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Old 04-10-2013, 11:12 AM   #1
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Just Another Battery Disconnect Question (Lexington)

So--I have read at least 50 posts here on the battery disconnect. I have the red, key-type battery disconnect in my Lexington 300ss. It is in the stairwell. Very convenient.

As I understand it there is, even with the disconnect in the off position, a trickle drain on the batteries from a number of sources.

Whenever the Lexington is parked, it is plugged into 110 volt shore power.

Should I leave the disconnect switch in the On position when plugged in?
And, if yes or no, why please?

Thanks in advance.
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Old 04-10-2013, 11:21 AM   #2
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I can't be certain in your MH because of where its wired and maybe yours has a different function than mine, but I leave my switch so that the batteries are not disconnected from the converter while on shore power. I like to keep the batteries topped off and, by disconnecting them, they do not get a charge.

In general, the disconnect is there for when I am not using the trailer.
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Old 04-10-2013, 11:35 AM   #3
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Thanks for the quick response and, I assume, moving my post to the correct forum.

I was clear until your last sentence. What constitutes "not using the trailer"? Mine is always plugged in when parked in my driveway or at a campsite with electric. The only time it won't be plugged in is while driving. Can leaving the switch on do any damage to the batteries if I make sure the 110v is not interrupted for a long time?
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Old 04-10-2013, 02:58 PM   #4
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Quote:
Originally Posted by Wilber View Post
I was clear until your last sentence. What constitutes "not using the trailer"?
Hi Wilber, sorry to get back with you late.

What I meant by "not using the trailer" is that the purpose of a battery disconnect is mainly to protect the batteries from over-discharging when the trailer is not in use (e.g., storing for long periods without shore power).

In your case, your RV is always "in use" or you always have shore power. No need to disconnect them if you have power running through the converter/charger.

The only exception I could imagine is if house batteries in a coach need to be disconnected while on the road or something like that, but I doubt seriously that is the case.
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Old 04-10-2013, 06:35 PM   #5
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Thanks much. The disconnect key is now in the on position.
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