Battery - Fiberglass RV


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Old 11-08-2012, 07:01 PM   #1
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Cool Battery

Hi folks, can someone help me out with batteries. Is it best to go with 2 6 volt deep cycle batteries or 1 12 volt deep cycle for my Trillium.
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Old 11-08-2012, 07:14 PM   #2
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With the two 6V batteries you will at least twice the storage capacity (amp hours of draw). If you are doing a fair bit of boondocking this can be a great asset, but if you were hooked to the grid all the time, not near as necessary.

We have the dual 6V in our Escape 19, and have done 5 days of boondocking many times, and have not anywhere near ran out of power, even with the furnace running some at night.
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Old 11-08-2012, 07:16 PM   #3
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It depends on what your needs are. If you boondock often, use a lot of power and don't have solar panels, two six volt golf cart batteries are best. That assumes you can take the weight and have space for them.

If you plug in, have modest needs and / or a solar panel, stick with a single 12 volt battery.
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Old 11-08-2012, 09:58 PM   #4
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Thanks Jim and Tom for the quick answers. Looks like I'll be going the 6 volt route and going to smaller propane tanks in the front
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Old 11-09-2012, 05:30 AM   #5
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Neither is better?

In order to get the advantages the other guys suggest then it will require twice as much physical battery.

It depends entirely upon your needs.

If you need the extra power reserve for camping off the grid then you will need the extra space for more batteries.
If not then the single 12v battery will be better and you will get the space back.

They both do the same thing,produce 12vdc for camping while not charging.
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Old 11-09-2012, 06:31 AM   #6
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Trojan also makes a 12v golf cart, deep cycle battey; capacity is 150 amp/hours. However, with capacity comes weight, 84#. But it does fit in a Group27 battery box.
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Old 11-09-2012, 07:16 AM   #7
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I looked at Interstate as an example, comparing golf cart 6v and group 27s. The 6v seems to have more amp-hours but it (and other brands) seems to be 1-1/2 to 2 inches taller and take up about 50 cubic inches more space and weigh signifcantly more. And you need two of them to get to 12v. On my trailer thats more weight behind the axle which a Casita 16 doesn't tolerate well. On many other trailers it's over the tongue.

Just for "grins" I'm going to look and see if I can load up a half dozen motor cycle 12v's in parallel to see what that delivers. I'm not expecting much "deep cycle" performance but it appeals to my sense of the absurd.

When I did more boondocking than I do now, and before the Honda 1000, I had a second group 24 in a plastic battery box that I had installed a 7 pin connector on. I just dragged the second battery out and plugged the trailer into it in the evenings.
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Old 11-09-2012, 08:05 AM   #8
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You need to calculate your "battery needs" and then determine how long you want to stay off grid. Sometimes your water or tank capacity will determine that. If you have solar it will charge your group 27 or 29 battery early every day, thereby saving you the costs of replacing your propane tanks, the cost of extra battery and the weight of carrying around another 75 pounds. Go here to determine your needs under "Sizing"
The 12volt Side of Life Part 2
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Old 11-09-2012, 08:38 AM   #9
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I purchased two group 24, 12 V, deep cycle batteries from Costco for $70 each. They are 95 A hr batteries for a total capacity of 190 A hr for $140.
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Old 11-09-2012, 08:40 AM   #10
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Perhaps being missed about golf cart batteries is that they are designed for more discharge cycles and discharge abuse than are other batteries. This comes at the expense of heavier plates and more weight. If you run your batteries down a lot the Golf Cart batteries will survive the abuse much longer.
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Old 11-09-2012, 09:21 AM   #11
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John,

While sorting through your options, and there are scads of them, consider also where you hope to do most of your camping. Solar appeals to the geek in me, and it's an opportunity for me to go nuts with a solar parts catalogue (Hmmm, can I modify my existing tracking telescope mount to hold a panel towards the sun? Somebody stop me before I go too far over the edge!).

However, my favorite campsites are almost always heavily forrested and I'm disinclined to chase a patch of sun around even if I'm hanging around the camp site.

So I went the genny route, picking the quietest available to me at the time.

But even the generator route is fraught with pitfalls, what with conflicting opinions about what is tolerable in noise, expense, camping experience purity, safety (gas transportation), etc.
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Old 11-09-2012, 09:22 AM   #12
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Quote:
Originally Posted by Bob Miller View Post
Perhaps being missed about golf cart batteries is that they are designed for more discharge cycles and discharge abuse than are other batteries. This comes at the expense of heavier plates and more weight. If you run your batteries down a lot the Golf Cart batteries will survive the abuse much longer.


On the other hand, if your tow vehicle 12v battery dies, you have an extra one from your trailer to get you home!!
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Old 11-09-2012, 04:21 PM   #13
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Quote:
Originally Posted by Steve L. View Post
John,

While sorting through your options, and there are scads of them, consider also where you hope to do most of your camping. Solar appeals to the geek in me, and it's an opportunity for me to go nuts with a solar parts catalogue (Hmmm, can I modify my existing tracking telescope mount to hold a panel towards the sun? Somebody stop me before I go too far over the edge!).
Steve

You wouldn't know the Edge if it had a huge sign on it!

Same Here!
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Old 11-09-2012, 04:52 PM   #14
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Battery? Battery?

Batteries, rather power usage while camping depends on many things. You can think of it this way. We all have to live within a monetary budget. We two primary things to make that happen, keep spending within the budget or get a second job and increase the maximum available.

The same principle applies with power usage while off the grid. There are ways to reduce the usage. I manage for months with a Group 24 74 amp hour battery. Here's how.
Most of interior lights and porch light are LED type lights. There's one two light CCFL (the same lights that's in your laptop screen for back lighting). All them together draw about the same amount of current as a single incandescent light that was original.

The other thing I hear is, but I have to charge my (insert multitude of electronic devices). There's another way to keep all those electronic goodies charged, use the tow vehicle to charge them. If you are out long enough to need to recharge them, you'll probably run to the store or some sight seeing place during your stay. That the time to recharge the electronic goodies.

Now the only thing my battery is needed for is a little bit of light and run the fan on the furnace when the furnace is needed. Without the furnace running I can go a couple weeks without needing to recharge the house battery.
At the worst I've been in (a week of temperatures in the teens and dipping into single digits) I had to recharge almost daily. I do that by chasing the sun with a 65 Watt solar panel, which provides about 4 amps charging current.
Generally I can bet by with using the solar panel about every third or fourth day. Which means the solar panel can stay safely stored away most of the time. I don't have to worry about it when I'm off sight seeing, because it's stored in the back of my tow vehicle. I prefer to chase the sun on the days that I need to use it, if I had it on top of the trailer I might be more inclined to want to park in the sun, rather than in the shade.

As for generators, more and more places are limiting generator use or banning them altogether. As solar is improved this trend will continue.

FYI, We stay out without hookups for close to 100 days at a time.
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