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Old 07-26-2013, 07:42 PM   #1
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Battery problem on 2012 rambler ambassador

I have a 2012 36' Rambler Ambassador and have experienced low battery problems. I am a first time RV owner. I take care to make sure the house batteries have water and are charged. When I leave the RV, I turn off the inverter, batter disconnect switch and the chassis and house battery switches in the rear. A couple of days later, the house batteries are showing 'low battery'. The generator will not start without starting the engine. I had the charging system checked and no problems were found. Any suggestions?

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Old 07-26-2013, 09:09 PM   #2
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Possibly you aren't turning the disconnects off. Maybe aren't working right.
Also, when you disconnect batteries, the converter can not charge them (usually) because they are disconnected, both from giving and taking power.

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Old 07-26-2013, 10:45 PM   #3
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Where do you leave to RV, is it home, can you leave it plugged in?
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Old 07-27-2013, 09:04 AM   #4
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battery problems on 36' rambler ambassador

I leave the rv stored in an indoor storage.

The process I follow when storing is:
making sure the batteries are charged and watered
turn off the inverter
turn off the battery disconnect by front door
turn off the house and chassis battery switches in the rear of coach.

After a few days, the house batteries show low charge. Something is still using power somehow. Or I have bad batteries......?
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Old 07-27-2013, 10:15 AM   #5
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Your batteries could be weak and/or a combination of that and if your battery disconnect does NOT turn power off to the emergency systems, (LP, CO2 and Smoke detectors), which most coaches don't.

If the batteries are fully charged
(12.7v) after surface charge dissipates, then 2-3 days of those systems would not put the batteries in a weak state. Or shouldn't be less than say 12.4v.

Any battery shop can load test them for weakness. I would also verify whether or not your detectors remain powered with battery switch off. If so, you want to remove the cables or take them home during extended storage. For longest life, they should be kept on a trickle charger.
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Old 07-27-2013, 11:03 AM   #6
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I'm wondering why you have three D/C switches.
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Old 07-27-2013, 11:13 AM   #7
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Things to check

Basement lights. Open every door and look.

Closet lights.

Radio off, all the way off. If you can turn the radio on with the power switch on the radio it's not all the way off. Turn it off at the monoplex switch.

If your C0 and LP detector does not beep when you re-connect the batteries it's probably getting power. Those things used to be notorious battery drainers.

Refrigerator off. Especially if you have a 3-way refer.

TV Antenna booster. If you have a video BOMB (box of many buttons) make sure that no buttons are pressed. The boosters are sometimes built into the BOMB.
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Old 07-27-2013, 05:46 PM   #8
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Do you have a Residential refrigerator? If so turn it off with the breaker. It sounds like the inverter is on and the refrigerator is on, that takes about 2 days to run the batteries down.

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