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Old 12-03-2018, 12:08 AM   #1
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battery drain

Coach batteries going dead from a full charge to less than 2 volts, in less than a weeks time, while in storage. The round disconnect by the steps is turned off. Any thoughts on what could be draining them?
Have stored it in this manner previous two seasons with no such issue.
It is a 2016 3010DS.

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Old 12-03-2018, 12:13 AM   #2
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Have you had the batteries tested with a hydrometer, after the are fully charged?
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Old 12-03-2018, 05:26 AM   #3
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Have the batteries "load" tested.
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Old 12-03-2018, 08:31 PM   #4
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Battery drain issue

Thanks guys for the info. I will get the necessary equipment to do that and see what the results are. Would be "nice" if it is simply a battery issue, as opposed to something wrong electrically elsewhere in the coach.


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Old 02-13-2019, 08:43 AM   #5
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How long do the original batteries tend to last with pretty regular use? I am having a bit of a draining problem also.
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Old 02-13-2019, 08:52 AM   #6
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Depending on how they are used and maintained, you can get 4-5 good years from the batteries normally supplied with a new RV. In some units, the battery disconnect switch will not disconnect the CO/Propane detector and possibly the DVD player. If this is the case, you can either move those connections to the switched side of the disconnect switch or remove the ground terminal of the battery. If the unit is in a remote storage for some time, I suggest disconnecting the negative battery terminal as this prevents vandals from turning lights such as tongue jack lights as the jacks are not normally controlled by the disconnect switch.
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Old 02-13-2019, 09:20 AM   #7
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Ah ha

Thank you! Both the DVD player and the CO detector stay on when stored. Thank you.
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Old 02-13-2019, 09:30 AM   #8
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instead of getting the equipment needed to load test the batteries you can take them to almost any auto parts store and have them do the load test. this is normally done for free. some will even let you leave them overnight for a free recharge. of course, their objective is to sell you things, like perhaps new batteries.
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Old 02-14-2019, 01:38 AM   #9
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Battery drain

It turns out that the batteries in this 2016 coach were manufactured in 2014, according to the labels. I took them to the auto parts store and they did a draw-down test on them and they were bad.
New ones installed. I put a disconnect unit on the negative terminal lines. That has kept them from depleting while in storage.
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Old 02-14-2019, 06:19 AM   #10
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It should be noted that you can kill a battery in less than a year.

Having too small a battery as often supplied with the rvís will do it.

They do not take running down below 12 volts very well.
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