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06-13-2006, 07:50 AM
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#1
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Senior Member
National RV Owners Club
Join Date: Jun 2006
Location: Manhattan Beach, CA
Posts: 695
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I have a 2004 Dolphin on W22 chassis. The dual 6V house batteries need to be replaced. What are the pros/cons of installing dual 12V deep cycle batteries instead of 6v deep cycle? I know the 12V will need to be installed in parallel (+ to +)(- to-) not in series (+ to -)(+ to -).
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Steve & Jeri
2004 Dolphin 5342
2000 Jeep Cherokee 4X4
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06-13-2006, 07:50 AM
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#2
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Senior Member
National RV Owners Club
Join Date: Jun 2006
Location: Manhattan Beach, CA
Posts: 695
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I have a 2004 Dolphin on W22 chassis. The dual 6V house batteries need to be replaced. What are the pros/cons of installing dual 12V deep cycle batteries instead of 6v deep cycle? I know the 12V will need to be installed in parallel (+ to +)(- to-) not in series (+ to -)(+ to -).
__________________
Steve & Jeri
2004 Dolphin 5342
2000 Jeep Cherokee 4X4
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06-13-2006, 09:11 AM
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#3
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Belgian, welcome to irv2
Why do you say you have to replace your 6 volt batts. My 02 coach has the same 6 volt batts and still funtion ok. You can replace them with 12 volt but if your 6's were not keeping a charge your 12's may not either. You should check you chargeing ckt's from GEN, converter and while MH engine is running to see if all are sending charge to your batts. Also check ground wires from batteries to frame,GEN to frame and converter. You may have a loose or dirty connection for a ground some where.
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06-13-2006, 05:03 PM
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#4
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Senior Member
National RV Owners Club
Join Date: Jun 2006
Location: Manhattan Beach, CA
Posts: 695
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Than2s 007, I did check the charing from gen. engine & solar. The engine is putting out between 14.5 after start up to 13.7 after warm up. The gen puts out 13.5. We just purchsed the MH in Jan. When I got it home I checked everything with a fine tooth comb and found one of the 6V batteries low on water. I refilled the batteries and put them on a charger under med. charge. We have been on several trips since then but never dry camping. We just returned from a trip to Joshua Tree and Palm Spings. We were dry camping in Joshua Tree and having problems with the batteries going dead within a few hours with just a few lights on. When we reurned home I recharged the batteries and load tested them. One checked OK the other tested bad. Sooooo, thats the reason I am changing them. I already had 2 new 12V deep cycle batteries in the garage that will fit in the tray very nicely. I have been reading alot of the posts and have learned alot. I see your 007 quit a bit. Thanks for all the great advice and sharing your wisdom
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Steve & Jeri
2004 Dolphin 5342
2000 Jeep Cherokee 4X4
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06-13-2006, 11:38 PM
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#5
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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Belgian, welcome to iRV2.com. We are glad to have you join us here. Ususally you will get more amp hours out of two 6 volt batteries in series than with two 12 volt batteries in parrallel. There is a lot to take into consideration; one would be the cost and since you already have two new 12 volt then I don't see anything wrong with using them for the time being. When they need replacing you may change to 6 volts then. Do some research with the manufacturer of batteries and you will find 50 pages or more of very good technical information about all kinds of batteries; the best being the AGM's. Good luck and enjoy!
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Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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06-18-2006, 09:37 AM
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#6
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Junior Member
Join Date: Apr 2003
Location: Albuquerque, NM, USA
Posts: 23
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Since you already have the pair of 12 volt batteries, I'd go ahead and use them, but they will be somewhat less effecient than two "good" 6 volt deep cycles. I've had a MH with four 12 volt deep cycles and now I have four 6 volt deep cycles and I'd never go back to 12 volt batteries again. YMMV
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hershey
albuquerque, nm
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06-20-2006, 05:04 PM
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#7
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Senior Member
Join Date: Jun 2002
Location: Brick, New Jersey
Posts: 273
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I am not familiar with the later model RV's. I do alot of dry camping with my '93 class A. My two 6V batteries will run the heater fan all night long in 15 degree weather. However, before replacing my converter/charger, I did not have such good performance from my batteries. I think the stock converter was overcharging them. You mentioned one battery was low on fluid. Perhaps yours were being overcharged too. I replaced my stock converter with one that uses the Battery Wizard to charge and maintain the batteries.
http://www.bestconverter.com/product...id=12&catid=39
upgrading from a magnetek 63xx series:
http://home.comcast.net/%7Erabarber/magnetek2.htm
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Rob Hentges
31ft Dutchmen Royal Classic
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06-21-2006, 03:38 PM
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#8
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Senior Member
Appalachian Campers
Join Date: Oct 2003
Location: Cashiers, N.C. USA
Posts: 275
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I was looking at various battiers and came upon this one {8A8D AGM (12V,257AH) RV Battery}
Cost $520.35. What do you think.
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2001 Travel Supreme
36' Diesel
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06-21-2006, 11:43 PM
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#9
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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In my opinion (with it and a $1, I can get a cup of coffee), if one does a lot of dry camping an AGM battery bank is the best way to go. I would also do homework on the brand. Lifeline from what I have heard is very good. Here is a link to help, http://www.dcbattery.com/faq.html
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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