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Old 02-28-2012, 07:57 PM   #21
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Thank you. I will pick this up from Amazon. Just to make sure I understand; which battery terminal gets wired to this switch? Is it the positive terminal, or the negative?

Thanks!
there is alot of debate on which terminal but like the other's have said - Positive terminal

See what size you have on the trailer now - it is either 8 or 10 gauge most likely and go one size bigger (the lower the number the bigger or heavier the gauge wire)

so if you are running 10 gauge or 10ga - get 8 Gauge or 8ga
if it is 8 gauge then get 6 gauge wire.

When I added my single disconnect I bought the wire at Home Depot off there Rack and bought the connectors and heat shrink there as well,
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Old 02-29-2012, 10:26 AM   #22
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Originally Posted by sherdep
so if you are running 10 gauge or 10ga - get 8 Gauge or 8ga
if it is 8 gauge then get 6 gauge wire.
I think I have some extra 6 ga wire around. In this case the bigger the better, right? So 4 ga would work too?

Also, I am thinking of installing one of these http://www.amazon.com/Volt-Meter-Dig...=3O6S9YI5YB6LM amp/volt meters on each of the batteries to see when each are charged and how much. Does anyone have experience with anything like this?

Thanks.
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Old 02-29-2012, 11:44 AM   #23
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Also, I am thinking of installing one of these Amazon.com: Volt Meter/DC Digital LED Amp Volt Meter + Shunt /200V 200A /Blue: Home Improvement amp/volt meters on each of the batteries to see when each are charged and how much. Does anyone have experience with anything like this?

Thanks.
Its a good idea to use something like that in addition to a multimeter.

I currently use a good multimeter to check my batteries, but also use an Equus for a quick check when I don't want to use the MM. Its cheap at $15 and is fairly accurate although very basic.



I've considered installing a TriMetric, which I have seen used on this forum by other members. Its Very Nice, but expensive at $160.



FWIW - Every trailer owner needs to carry a multimeter and know how to use it regardless of these other tools. A good multimeter is a necessity with trailers to diagnose any of the many electrical issues that can and will come up over time.
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Old 02-29-2012, 12:09 PM   #24
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I currently use a good multimeter to check my batteries, but also use an Equus for a quick check when I don't want to use the MM.
I just picked one of these up on Amazon the other day too.

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I've considered installing a TriMetric, which I have seen used on this forum by other members. Its Very Nice, but expensive at $160.
I agree. This looks very nice and has great features, including the deep analysis of the battery, but too large of an expense at this time.

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FWIW - Every trailer owner needs to carry a multimeter and know how to use it regardless of these other tools. A good multimeter is a necessity with trailers to diagnose any of the many electrical issues that can and will come up over time.
So true. I'm picking up another one today to have one in the TT and one at the house.

Thanks again for the great advice.
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Old 02-29-2012, 09:52 PM   #25
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I think I have some extra 6 ga wire around. In this case the bigger the better, right? So 4 ga would work too?

Also, I am thinking of installing one of these Amazon.com: Volt Meter/DC Digital LED Amp Volt Meter + Shunt /200V 200A /Blue: Home Improvement amp/volt meters on each of the batteries to see when each are charged and how much. Does anyone have experience with anything like this?

Thanks.
If you have it laying around I dont see why you couldnt use it even though it is a bit of overkill.

Verify what you have on the trailer first and then figure out what size you need - I think it cost me all of about $10.00 at the most for the wire I used and still had extra left over
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Old 03-01-2012, 07:28 PM   #26
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Drawing of proposed Dual Battery Set-up

Guys,

Hopefully you can tell me if I'm on the right track or not.

From the advice I have gotten here I have drawn a simple diagram of how I propose to hook up my new battery set-up.

Can you please take a look and comment to make sure nothing looks funny (other than the flooded/AGM set-up...I know).

Thanks in advance!
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Old 03-01-2012, 07:37 PM   #27
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Looks about right but I think you need to be able to turn the volt / amp meter's off or they will drain the battery or batteries

If it was me I would only use one volt / amp meter and when you switch to each individual battery you will get your reading and cost you less as well - just my .02

I would have to see what volt / amp meter you are intending to buy to be able to give you better idea on the wiring though
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Old 03-02-2012, 10:03 PM   #28
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Looks about right but I think you need to be able to turn the volt / amp meter's off or they will drain the battery or batteries

If it was me I would only use one volt / amp meter and when you switch to each individual battery you will get your reading and cost you less as well - just my .02
I totally agree. I would love to put one of the volt/amp meters next to the battery switch, but I am not sure how to contect the negative lead.

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I would have to see what volt / amp meter you are intending to buy to be able to give you better idea on the wiring though
Here is the volt/amp meter I'm looking to get:

Amazon.com: Volt Meter/DC Digital LED Amp Volt Meter + Shunt /200V 200A /Blue: Home Improvement

It seems pretty simple: posative lead, one lead on one side of the shut, and another lead on the the other side of the shut.

Any thoughts?
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Old 03-05-2012, 12:37 PM   #29
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Thanks for the suggestion rkswyo.

I think after looking into this that I am going to add an AGM battery inside the TT; currently looking at the Optima Blue-Tops.

One question for any of you that may know:

Our trailer has the WFCO 8955 Converter/Charger. It a 3-stage charger with bulk, absorption, and float modes; 14.4V, 13.6V, and 13.2V respectively. We boondock quite a bit and want to have extra power since on the cold nights with the DW and kids and furnace on, I wake up to a battery that is around 50%.

We currently have the Interstate DP-24 (Group 24) battery, and I want to buy an Optima group 31 AGM battery to wire in parallel with the existing battery.

I know I've read how some people say you MUST have the exact same battery Wired in parallel, and others who said it wasn't a big deal.

Now to my question: can this stock converter I have charge by the lead acid battery I have now AND the AGM battery I am planning to add, if they are wired in parallel?

Thanks in advance!

Broker, I hope I'm not too late with my 2 cents worth but, research your converter thoroughly. Make sure it is capable of handling charge rates of an AGM battery. I work at a large chain auto parts store and we have to change our charger/testers to the AGM setting for proper charging of these batteries.
Good luck with your project and keep us posted.
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Old 03-05-2012, 06:49 PM   #30
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Make sure it is capable of handling charge rates of an AGM battery.
Thanks rracer5. Good call; I have the WFCO 8955 Converter/Charger, and I've been looking all around the web for any way to 'switch' modes from 'Flooded', 'AGM, or 'Gel', but can't find anything. I am going to call the Cheng USA tomorrow to verify.
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