Upgrading your battery system - Fiberglass RV


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Old 03-10-2015, 07:40 PM   #1
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Upgrading your battery system

Well it finally warmed up to where I can start doing some modifications. Today I pull out my group 29 battery and installed dual 6 volt batteries. These were purchased at Sam's Club, $84/each, total a/h capacity has been increase from 126 to 215 or useable from 50 to 90, not quite doubling my reserve capacity. I'm also going to add another solar panel since my unit came with the 95 watt solar. Need to wait until it gets warmer to attach to the roof.
I had ordered the extra capacity group 29 with the trailer and because of it's size Escape installed the larger battery box and longer cables. The dual six volts fit perfectly. I removed the dinette seat and the old battery. First you have to remove the 2x4 wood inside the box, slide the battery over and unscrew the box from the floor. This allows you to lift the battery right out.
I installed the dual sixers in series as well as the new Zamp Battery Check which attaches to the negative terminal. http://www.zampsolar.com/solar-acces...ry-management/
There is an APP you download to your iPhone/Ipad for diagnostics. Total time 2 hours.
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Old 03-10-2015, 07:43 PM   #2
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Here are better pictures that can be enlarged
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DSCN2060.jpg   DSCN2061.jpg  

DSCN2062.jpg  
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Old 03-10-2015, 08:31 PM   #3
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Jim
Do you think your WFCO converter charger just make the transition from single to dual batteries, or do you need to change any settings on it?
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Old 03-11-2015, 04:02 AM   #4
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It is still a single battery, just two in series. The Zamp Battery monitor will tell me the state of charge and so on.
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Old 03-11-2015, 07:31 AM   #5
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Very nice, Jim. The extra a/H will be great to have.
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Old 03-11-2015, 09:53 AM   #6
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Just purchased a new Exide group 27 battery at Manards, great price of $84.95! All I need!
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Old 03-11-2015, 12:16 PM   #7
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Looks good.

I'm amazed at how well my solar is working. With all that I have constantly running it's keeping my batteries at 100%.
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Old 03-11-2015, 02:47 PM   #8
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A couple a points of caution:
Two batteries in series may not discharge and charge evenly.
But as long as all the load is taken off @ 12 volts, in series, and the charger is 12 volts, you should be OK. .... as long as there are good connections, and no extra resistance.
The CAUTION is this: IF one battery gets discharged faster than the other, it may not fully recharge, while the other one may overcharge and boil over.
Are the 6volts of the gel style, no maintenance, deep discharge type?
Advise getting a good volt meter, and checking each 6 volt individually from time to time.
WC


Quote:
Originally Posted by cpaharley2008 View Post
Well it finally warmed up to where I can start doing some modifications. Today I pull out my group 29 battery and installed dual 6 volt batteries. These were purchased at Sam's Club, $84/each, total a/h capacity has been increase from 126 to 215 or useable from 50 to 90, not quite doubling my reserve capacity. I'm also going to add another solar panel since my unit came with the 95 watt solar. Need to wait until it gets warmer to attach to the roof.
I had ordered the extra capacity group 29 with the trailer and because of it's size Escape installed the larger battery box and longer cables. The dual six volts fit perfectly. I removed the dinette seat and the old battery. First you have to remove the 2x4 wood inside the box, slide the battery over and unscrew the box from the floor. This allows you to lift the battery right out.
I installed the dual sixers in series as well as the new Zamp Battery Check which attaches to the negative terminal. Batterycheck - Wireless RV & Marine Battery Management.
There is an APP you download to your iPhone/Ipad for diagnostics. Total time 2 hours.
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Old 03-11-2015, 04:30 PM   #9
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That Zamp Solar Batterycheck device looks pretty slick but pricy. If you haven't bought it yet you might take a look at a BVM 700.

http://www.jamestowndistributors.com...t.do?pid=51924

You have to run the wire to the display but half the cost of the Zamp unit.


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Old 03-11-2015, 04:48 PM   #10
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12 V and double a/h with 6 Volt Batteries?

If you have 2 6V in series you get 12V with same ampere hours, or with 2 6 V in parallel you get 6 V with double the ampere hours, so are you doubling the ampere hours at 12 V by using 2 sets in series of 2 6 volt batteries in parallel?
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Old 03-11-2015, 06:31 PM   #11
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The 2x6 v in series gives me 215 a/h @ 12v.
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Old 03-11-2015, 06:32 PM   #12
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Quote:
Originally Posted by Wayne Collins View Post
A couple a points of caution:
Two batteries in series may not discharge and charge evenly.
But as long as all the load is taken off @ 12 volts, in series, and the charger is 12 volts, you should be OK. .... as long as there are good connections, and no extra resistance.
The CAUTION is this: IF one battery gets discharged faster than the other, it may not fully recharge, while the other one may overcharge and boil over.
Are the 6volts of the gel style, no maintenance, deep discharge type?
Advise getting a good volt meter, and checking each 6 volt individually from time to time.
WC
Both batteries are new and lead acid and identical.
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Old 03-11-2015, 08:10 PM   #13
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Actually, each 6v battery is 3 cells so if you really wanted to check individual things, you would need to check each of 6 cells in the two batteries. Not practical, I think. At least if one of the 6 cells goes bad, you only have to replace half of the total battery capacity.
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Old 03-11-2015, 09:08 PM   #14
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2X6v in series doubling both V and A defies laws of physics... something else must be going on or maybe I didn't read your intro right.
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