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Old 05-22-2012, 03:41 PM   #1
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What make/model of house batteries?

Just in case there's a difference between different Georgetown motorhomes.......

Can anyone tell me the make and model of the "house batteries" underneath the entrance steps of a 2010 330TS? My unit is at the dealer's right now, so I can't check, but the dealer says they need to be replaced (manufactured June 2008).

Original equipment was two 12 volt batteries, although I know some members have switched over to 6 volt for various reasons.

I'd just like to know a price comparison, and if possible, does anyone know the price here in Canada, specifically Ontario.

Thanks
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Old 05-23-2012, 12:01 PM   #2
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We just replaced ours at walmart with their deep cycle battery. You might want to call them for a price comparison. Our batteries weren't lasting the night to run the furnace - and at minus 10-20 we needed heat. New batteries not only lasted the night, but several nights.
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Old 05-23-2012, 03:32 PM   #3
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I would expect a new 2012 rig to have batteries no older than 2011. I think you're getting your clock cleaned!

When we got our '02 in '09, the house battery was shot, but I expected that. Even though the battery box was big enough for two batteries, it only had one installed. I biought two new deep-cycle RV/Marine batteries from Costco, along with the necessary battery cables to hook them in parallel. I think they were about $70 apiece.

They're still working fine.
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Old 05-23-2012, 04:32 PM   #4
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I would take the unit to a place that has a load tester and have the batteries checked before replacing them.
Like Frank said "I think your getting your clock cleaned."
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Old 05-23-2012, 05:14 PM   #5
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I have the exact same year and model as you (2010 330TS) and have had no problems so far with the batteries. Curious, were you having it serviced because of battery issues? If not, did you notice anything wrong with the batteries?
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Old 05-23-2012, 05:53 PM   #6
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We use the Group 27 Marine deep cycle from Walmart. Johnson Controls manufactures this battery and has very good ratings.
I have 5 of these on our boat.

120Ah for a 12V

Replacing a battery after 4 years is expected. You can get them to last 6 years, but that's with proper charging and never letting them drop below 50% charge, usually 12.2V when testing without load.

Hope this helps.
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Old 05-23-2012, 05:56 PM   #7
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Ken, Walmart had a sale on recently for that battery for $87 It was the DC 850N
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Old 05-24-2012, 06:00 PM   #8
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These are the batteries that mine had in it when I bought it.

NAPA 8270
- Reserve 180
- 54lbs
- L 12 1/16 x W 6 13/16 x H 8 ⅞
- http://www.napaonline.com/Catalog/Result.aspx?Ntt=8270&Ntk=Keyword&Nty=1&Dn=0&D=8270 &Dk=1&Dp=3&N=0

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Old 05-24-2012, 06:29 PM   #9
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Mine are Exide's.
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Old 05-24-2012, 09:54 PM   #10
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My 2011 327DS came with two batteries with no readily visible manufacturer markings on them. From their size, I expect that they're around 110AH batteries. I've been having problems with an overnight dry camp with the furnace running and had a long talk with the dealer about the problem.

It turns out that the dealer has no way to load test the batteries. They have a tester for the chassis battery but not the house battery! I built my own tester and discovered that the battery has less than a 50AH capacity, I just picked up a hydrometer which shows that the cells are "fully charged" after recharging the battery with my "smart" battery charger. This agrees with what the dealer found when they checked them.

Tomorrow is another load test for the batteries. This time, I'll get individual cell specific gravity measurements in addition to the voltage values taken as the battery discharges. I've already notified the dealer about the problem and his response was that the second battery is probably just as bad and that they'll have to replace them before the factory warranty expires. I'm planning on donating the finished tester to the dealer so they can test batteries for other owners.

In some respects, I'm not surprised about the batteries. When we first looked at the motor home, the sales rep tried to start the generator using the house batteries and couldn't. This means that they had been discharged for an unknown period of time and probably suffered from sulfation. When I had a wiring short in the jack system, it also discharged the batteries and they were left in that state for another couple of weeks until the short was discovered. I suspect that the two full discharges with extended periods discharged have a lot to do with the battery's current capacity.

My next question is about the converter that comes with the motor home. This is the primary mechanism for recharging the batteries and I don't recall if it's really designed to charge the batteries or provide power to run all of the DC stuff. Next time I'm at the motor home I'll have to pull out the documentation for it and see what it says.

Phil
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