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Old 04-30-2012, 08:55 PM   #1
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Question for the group

Hello all -

My new x20e is great but we dry camp a good deal and I need more battery power. The tongue on my unit has the battery - group 24 - directly behind the jack then 2 20 lbs tanks. No matter how many times I measure I cannot find room between them and the front of the trailer for 2 batteries. This doesn't really break my heart as I didn't want to load the tongue up with weight anyway.

My WFCO is located under the fridge and over the front axle. Immediately behind it is a floor level cabinet large enough to house 2 6v AGM batteries. I intend to locate the battery bank here and remove the battery from the tongue. I will then wire the new bank into the WFCO and retain the original battery harness to power the runaway brakes. I also see/hope I will benefit from having the batteries closer to the charger. I will run larger cable and improve the charge capacity through this and the reduced line loss.

So my questions. Do I leave the current shunt in place? Do I need a new shunt - fairly certain yes here - and if so what size? I place this on the negative wire running from the battery to the charger? Anything else I missed or need to consider?? Thanks for your help.
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Old 05-01-2012, 10:58 AM   #2
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mainenebula--Don't forget to vent the battery compartment somehow. larry
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Old 05-01-2012, 04:13 PM   #3
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Originally Posted by 19H F250 View Post
mainenebula--Don't forget to vent the battery compartment somehow. larry
With AGM batteries you don't have to vent. The batteries do not off gas when charging. I purchased a AGM battery for this reason.
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Old 05-01-2012, 11:15 PM   #4
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Isn't the break away powered from a pin in the 7 way connector? I didn't think that the TT supplied power to the break away, but rather the TV?
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Old 05-02-2012, 06:43 AM   #5
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Isn't the break away powered from a pin in the 7 way connector? I didn't think that the TT supplied power to the break away, but rather the TV?
Not when it breaks away from the TV. The 7-pin connector provides power to the breaks when stopping normally. It also provides power to "charge" the battery on the camper. But when the pin is pulled on the break-away switch, it draws its power from the camper battery. The same setup is on my utility trailer and my stock trailer. Instead of Deep Cycle batteries, they use little specialized trailer batteries.
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Old 05-02-2012, 08:09 AM   #6
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Originally Posted by clubhouse View Post
Isn't the break away powered from a pin in the 7 way connector? I didn't think that the TT supplied power to the break away, but rather the TV?
When the breakaway is activated it usually pulls the the umbilical chord from the TV
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Old 05-02-2012, 08:12 AM   #7
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Optima recommends installing in a vented compartment....

Joe
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Old 05-02-2012, 05:43 PM   #8
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Thank you Jim and Sean,

Your replies triggered the light bulb in my head to go off. That makes a whole lot more sense then what I "thought" I learned when I picked up our TT...should point out this is our first TT.

During the walk through with the dealer's service guy, I asked about a dead battery and what effected it had on towing. They said none since the 7 pin powered everything. Guess when you have a breakaway you aren't technically towing any longer :-)

Sorry for the deviation on the OPs question.
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Old 05-02-2012, 08:31 PM   #9
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Optima recommends installing in a vented compartment....

Joe

Not exactly. They recommend that the battery be in a ventilated area, not compartment. Unless you charge the battery at a high rate (above 15 amps) or in a very hot area the battery will not off gas.
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2010 Jayco 17Z Ex-Port
2004 Ford Explorer V8 with the tow package
2010 Camping Stats
Nights Camping 132 - Nights Camping in My Z 102
2011 Camping Stats
Nights Camping 107
2012 Camping Stats
Nights camping 133 - Nights camping in my Z 128
2013 Camping Stats
Nights Camping 66 Nights
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Old 05-06-2012, 09:52 PM   #10
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snip.....
So my questions. Do I leave the current shunt in place? Do I need a new shunt - fairly certain yes here - and if so what size? I place this on the negative wire running from the battery to the charger? Anything else I missed or need to consider?? Thanks for your help.
I am puzzled by your question about a shunt.
A shunt is a device normally used when measuring the current flow in a DC circuit. Could it be you refer to the fuse which is wired next to the stock battery?
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