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Old 02-25-2017, 09:31 PM   #1
Holiday Rambler Owners Club
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Batteries plugged in or not

When I park my MH, I turn off my batteries to my coach every time even if I don't use it for two day's or two months.I was told I should plug it in if it will sit for month or two.
The batteries are only 6 months old and I check the water once a week when Im
driving it.If I turn off the power,isn't that good enough!
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Old 02-25-2017, 09:59 PM   #2
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Old 02-25-2017, 10:07 PM   #3
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I keep my house batteries connected to a 120 volt outlet. The inverter/charger keeps them fully charged. I check the water level around every two months. I usually get six years of service out of them.

I have found out that just turning everything off the batteries will go dead on me on the chassis batteries. And then they will not take a charge and start showing a fault.
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Old 02-25-2017, 10:33 PM   #4
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My coach is plugged in all the time when not in use, plus my inverter has been on close to 4 years, don't have to set the microwave clock.
Check my batteries every 2 to 3 months.
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Old 02-26-2017, 08:22 AM   #5
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If I turn off the power,isn't that good enough!
You don't indicate your coach, so hard to know how you are wired.

On many coaches, the house battery disconnect only disconnects 12v devices, not the inverter/converter. So if your inverter is left turned on, it could suck your batteries dead in a number of days. You also could have what is called parasitic drains, where the mfg has wired things directly to the 12v buss and are on all the time (for instance, possibly your propane/smoke detector).

To determine for sure, get a current monitoring device to put on the battery cable and check to see how much current is being taken out of your batteries when you think you have turned off everything.
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Old 02-26-2017, 03:06 PM   #6
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The answer depends on your converter... Now most 21st century RV's have decent converters, but some lower end 20th century units do not.

Mine has a Progressive Dynamics 9180 with optional charge wizard.

Leaving it plugged in near full time (I do spend some time boondocking, perhaps 3-4 weeks over the course of a year) I added distilled water annually when new..... As the batteries aged they need more frequent attention.

I upgraded the batteries and after 9 years replaced the entire bank over a 2 year period... Now have over 2x the capacity and have not added water in 3 years.
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Old 02-27-2017, 08:54 PM   #7
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Batteries plugged in or not

Thank you for your responses.
I forgot to mention my coach is a 2003 Holiday Rambler Imperial 400 ISL tubro
with 6 month old batteries.
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Old 02-27-2017, 09:06 PM   #8
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Leave it plugged in with the batteries on if possible. You also need to make sure that your chassis batteries charge when plugged in. When on shore power with the engine off, you should see 13.2+ volts from the chassis battery. If not, you need a separate battery maintainer, Amp-L-Start, or Echo device.
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