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Old 10-23-2013, 02:42 PM   #1
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House Battery Charging

My 2008 390TS spent an extended amount of time in the repair shop (body shop, actually) and my house batteries have been discharged to the point where the battery disconnect switch will not engage the "use" position. Any ideas whether the main engine alternator will charge the house batteries at least up to the point where I can get the switch to engage and then charge off of shore power?

I don't own a stand alone battery charger and would rather not have to purchase one.
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Old 10-24-2013, 08:55 AM   #2
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DanielJ,
Do you mean the 12VDC on/off switch located in the main entrance or the master switch in the battery compartment?
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Old 10-24-2013, 09:14 AM   #3
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The use/store switch by the front door would not engage. I was told that this was because the house batteries were depleted. I do not know what voltage is necessary for that switch to work.

Since my previous post, I did drive the MH home and the main engine did not charge the house batteries. Fortunately, the alternator did provide 12v to necessary chassis item such as lights, turn signals, etc. I could not, however get the radio and its camera display to turn on ( bummer) so I had to back up the old fashioned way and use my mirrors.

The good news is that once I got it parked and could plug into shore power, I was able to engage the disconnect switch and my batteries are happily charging.
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Old 10-24-2013, 09:21 AM   #4
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They may be happily charging, but have liked suffered significant damage. I would not depend on them to supply much off grid power, but they may be ok for short trips. Not sure about the refrigerator inverter thing but that may be problematical also without an alternator keeping thing charged up.
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Old 10-24-2013, 09:21 AM   #5
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DanielJ,
Good to hear your batterys are charging. If I were you I would keep an eye on them as to be sure they were not depleated enough to cause any lasting damage to them.
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Old 10-24-2013, 09:21 AM   #6
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Stand alone battery chargers are relatively inexpensive and should be a item carried IMO. Kinda like the "Don't leave home without it!"
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Old 10-24-2013, 09:31 AM   #7
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We'll see how it goes as far as continued battery capacity. I've seen that they also sell battery desulfonators which might be cheaper than 4 new batteries. I'll have to wait and see. We have only overnighted single nights at a time without hookups so I don't have much to compare capacity to.
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Old 10-24-2013, 09:34 AM   #8
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Quote:
Originally Posted by OldCoot View Post
Stand alone battery chargers are relatively inexpensive and should be a item carried IMO. Kinda like the "Don't leave home without it!"
X2.
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Old 10-24-2013, 03:03 PM   #9
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I had a similar problem with my house batteries and they never held a good charge again despite my keeping them topped off with water and charging. I decided that I'd had enough with flooded type batteries and made the big investment of replacing them with AGM type sealed maintenance free batteries. I hope they end up being worth it!
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Old 10-24-2013, 09:58 PM   #10
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I've had the same issue.

I started the coach and let it run for about 15 min and then I had enough battery power to start the generator. I let the generator charge the batteries for about 1 hour and shut everything down. The next day house batteries were dead again. After searching the web for a solution I went out to check the batteries and found that our house batteries (4) were quite low on water. I added about 6 qts using a Battery Water Fill Bottle I picked up at an auto parts store. This solved my problem and now the batteries hold a good charge.

Continued battery charging boils off water so make sure you check your water level periodically and add distilled water when necessary.
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