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Author Topic: House batteries - how many is too many?  (Read 817 times)

jhoog

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House batteries - how many is too many?
« on: July 19, 2018, 11:20:49 AM »
I am new to the Class A scene, my last class C had one 12V battery to power the house side and one for the chassis and starting power.  my Class A has one for chassis and then it has 6 12V house batteries. I have never seen 6 12V batteries needed for the house side? is that normal or little overkill?
1995 Fleetwood Bounder 34' 460 Located in Norco, California

Optimistic Paranoid

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Re: House batteries - how many is too many?
« Reply #1 on: July 19, 2018, 11:32:07 AM »
Suggests to me that this rig was optimized for boondocking, as opposed to a rig that spends most of it's time plugged into shore power.  Did it, by any chance, also come with solar panels?
Rule #1 for Boondockers: DON'T FEED THE VULTURES!
My Body is a Temple!  Ancient, Crumbling, Probably Cursed...
I don't like to make advanced plans.  They cause the word "PREMEDITATED" to get used in court!

Back2PA

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Re: House batteries - how many is too many?
« Reply #2 on: July 19, 2018, 11:35:54 AM »
I don't think it's possible to have too many batteries!  ;) Only partly kidding. If your battery bank was large enough relative to your charging source(s) (converter and/or solar or even wind) that the batteries didn't routinely reach the "float" stage, that wouldn't be good for battery life
Scott
Fulltiming in a 2005 Newmar Dutch Star 3810, Cat 350
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jhoog

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Re: House batteries - how many is too many?
« Reply #3 on: July 19, 2018, 11:37:52 AM »
it did come with 2 pretty decent sized panels.  All 6 batteries are 7 years old and no good anymore.  I was going to replace them all this weekend and was originally going to just replace them with all new 12V but it seems a little overkill, I typically only dry camp but for maybe 2 days at a time.
1995 Fleetwood Bounder 34' 460 Located in Norco, California

Back2PA

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Re: House batteries - how many is too many?
« Reply #4 on: July 19, 2018, 11:40:19 AM »
I typically only dry camp but for maybe 2 days at a time.

I'd get a pair of 6V golf cart batteries.

Alternatively, but won't last as long, a pair of "deep cycle" (they're not really) 12V batteries at Walmart/Costco/Sams
Scott
Fulltiming in a 2005 Newmar Dutch Star 3810, Cat 350
Eezrv TPMS, 970W Solar, Tri-Metric Battery monitor
2002 Dodge RAM 1500 Quad Cab toad
Stowmaster towbar & Brakemaster toad braking system

jhoog

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Re: House batteries - how many is too many?
« Reply #5 on: July 19, 2018, 11:42:50 AM »
thanks for the advice, I may tape off the other 4 connections and drop to 2 6v golf cart batteries and give it a shot.  I can always add more in sequence if needed.
1995 Fleetwood Bounder 34' 460 Located in Norco, California

Great Horned Owl

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Re: House batteries - how many is too many?
« Reply #6 on: July 19, 2018, 11:44:32 AM »
Too many batteries is when their weight causes you to exceed your GVWR.

Joel
Joel & Dorothy
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Back2PA

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Re: House batteries - how many is too many?
« Reply #7 on: July 19, 2018, 12:02:16 PM »
Too many batteries is when their weight causes you to exceed your GVWR.

Exactly  ;)
Scott
Fulltiming in a 2005 Newmar Dutch Star 3810, Cat 350
Eezrv TPMS, 970W Solar, Tri-Metric Battery monitor
2002 Dodge RAM 1500 Quad Cab toad
Stowmaster towbar & Brakemaster toad braking system

Optimistic Paranoid

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Re: House batteries - how many is too many?
« Reply #8 on: July 19, 2018, 12:16:44 PM »
Too many batteries is when their weight causes you to exceed your GVWR.

Joel

Well, if money is no object, I guess.  But after a certain number, you do hit a point of diminishing returns . . .
Rule #1 for Boondockers: DON'T FEED THE VULTURES!
My Body is a Temple!  Ancient, Crumbling, Probably Cursed...
I don't like to make advanced plans.  They cause the word "PREMEDITATED" to get used in court!

rls7201

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Re: House batteries - how many is too many?
« Reply #9 on: July 19, 2018, 01:15:29 PM »
Your Bounder came with two 6 volt house batteries. The other 4 were add ons. Your 17,000 lb chassis has very little cargo carrying capacity. The numbers are inside the closet door on a 8x11. It's so close that you can't carry a full 100 gallons of water (833lbs) with out being over weight. Don't buy rags for tires. Your coach came with 235/85R16 Michelin XPS all steel cord tires. The only equivalent tire is the Bridgestone Duravis R250 all steel cord. Composite cord tires have too much side wall flex, that you will feel in corners. Off soap box.


jhoog

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Re: House batteries - how many is too many?
« Reply #10 on: July 19, 2018, 01:35:54 PM »
Your Bounder came with two 6 volt house batteries. The other 4 were add ons.

That is what I was trying to figure out.  Thank you.  yea ditching the 4 others this weekend.  As my tires are shot, a bunch of recommendations have come my way for Hankook Dynapro HT that they are a solid tire.  Should I look elsewhere for better tires?
1995 Fleetwood Bounder 34' 460 Located in Norco, California

blw2

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Re: House batteries - how many is too many?
« Reply #11 on: July 19, 2018, 03:06:06 PM »
Too many batteries is when their weight causes you to exceed your GVWR.

Joel

and I would add that the more you have the longer it takes to recharge.... that could be a factor depending on your charging capability and habits
Brad (DW + 3 kids)
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Arch Hoagland

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Re: House batteries - how many is too many?
« Reply #12 on: July 19, 2018, 03:54:23 PM »
Take pictures before you disconnect anything.

Are you familiar with series and parallel wiring and do know how to connect two batteries correctly to get 12 volts output?
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jhoog

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Re: House batteries - how many is too many?
« Reply #13 on: July 19, 2018, 04:33:35 PM »
Take pictures before you disconnect anything.

Are you familiar with series and parallel wiring and do know how to connect two batteries correctly to get 12 volts output?

I am not, I was going to take pictures of the current layout and label the ones I do not use  any longer when I tape them off but as far as correct series and parallel wiring.  I am not familiar with it.  I had planned on taking out one battery and inserting the second using the same connections the previous one was using.
1995 Fleetwood Bounder 34' 460 Located in Norco, California

Arch Hoagland

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Re: House batteries - how many is too many?
« Reply #14 on: July 19, 2018, 05:11:05 PM »
First we have to establish if the six batteries are 6 volt or 12 volt batteries.

Do they have 3 water holes on the top or 6 water holes on the top of them?

2004 Monaco La Palma 36 DBD
W22, 8.1 gas,  Allison 1000 Transmission
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John From Detroit

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Re: House batteries - how many is too many?
« Reply #15 on: July 19, 2018, 05:24:23 PM »
Not a fan of 12 volt MARINE/deep cycle batterries would rather replace them with 6 volt Golf Car. unless that is those are TRUE deep cycle.. (rare in a 12 volt package) but.. That said. Don't repalce till you need to.

IF you ever have to live "off the grid" power wise. (We had 4 hours of no power here last Sunday AM) the more battrery the better you are.. However batteries are HEAVE and take away from your cargo carrying capacity (especially in a gasser) and cost more money to haul around.

Do an energy audit. When you are not plugged in note the LOWEST state of charge.

IF the batteriesd are always over 80 percent.. Well then when you replace 'em cut back a bit.. and go to six volt golf car pairs (you need two six volt in series to make one BIG 12 volt battery).
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darsben

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Re: House batteries - how many is too many?
« Reply #16 on: July 19, 2018, 08:28:17 PM »
That is what I was trying to figure out.  Thank you.  yea ditching the 4 others this weekend.  As my tires are shot, a bunch of recommendations have come my way for Hankook Dynapro HT that they are a solid tire.  Should I look elsewhere for better tires?

What size tires you got on that bounder?
1990 Fleetwood Southwind on P30 chassis located in
Central NY in summer and beautiful Casa Grande AZ in winter

jhoog

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Re: House batteries - how many is too many?
« Reply #17 on: July 20, 2018, 08:33:25 AM »
it is sitting on LT235/85/16 at the moment.
1995 Fleetwood Bounder 34' 460 Located in Norco, California

darsben

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Re: House batteries - how many is too many?
« Reply #18 on: July 20, 2018, 10:10:26 AM »
it is sitting on LT235/85/16 at the moment.

Then I am no help.
1990 Fleetwood Southwind on P30 chassis located in
Central NY in summer and beautiful Casa Grande AZ in winter

Ernie n Tara

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Re: House batteries - how many is too many?
« Reply #19 on: July 20, 2018, 10:40:15 AM »
To answer your question, if you have six Volt batteries (and you will save with them) they connect: chassis ground to 1st  battery negative, then the positive on that battery to the negative on the second battery and finally the positive on the second to house positive. That  gives 12 Volts  total (six plus six in series).

Ernie
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Gary RV_Wizard

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Re: House batteries - how many is too many?
« Reply #20 on: July 20, 2018, 11:15:06 AM »
There is an excellent (and simple!) article in the RVforum Library on battery wiring, serial and parallel, basic or expanded capacity (multiple batteries). With wiring diagrams.

http://www.rvforum.net/miscfiles/batterycon-1.pdf
Gary
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Re: House batteries - how many is too many?
« Reply #21 on: July 20, 2018, 02:33:03 PM »
and I would add that the more you have the longer it takes to recharge.... that could be a factor depending on your charging capability and habits

That is really only true if you have drawn more power out of the larger bank. If you start with a fully charged single battery, or a fully charge large bank, then draw out 100 amp-hours, with the same charger, it will take about the same amount of time to pump that100 amp-hours back into either. Just because you can draw more power out of the larger bank before recharging, doesn't mean that you have to.

Joel
Joel & Dorothy
Retired electronics engineer. Avid photographer, paddler & birder.
2011 Silverado 2500HD, Duramax, 4x4,crew cab, 8' bed
Palomino Puma 253-FBS  27' 5th wheel
1994 19' Class B Horizon / Chevy

99dart

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Re: House batteries - how many is too many?
« Reply #22 on: July 25, 2018, 09:05:43 AM »
I am not, I was going to take pictures of the current layout and label the ones I do not use  any longer when I tape them off but as far as correct series and parallel wiring.  I am not familiar with it.  I had planned on taking out one battery and inserting the second using the same connections the previous one was using.

You will most likely be removing the unused cables. So, there shouldn't be anything to "tape off". Here's an example of different configurations, depending on what you end up installing.
https://www.survivalmonkey.com/threads/battery-bank-wiring-diagrams-6-volt-12-volt-series-and-parallel.37039/
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