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Old 02-03-2015, 09:54 AM   #1
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Removing battery from TT and charging in TV

I am heading to Yellowstone this summer for 10 days of camping at a CG with no hookups. New HTT (Roo 23IKSS, coming in March) will come with one 12 vt battery (I may add a second 12vt or jump to 2x 6 vt?).

But in none of these scenarios can I see running even minimal (LED lighting, H2O pump, fridge, occasional furnace) for 10 days. Also need to close two slides eventually but I suppose I can do that when connected to TV.

Question: We will of course be doing a lot of driving around in YS. My TV has a power outlet in the bed. Does it make sense to remove the battery(s) for the trailer and place in rear of TV and charge via the power outlet? Maybe do this every few days? My outlet is a cigarette lighter thing protected by a 30 amp fuse. Not sure of the wire gauge at this time.

Also looking into solar, generator, etc but don't want to invest right away since we may not be dry camping too often.
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Old 02-03-2015, 10:06 AM   #2
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You might try checking with rental places ( both equipment and party rentals) to see if you can rent something like a Honda 2000 for the week. Running the fridge on battery is not practical as it will deplete the battery quickly.
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Old 02-03-2015, 10:19 AM   #3
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Charging a deep cycle battery through a cigarette lighter type plug would probably take a long time. Plus, if you pull the battery, your fridge won't run even on propane.


If you buy a second 12V, you could run on one while charging the other. Also, look into gas stations in/around Yellowstone. I think for a small fee there are some that will charge your battery. If you have two 12V batteries, this would be a good option.


When we bought our Roo, it came with one 12v battery, so for $95, we bought a second, matching battery at delivery. There are some advantages of 6 volt batteries, but the cheapest thing to do when buying a new tt is just add a second 12v.
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Old 02-03-2015, 11:30 AM   #4
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You might try checking with rental places ( both equipment and party rentals) to see if you can rent something like a Honda 2000 for the week. Running the fridge on battery is not practical as it will deplete the battery quickly.
Thanks Flybob,

When mentioning the refer I was thinking about the parasitic load I have read about. Apparently it uses a couple amps of 12Vt even while running on propane.

Renting (or better yet borrowing) a generator is a great idea. I will certainly investigate.
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Old 02-03-2015, 11:33 AM   #5
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Charging a deep cycle battery through a cigarette lighter type plug would probably take a long time. Plus, if you pull the battery, your fridge won't run even on propane.


If you buy a second 12V, you could run on one while charging the other. Also, look into gas stations in/around Yellowstone. I think for a small fee there are some that will charge your battery. If you have two 12V batteries, this would be a good option.


When we bought our Roo, it came with one 12v battery, so for $95, we bought a second, matching battery at delivery. There are some advantages of 6 volt batteries, but the cheapest thing to do when buying a new tt is just add a second 12v.
Thanks KMP44,

I will definitely buy a second battery. As you point out initially a second 12 vt is the way to go. Do you do much dry camping in your Roo? How long do you expect your batteries to hold out?
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Old 02-03-2015, 11:45 AM   #6
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Kanga, we spent a week in YNP, in our 23SS.
we are veteran dry campers and have a 2 battery setup, Honda 2000w, blue tote tank, 6gall. water jug and 400w inverter.
there's no way you can go 10 days without a generator and tote tank for gray water and someway to resupply water.
PM me if you have any questions.

Thinking you can recharge the battery using an outlet on your truck, iisn't going to work.
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Old 02-03-2015, 12:03 PM   #7
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You've been getting some good info. Adding a second 12v and renting/borrowing a genny is definitely in order. You might consider posting a "wanted" in the classifieds section here, or on craigslist. A lot of folks are holed up for the winter and might loan you a portable for the 10 days.

Even with a genset though, you'll want that second 12v'r to get you through the night without over discharge.
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Old 02-03-2015, 12:04 PM   #8
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Thanks KMP44,

I will definitely buy a second battery. As you point out initially a second 12 vt is the way to go. Do you do much dry camping in your Roo? How long do you expect your batteries to hold out?
With two twelve volt batteries, we have gone 4 days. It was hot, so the cooling fan on the fridge ran almost non-stop, plus the usual parasitic draws, and a few lights. Batteries weren't dead at that point, but drawing them too low can reduce their ability to hold a charge.

Added portable solar panels this year and after 5 days were still in good shape.
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Old 02-03-2015, 12:26 PM   #9
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Have you thought about a solar setup?
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Old 02-03-2015, 01:09 PM   #10
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Harbor freight has a 2cycle gen under $100 we use it from time to time if the power is out for a short time then go the the behemoth gen if it's going to be out for a longer time. We full time in a 40 ft 5er.
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