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Old 04-11-2016, 12:48 PM   #11
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My Cardinal came with two 12 volt batteries and the residential refrigerator. No problem keeping the refrigerator runnin full time on our first trip to Florida and back.
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Old 04-11-2016, 12:52 PM   #12
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My Cardinal came with two 12 volt batteries and the residential refrigerator. No problem keeping the refrigerator runnin full time on our first trip to Florida and back.
How many hours did you travel with the inverter on. And how many hours stopping. Did you stop at walmarts or go into campgrounds.
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Old 04-11-2016, 01:05 PM   #13
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So in reality, maybe I'm over thinking this. 2-12 deep cycle sealed batteries wired parallel would be ok. I guess the 4-6s and 4-12s confused everyone. I did not ask correctly. 4-6volt batteries switched out for 2-12 volt deep cycle sealed batteries wired parallel. Correct? And I would only use them with the inverter for the fridge when traveling from one destination to another. No dry camping at all. Am I making sence now. I hope I hope.
I think your question has been answered in one of the latest posts! I would think the 2-12 volt would be sufficient, however you have to keep in mind that those batteries are also used for house power, lights, fans etc. I think?? We don't have a residential fridge in our fifth, and we travel with the fridge off, and at times drive for 6-8 hours a day and the contents remain cool and frozen! Now maybe our temps 75-85 aren't as high as were you will be driving and that could make a difference! Experiment is the only way to know!
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Old 04-11-2016, 06:02 PM   #14
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you have to do some figuring...

4 - 6 volt batteries... read the AH (amp hour rating) on one of the batteries and multiply by 2 (YES 2) to get total power available at 12 volts.

you might have to get online and look... this is a sample taken from the Trojan battery page... the lower amperage you pull from the battery, then the longer the battery will last.
5-Hr Rate
185
10-Hr Rate
207
20-Hr Rate
225
100-Hr Rate
250

2 - 12 volt batteries... read the AH (amp hour rating) on one of the batteries and multiply by 2 to get total power available at 12 volts.

again this is a sample from Trjan battery site for a deep cycle battery
5-Hr Rate
105
10-Hr Rate
118
20-Hr Rate
130
100-Hr Rate
144

As you can see the 6 volt battery has a much higher AH rating than a 12 Volt battery, which means 4 - 6 volt batteries will last much longer than 2 - 12volt batteries and will not be drawn down as low before recharging.

IMO... Going to one 12V battery to power a fridge I don't think is an option, but MAYBE 2 -12 volt will do the job depending on how long you want that fridge powered on.

Personally, I stuff my freezer with hard cold ice, and keep the rest of the fridge stocked well and turn it off for travel. It has lasted that way for over 24 hours without a problem in summer weather, longer in cooler fall weather. It is only a small fridge.

I hope this helps explain what you need to know before makiing a decision
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Old 04-11-2016, 06:19 PM   #15
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Remember that you are not supposed to discharge any lead acid battery beyond 50% of its capacity. A single 12 volt would probably hit that 50% mark in less than 6 hours. IMO, a pair of 12's would be the minimum needed.
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Old 04-11-2016, 06:23 PM   #16
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Two 6v (in series) will provide more AH than two 12v (parallel) for the same footprint.
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Old 04-12-2016, 07:52 AM   #17
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How many hours did you travel with the inverter on. And how many hours stopping. Did you stop at walmarts or go into campgrounds.
Usually travel 6-7 hours a day with short rest stops every 2-3 hours. Short stops OK to leave truck hooked up with inverter on. Dealer told me that if stopping for a long time to unplug the truck to prevent draining the truck batteries. Whenever stopping for the night, have shore power hookup.
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Old 04-14-2016, 09:34 PM   #18
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For the battery gurus.
We do not remote camp. Can I replace 4-6 volt flooded "Power Volt" batteries to 4-12 volt sealed deep cycle batteries. Probably Interstate.
Thanks ahead
Larry

Why are you wanting to replace the 6 volt batteries? Are they bad?
I have a residential fridge and travel with it running on 1 12 volt battery. Remember that it gets charged from your TV while driving.
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Old 04-15-2016, 12:50 AM   #19
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Is it that you want to replace batteries that need maintenance (wet cell) with ones that don't (sealed agm/gel)? If that is the case then replace the 4 6v wet cell with 4 6v agm (sealed) would be my recommendation. There may come a time when you need the power. Last thing you'd want is the contents of the fridge to go bad or draw too much from the batteries (reduces the longevity)

I replaced 2 12v wet cell with 2 6v agm on my class c.

My 2cents
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