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Old 04-28-2015, 10:41 AM   #31
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I use a CPAP which uses 6.7amps from 12v battery dry camped. My onboard Cedar Creek charger was only producing 2 amp charge on shore power, therefore draining to less than 12 volts. My AGM battery was not charging. Read AGM blogs and learned it really needs 10 amp charger to keep up. Was successful tricking charger with good 12v battery wired parallel and connecting to 10 amp charger restored my battery to full charge. Now I connect another charger (after cutting off onboard charger with disconnect switch) to restore battery after dry camp.
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Old 04-28-2015, 01:20 PM   #32
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Thanks for all the info!!! I think we will look into a generator. We do a lot of National Parks(that is why we have a small tv). The dealer mislead us on the ability to dry camp. We also picked up 2 more batteries!!! Yellowstone here we come!!!
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Old 04-28-2015, 03:26 PM   #33
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Thanks for all the info!!! I think we will look into a generator. We do a lot of National Parks(that is why we have a small tv). The dealer mislead us on the ability to dry camp. We also picked up 2 more batteries!!! Yellowstone here we come!!!
Watch your weight. 3 batteries are pretty heavy.

Make sure they are "marine" or "deep cycle" and not starting batteries.

Here are some tips on how to wire them up and why.
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Old 04-28-2015, 03:37 PM   #34
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Were are you going to put the extra batteries? With the V nose it looks like one battery just fits on the tongue.
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Old 04-28-2015, 03:38 PM   #35
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We are going to put them in the truck and switch out as needed!!!
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Old 05-02-2015, 10:57 AM   #36
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RPAspey I had the same problem and as soon as I turned the switch off it improved by battery life
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Old 05-03-2015, 08:27 AM   #37
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Big warning. If you decide to do this and plan on staying in the camper "at all", you must also power the propane leak detector. It uses camper battery 12 volt power. A leak at the fridge could be fatal.
You are right and I had not thought about this possibility. I will consider this in any solution.
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Old 05-03-2015, 08:42 AM   #38
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We are going to put them in the truck and switch out as needed!!!
Some cautions:

1) Starting type batteries are not appropriate for this application. The plates are too thin and they have too much surface area to store more than a few hours of total charge. They are designed to give up 30-40% of their total capacity in a few minutes; then recharge in about 30 minutes of driving on the alternator.

Marine (Dual Purpose) or true deep cycle batteries are the way to go. They have thicker plates and hold lots more charge for longer life under discharge.

2) If you are going to keep your spare(s) in the bed of your truck, keep it (them) secured and supported (styrofoam?) to avoid cracking the plates from road shocks.

3) You might want to look at some "quick connect/disconnect" solutions for the batteries. http://www.amazon.com/Driver-Battery.../dp/B007JMTS14 so you don't damage the terminals.

4) You should also rig some kind of trickle charging system (using the truck's power) in the truck bed using the same type of connectors to keep them topped off while driving.
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