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Old 04-25-2018, 02:06 PM   #1
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Dead battery dilemma

I have two 6V batteries on the tongue of my 2011 15, and am pretty sure they are (or rather were) the originals. Dead as doornails after running an hour so I know they weren't charging fully anymore, but truthfully I've never either measured charge or run on batteries longer than that before so it never even occurred to me to make sure they'd be up to a few days on battery power.

Anyway, assuming they are just not charging fully anymore and need replacing, which I'll check on when I get home, I was thinking of going to one 12V. I almost never camp on battery power for long and lightening up the tongue would be helpful. I know that gives me less battery time- any idea how much less? Also, would it be a simple switch or require what in the way of rewiring?

I am almost completely ignorant about batteries as I had none in my old trailer. I know how they work chemically but nothing much about the rest of the system.
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Old 04-25-2018, 02:39 PM   #2
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Average 12v battery is about 80 amps, the older 2 12v Interstates are 230 amps, so a little more then 1/3rd.

If you have no hookups and need to run the furnace At my current use, I'd say you could do 2 nights if you are careful, depending how cold it is and only discharging down to 50% of capacity, and no solar.

To change to a 12v battery, just discard the current cable that ties the 2 6v batteries and hook + to + and - to - in one of the boxes.

The upgrade path from a single 12v to 2 of them is simple if you find you need more juice down the road.
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Old 04-25-2018, 02:58 PM   #3
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Quote:
Originally Posted by Bobbie54 View Post
I have two 6V batteries on the tongue of my 2011 15, and am pretty sure they are (or rather were) the originals. Dead as doornails after running an hour so I know they weren't charging fully anymore, but truthfully I've never either measured charge or run on batteries longer than that before so it never even occurred to me to make sure they'd be up to a few days on battery power.

Anyway, assuming they are just not charging fully anymore and need replacing, which I'll check on when I get home, I was thinking of going to one 12V. I almost never camp on battery power for long and lightening up the tongue would be helpful. I know that gives me less battery time- any idea how much less? Also, would it be a simple switch or require what in the way of rewiring?

I am almost completely ignorant about batteries as I had none in my old trailer. I know how they work chemically but nothing much about the rest of the system.
Bobbie was looking and at Costco ours anyway ,they have interstate 6 volt batteries a little less at 100 each but a little cheaper in price but less instead of I think 230 they would be 200. Not sure of weight difference . Pat
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Old 04-25-2018, 03:48 PM   #4
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... I was thinking of going to one 12V. I almost never camp on battery power for long and lightening up the tongue would be helpful. I know that gives me less battery time- any idea how much less?
If you don't want the reduction in capacity to be too drastic, you can pick a relatively large 12-volt battery. You can get half your current capacity (at half of the weight), instead of settling for a third (at one-third of the weight).

The stock Escape 12-volt battery is (or was) a Group 24 size, with a Group 29 optional; it now seems to be Group 27. Group 31 is one common size of 12 volt deep-cycle battery which is even larger than Group 29, and yet still much smaller (and so lighter) than a pair of the GC2-sized 6 volt batteries.

Here are some typical weight and capacities, for a common cheap brand:
  • Group 24: 75 Ah, 45 lb
  • Group 29: 90 Ah, 53 lb
  • Group 31: 105 Ah, 59 lb
Some brands have more lead packed into a given size of case, but the relationship is simply more lead = more weight = more capacity.

None of the 12-volt sizes will exactly match the case size of one of the GC2-sized 6-volt batteries, so battery hold-down fit would need to be confirmed, but it can certainly be made to work.
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Old 04-25-2018, 04:34 PM   #5
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I got the ETI Group 29 battery and then added a second battery. They are isolated from each other by a battery selector switch. In use I've never ran out of one battery and had to switch to the other, but it's there as a back-up.

From your description of your usage I think that you'd be just fine with one 12V battery. As Brian says, you can always add a second battery later. The good part is that you can keep them separate and it'd be unlikely that you'd end up in your present situation with 2 dead batteries.

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Old 04-25-2018, 11:51 PM   #6
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Going Simple With A Battery

If you do not really want to learn the battery stuff, go to one battery from Walmart. Flooded batteries are cheaper than AGM's and will probably be a better fit for you. A 200 amp/hour battery would be fine because it will serve you for the few times you need it. Then, every other year, take it back and buy a new one and never think about it again.
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Old 04-26-2018, 12:05 AM   #7
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If you do not really want to learn the battery stuff, go to one battery from Walmart. Flooded batteries are cheaper than AGM's and will probably be a better fit for you. A 200 amp/hour battery would be fine because it will serve you for the few times you need it.
A flooded RV or marine battery from Walmart will work and is about as cheap as is readily available; however, you're not likely to find a 200 Ah 12-volt battery at Walmart, and even if you did you probably couldn't lift it. 100 Ah or less is likely.
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Old 04-26-2018, 12:07 AM   #8
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Originally Posted by j&lgray View Post
If you do not really want to learn the battery stuff, go to one battery from Walmart. Flooded batteries are cheaper than AGM's and will probably be a better fit for you. A 200 amp/hour battery would be fine because it will serve you for the few times you need it. Then, every other year, take it back and buy a new one and never think about it again.
What single flooded 200 amp hour battery is out there?
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Old 04-26-2018, 05:38 AM   #9
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What single flooded 200 amp hour battery is out there?
How about this baby, just eat your Wheaties before you pick it up.
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Old 04-26-2018, 09:32 AM   #10
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Lol wheaties and spinach we used those in the boom lift we used at the company I retired from it used 6 of those beasts
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