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Old 05-26-2020, 03:17 PM   #1
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Batteries Draining

I bought two new coach batteries in January 2020 for my 2015 Sunseeker 2800 QS. I always turn off the main power switch when in storage but for some reason the batteries are still drain. Any thought as to why the batteries would drain empty in one month? It appears that everything is off.
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Old 05-26-2020, 03:52 PM   #2
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There are some things that are usually still connected when switch is off. Lpg leak detector is one.

Since batteries are new and you intimated that draining has been a problem there is something still connected that is drawing from battery more than just an lpg leak detector.

Try charging batteries fully and then disconnect them. See if issue continues.
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Old 05-26-2020, 04:32 PM   #3
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Quote:
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There are some things that are usually still connected when switch is off. Lpg leak detector is one.

Since batteries are new and you intimated that draining has been a problem there is something still connected that is drawing from battery more than just an lpg leak detector.

Try charging batteries fully and then disconnect them. See if issue continues.
Ok thanks
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Old 05-26-2020, 05:11 PM   #4
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As TitanMike said, a lot of little parasitic draws on those house batteries (to add to the list: radios with memories, appliances with memory settings, CO2 detector, etc.). Most if not all of these devices SHOULD be on the correct side of the disconnect switch so they should not get power when the switch is OFF, but . . . .
Also, you didn't mention your battery capacity, but there's 720 hours in a 30 day "month". That means just a 0.1 Amp draw (not that much) drains a 100Ah battery of it's usable capacity (50Ah) within three weeks If your batteries are smaller (or perhaps not fully charged), it may happen even faster or with an even smaller draw.
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Old 05-26-2020, 05:38 PM   #5
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Pick one for your application.
If the circuit is cut off to your batteries, no more dead batteries.

https://www.amazon.com/s?k=battery+d...b_sb_ss_i_5_12
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Old 05-26-2020, 05:40 PM   #6
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It has a red on/off switch. It looks like it turns all off but I guess not.
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Old 05-26-2020, 05:50 PM   #7
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It has a red on/off switch. It looks like it turns all off but I guess not.
No. It doesn't turn everything off. You've got parasitic drains (we all do) that can only be turned off by disconnecting the battery at the battery itself.
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Old 05-26-2020, 06:07 PM   #8
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Understood. Will buy a Battery disconnect tomorrow. Thanks everyone.
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Old 05-27-2020, 10:53 AM   #9
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Or... just pull off the negative cable when putting in storage.
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Old 06-03-2020, 12:17 AM   #10
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Or just get a battery tender. Anytime we have our motorhome sitting by the house, I put a battery tender on it. Works great.
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Old 06-03-2020, 12:58 AM   #11
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Battery Tender

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Or just get a battery tender. Anytime we have our motorhome sitting by the house, I put a battery tender on it. Works great.
x2 I put one on my bike in the rv garage and it keeps the battery charged all winter, with the RV plugged in to shore power. Plus my bike is in its own garage and doesnt take up any space in the garage at home.
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Old 06-03-2020, 08:53 AM   #12
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i had the same problem with batteries draining within a month while in storage. i put in my own disconnect switch that removed all loads and now the battery stays fully charged for months. i think i found five devices in our trailer that we wired directly to the battery and that were not disconnected by the factory installed disconnect switch. they may be small loads but over time they still drain the battery.
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