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04-12-2014, 02:30 PM
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#1
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Senior Member
Join Date: Oct 2013
Posts: 269
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6 Volt Batteries
I just put a pair of 6 volt deep cycle batteries in my 2014 2903 Bay Star. When I plug it in my shop to either a 15 amp or 20 amp it makes that sort of thump noise. It then has almost a small humming noise from the compartment where the cord is. Not in the coach itself just by the compartment. It is a 50 amp cord from my MH to a pigtail to the outlet in the shop. I think I am repeating myself but want to be sure the noise I hear is normal and that I am not doing any damage to the unit. Should not make a difference 12 volt to 6 volt should it? Plug in and charge? Thanks again for helping me!
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04-12-2014, 02:34 PM
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#2
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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Sounds like you have batteries hooked up wrong,
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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04-12-2014, 02:53 PM
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#3
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Senior Member
Monaco Owners Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Jan 2011
Location: Avon Lake, Oh
Posts: 2,958
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What Batteries were in it and by did you add batteries? Take a pic or make a drawing of your current set up, take a pick of drawing and post it here. And yes, its a big difference!
__________________
2000 HOLIDAY RAMBLER ENDEAVOR
40 FT--330HP CAT
2 SLIDES-TOAD 2012 focus
Fulltime-Home is where we park it.
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04-12-2014, 03:19 PM
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#4
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Senior Member
Join Date: Oct 2013
Posts: 269
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6 Volt Batteries
I replaced 2 12 volt deep cycle batteries with 2 Trojan T-105 deep cycle 6 volt batteries. I was told when camping with out power they would hold a charge longer. I put all positive to one battery and all negative to the other battery. These have another post on each battery that I put a jumper on from positive to negative. Does that sound correct? Lights, water pump etc. seem to work fine so I assume it is all right. Let it sit for a 1/2 a day and then drove it in and plugged it in. My other batteries also made a thumping noise but I did not notice a humming noise. It is a very slight humming noise and I really don't know if the 12 volt batteries had the same noise or not. Definitely had the thumping noise though.
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04-12-2014, 03:26 PM
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#5
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Senior Member
Newmar Owners Club Nor'easters Club Appalachian Campers Ford Super Duty Owner Coastal Campers
Join Date: Dec 2007
Posts: 2,463
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The thumping noise is the transfer switch, most likely the humming noise is too. The relays in the transfer switch can hum. If you're not popping your 15 or 20A breaker you're fine.
__________________
Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210
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04-12-2014, 03:26 PM
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#6
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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Who ever told you replacing 2-12 volt deep cycle batteries with just 2-6 volt
batteries is wrong in almost all cases.
If 4-6volt batteries were used then yes a big difference.
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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04-12-2014, 03:29 PM
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#7
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Senior Member
Monaco Owners Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Jan 2011
Location: Avon Lake, Oh
Posts: 2,958
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Sounds like you did it correct correctly. If you have a Surge protector, that's the noise you hear thumping. The surge protector maybe humming. You are putting more amps into those batteries than your other ones, they are rated 225 Ah.
I think you are just fine.
__________________
2000 HOLIDAY RAMBLER ENDEAVOR
40 FT--330HP CAT
2 SLIDES-TOAD 2012 focus
Fulltime-Home is where we park it.
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04-12-2014, 03:31 PM
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#8
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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edited
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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04-12-2014, 03:35 PM
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#9
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Senior Member
National RV Owners Club
Join Date: Feb 2012
Location: Spokane Valley, Wa
Posts: 1,987
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edited
__________________
Art
1999 Trade Winds 7371 Cat 3126B w/current upgrades
1990 D 250 Dodge Ram Cummins Turbo
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04-12-2014, 03:36 PM
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#10
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
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Hi roadtraveler,
Consider going to The 12volt Side of Life (Part 1)
Scroll about 1/3 of the way down the page. There will be a diagram showing you how 2 6 VDC batteries should be connected. Next to the 6 VDC diagram there will be a diagram for 12 VDC batteries. If your 6 VDC batteries are connected as in the diagram, you are good to go. The humming is what has been previously posted. My transfer switch and/or charger hums when connected to low voltage supply.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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04-12-2014, 03:46 PM
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#11
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Senior Member
Join Date: Nov 2011
Posts: 601
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My transfer switch hums because it doesn't know the words.
__________________
Jim and Darlene Wright
plus Ryder,Poodle and
garbage disposal cross
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04-12-2014, 03:46 PM
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#12
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Senior Member
Join Date: Oct 2013
Posts: 269
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Quote:
Originally Posted by GaryKD
Hi roadtraveler,
Consider going to The 12volt Side of Life (Part 1)
Scroll about 1/3 of the way down the page. There will be a diagram showing you how 2 6 VDC batteries should be connected. Next to the 6 VDC diagram there will be a diagram for 12 VDC batteries. If your 6 VDC batteries are connected as in the diagram, you are good to go. The humming is what has been previously posted. My transfer switch and/or charger hums when connected to low voltage supply.
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Thanks you for your help. I did call Newmar and they confirmed so all is well I think. They said 2 - 6 volt is equivalent to 3 + 12 volt batteries. I hope so! Thanks again.
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04-12-2014, 03:52 PM
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#13
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
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Hi roadtraveler,
You are very welcome.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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04-12-2014, 04:36 PM
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#14
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Registered User
Join Date: Mar 2010
Posts: 8,777
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Quote:
Originally Posted by roadtraveler
I just put a pair of 6 volt deep cycle batteries in my 2014 2903 Bay Star. When I plug it in my shop to either a 15 amp or 20 amp it makes that sort of thump noise. It then has almost a small humming noise from the compartment where the cord is. Not in the coach itself just by the compartment. It is a 50 amp cord from my MH to a pigtail to the outlet in the shop.
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roadtraveler
DISCLAIMER: the following information does not mean there is nothing wrong with your coach!
I have owned my coach for 14 years and I tell you that the noises you describe are normal, (on my coach).
It has always sounded "sort of thump noise", (from the compartment where the inverter/charger and tranfer switch live), when I plug into, or turn on, shore power, (whether 15, 20, 30, or 50 amp).
When shore power is going to my coach I can hear a constant "small humming noise from the compartment", (and always have).
If you did not hear the "thump" and "hum" before you changed the batteries there may be something wrong.
Mel
'96 Safari, 132k miles
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