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Old 03-17-2015, 01:06 PM   #1
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House batteries replacement

I have a 2003 Bounder, 37U, that is in need of two new 6-volt house batteries. The other two are good. I read on a forum that if your RV is hooked to shore power most of the time and used only to get from home to the campground, it is not necessary to spend a lot of money on deep cycle RV batteries. Buying 6-volt marine batteries would be sufficient. The forum even suggested using 12-volt marine batteries to replace all four RV batteries. As the marine batteries are, also, deep cycle, they can be used. We have owned the MOHO since it was brand new and have dry camped only once in the last 12 years. Does anyone have any thoughts on this?
Thanks to all!! I really appreciate this forum.
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Old 03-17-2015, 02:32 PM   #2
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Batteries

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Originally Posted by advachiel6 View Post
I have a 2003 Bounder, 37U, that is in need of two new 6-volt house batteries. The other two are good. I read on a forum that if your RV is hooked to shore power most of the time and used only to get from home to the campground, it is not necessary to spend a lot of money on deep cycle RV batteries. Buying 6-volt marine batteries would be sufficient. The forum even suggested using 12-volt marine batteries to replace all four RV batteries. As the marine batteries are, also, deep cycle, they can be used. We have owned the MOHO since it was brand new and have dry camped only once in the last 12 years. Does anyone have any thoughts on this?
Thanks to all!! I really appreciate this forum.
I've always replaced all four 6 volt batteries at the same time. Mixing new with old can in effect mix sulfated batteries with new ones. Even if you do an equalizing charge to remove sulfates on the older batteries the plates aren't as clean as those on the new ones. All of that suggests the potential for an uneven draw and charge on the batteries (I assume you now have 4 6 volts), depending on whether the old/new mix of batteries happens to be on the parallel or series wired side (I'm not sure if it makes a difference here).

Regarding switching out 6 volt for 12, I haven't researched that because my battery compartment mounting arrangement is for the 6 volt size.

Over the years I haven't had good luck with Trojans. I read somewhere that the quality isn't what it was years ago - I don't know that for sure except I haven't had good luck with them. The same goes for wolverine and interstate. They just didn't hold up for me.

Several years ago I was having work done at Cruise America RV in Celina, Ohio. The subject of batteries came up and the owner, Kevin Mallory, turned me on to Crown batteries. An industrial battery manufacturer, Crowns are made here in the USA and haven't let me down yet. Another plus is they seem to use less water than my previous batteries.

But like you said, since you don't have a need for extensive battery capacity perhaps most any reputable battery would suffice. Hope this helps.
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Old 03-18-2015, 05:00 AM   #3
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Thanks for your input. Trying to save a little money and get away from having to fill the batteries. Considering how the four 6-volt are wired, it might not be an easy switch to the 12-volt. I will check out the Crown batteries locally.
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Old 03-18-2015, 06:15 AM   #4
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If you never dry camp. You can get by with only 2 6V batteries.
If you have 2 bad ones now. Just take them out of the system and only use the other 2 6V ones that are still good.

How to hook up 4 or 2 6V. with pictures.
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Old 03-19-2015, 04:07 AM   #5
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Thanks, Triker56. I have decided to bite the bullet and replace all four batteries. A local dealer thought I got six years of good service from the ones in the MOHO and gave a break on the price.
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