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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #1  
Old 01-15-2017
Rick Davis Rick Davis is offline
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Default 4 vs 6 batts

My house batts are toast. I will get the Lifeline GPL-4D. It currently has six Deka Dominator 4D batts. Since I am traveling I would like to not putz with new cabling configuration at this time, thus I will replace with 4Ds.
Question: given what I think are generally-low house batt needs, it has been suggested I only get 4 batts at this time versus 6, and if I find I need two more I will know soon enough and can add two more when I get back home. Our boon-docking needs are fairly low I would think, in that we do not have an all-electric fridge, we run the Aquahot toe-kick fans some at night, and we have some fluorescent lights and TV on for a while before bedtime. No plans to run ACs, microwave, etc.
Will 4 of these batts suffice for the time being?
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Old 01-15-2017
Flyfisher Flyfisher is offline
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Rick something else you can consider is not investing in expensive AGM batteries since you are not using them in a deep cycle application because you don't dry camp. In my bus the PO installed 4D cranking batteries and I know of another on this site who is very savvy in the electrical engineering world who did the same thing. The down side is checking the water levels in flooded cell batteries is not possible the way the trays are built, at least in my bus its not. I have since changed my coach batteries to Deka AGM batteries though.
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Old 01-15-2017
rshrimp rshrimp is offline
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More food for thought. The Lx's came with only 4 house batteries. Also 4D
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  #4  
Old 01-15-2017
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Mallie Lennon Mallie Lennon is offline
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Rick,
the shipping and installation for 4 is the same as 6. If Money is not the concern, I would replace them all. You get in a situation where you need the battery power, you will be kicking your self that you did not.
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  #5  
Old 01-15-2017
Jim Brookshire Jim Brookshire is offline
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Based on the use you described I think 4 ea 4D size would serve you well. Our M380 has 3 ea 4D's and works very well even with a Samsung refrigerator. Just don't try to run a Dometic on the batteries. Certainly won't bother anything but your wallet to buy 6 however.
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Old 01-16-2017
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Jim,
I'm asking the same question 4 or 6?
My biggest dry camping event is Flywheelers.
Still undecided on the 4 vs 6 issue.
Need to make all new cables and distribution blocks.
Wlii be installing 2 Magnum inverter/chargers & Samsung fridge soon.
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Old 01-16-2017
Jim Brookshire Jim Brookshire is offline
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KC I think you should be able to get by just fine with 4. I would install 4 and see how you make out at Flywheelers. You could then add two more if you think you need them. With LED lights installed, I think the LXI doesn't need any more battery than your old coach.
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  #8  
Old 01-16-2017
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I thought the rule of thumb is when replacing one battery you really should replace them all. Doesn't this apply with our 6 house batteries?
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  #9  
Old 01-16-2017
bubblerboy64 bubblerboy64 is offline
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Quote:
Originally Posted by atckip View Post
I thought the rule of thumb is when replacing one battery you really should replace them all. Doesn't this apply with our 6 house batteries?
What they are suggesting is replacing the six with either of the following: Six new batteries or just four but removing the old six and just using four. NO OLD BATTERIES
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  #10  
Old 01-16-2017
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MRPutz MRPutz is offline
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Quote:
Originally Posted by Rick Davis View Post
My house batts are toast. I will get the Lifeline GPL-4D. It currently has six Deka Dominator 4D batts. Since I am traveling I would like to not putz with new cabling configuration at this time, thus I will replace with 4Ds.
Question: given what I think are generally-low house batt needs, it has been suggested I only get 4 batts at this time versus 6, and if I find I need two more I will know soon enough and can add two more when I get back home. Our boon-docking needs are fairly low I would think, in that we do not have an all-electric fridge, we run the Aquahot toe-kick fans some at night, and we have some fluorescent lights and TV on for a while before bedtime. No plans to run ACs, microwave, etc.
Will 4 of these batts suffice for the time being?
Putz? you rang?

Personally I would NEVER buy or use a gel sealed valve regulated battery (Deka Dominator). I would revert back to the flooded wet cell or go with the AGM's for several reasons;

ONE - Life Span;
2-5 yrs Gelled deep cycle battery life
2-7 yrs Lead acid deep cycle battery life
4-8 yrs AGM deep cycle batter life

TWO - Charge Rate;
Gel cells must be charged at a lower rate (C20) than the other two or they can be damaged
Gel cells must be charged at a lower voltage than the other two
Some companies no longer sell Gel cells

THREE - AGM Advantages
AGM's are recombinant (99%efficient) so almost no water loss
AGM charging needs are similar to flooded cell so not easily damaged
Internal resistance is lower
No maintenace

Four - Costs
AGM's and Gel Cells are about 1.5-2x more expensive than flooded cell

Your Question;
As per your other question about the number of batteries to use the answer is quite simple regardless of your camping style. How much power do you use? You should never take your batteries below 50% (12.06v) so currently what is the lowest state you have found your batteries in the mornings? If you are close to that number then you don't want to down size.

FYI.. if you switch from the Deka Domintor 8G4D to the Lifeline GPL-4D you'll also gain 27 amp hours per battery! :-)

Good info here; https://www.solar-electric.com/deep-...aq.html#Gelled Electrolyte
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