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Old 01-31-2016, 07:12 PM   #1
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Battery Control Center question

I'm lucky now to be able to park my coach next to our house. Sometimes I go inside the coach to find something or work on it. So I want to turn on interior lights sometimes. So I keep the coach connected to shore power (house current) to prevent the house batteries from draining over time.
The other day when I was getting it ready for a trip, there was no ignition power. I heard a hum near the BCC. Got AAA to come and jump start. He checked the voltage and it was good, 13.8 give or take.
My question is, could this happen because I disconnect both the chassis and house batteries when I park it with shore power connected? I'm thinking that I don't need to do that since there is a converter that kicks in to keep all the batteries charged. Should I only hit the disconnect switches when I store the motorhome with no shore power?

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Old 01-31-2016, 07:18 PM   #2
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Most likely yes....
What kind of rig do you have?

You are much bettef off to keave the batteries connected when on shore power so they continue to get a float charge.



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Old 01-31-2016, 07:58 PM   #3
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I also keep my coach at home and always plugged in but never hit the disconnect switches. Simply no reason to disconnect if you have available power. They are there to save battery power when in storage.
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Old 01-31-2016, 08:29 PM   #4
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I have a 05 Fleetwood Southwind class A gas.
Thanks..... I'll leave the swithces alone unless I have to store it.
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Old 01-31-2016, 08:29 PM   #5
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Thanks! That's what I thought.
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Old 01-31-2016, 11:15 PM   #6
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Well Sir, since not all coaches are wired the same, one of the things that you may want to check is, whether or not, your house, and or, chassis batteries remain being charged if, you keep on shore power but, turn the battery disconnects off. There are some coaches that do, and some that don't. If you're handy with a volt ohm meter, a simple test will tell you what you need to know.

First, unplug the coach from shore power. Turn on some lights, maybe even the furnace for a few minutes. That will drain the house batteries just a tad. Now, with everything shut off in the coach, and the disconnect switches still ON, take a reading of both your house batteries and chassis batteries.

Now, plug your shore power plug in and, take a reading of both sets. This will tell you what kind of charge your converter putting out. Next, turn off your battery disconnect switches and, then take a final reading. This will determine if, your converter is wired in such a manor that, it will continue to charge either the house batteries or, the chassis batteries or, both sets, even though the disconnect switch is off.

There are some folks on here that think that ALL coaches cease battery charging from the converter or, inverter (depending on what you have) if the disconnect switch(s) are turned off. Well, that's just not so. Some do, some don't.

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