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Old 09-28-2013, 08:57 PM   #11
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This mainly relates to older converters. Most newer converters are 2 and 3 stage chargers as well. Having said that, I leave mine disconnected and on a "smart" charger when not in use.
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Old 09-28-2013, 09:02 PM   #12
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do you then reccomend charging thru the converter?the trailer is a 2007,probably has the 3 stage converter.
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Old 09-28-2013, 09:24 PM   #13
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You'll get different opinions on it. Without knowing the model of converter you have, it's hard to say what it's capability is. I would say it wouldn't hurt it at all in the short term...long term could be another story, but all that would be required is to keep an eye on the water levels in the battery (a good habit to be in anyway). When it's just sitting at the house, I use a separate charger that's designed to be left connected for extended periods just leave it plugged in all the time. When I'm plugged into hookups at a campsite, I let the converter do it's thing.

Reading back on your posts, though...I was assuming you were talking about charging in general. If you were asking about strictly charging from a generator, I'd say just run through the converter.
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Old 09-28-2013, 10:17 PM   #14
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the converter on my '07 Roo is a WFCO 3-stage converter and i've been using it to recharge my two 12v deep cycle batteries for 7 years now.

i've never had to use anything else.
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Old 09-29-2013, 06:30 AM   #15
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the converter on my '07 Roo is a WFCO 3-stage converter and i've been using it to recharge my two 12v deep cycle batteries for 7 years now.

i've never had to use anything else.
i will do that.thnx all.
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Old 10-01-2013, 06:54 PM   #16
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You'll get different opinions on it. Without knowing the model of converter you have, it's hard to say what it's capability is. I would say it wouldn't hurt it at all in the short term...long term could be another story, but all that would be required is to keep an eye on the water levels in the battery (a good habit to be in anyway). When it's just sitting at the house, I use a separate charger that's designed to be left connected for extended periods just leave it plugged in all the time. When I'm plugged into hookups at a campsite, I let the converter do it's thing.

Reading back on your posts, though...I was assuming you were talking about charging in general. If you were asking about strictly charging from a generator, I'd say just run through the converter.
just one more thing.the single new{fully charged} deep cycle battery will be running the blower on the furnance on the camper all night.its probably going to be around freezing,or under,at nite.will a recharge{thru the converter} say 2 hr.s recharge it for the next nite?can i wait till the next nite to recharge?thnx
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Old 10-01-2013, 11:14 PM   #17
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You only have about 95 Ah of capacity, maybe less as cold as it will be. You don't want to run them less than half full or you'll drastically shorten their life. That would mean approx. 40 Ah usable for one battery. That furnace is going to kill you. Without looking, I think it'll probably draw around 7A (7 Ah for each hour running). As an example, I always left ours on the bare minimum temp just to knock the chill off and bundled up really well. It ran about 20 min. every hour. If your situation was the same, you'd end up using about 21 Ah of battery in 9 hours with absolutely nothing else running our of your possible 40 Ah. Not enough to make it a second night.

Someone else will have to chime in on converter charging efficiency, because I'm not really up to speed...I believe that they put out around 3A charging and, if that's the case, it would take 7 hours to replace the 21 Ah you used.

If it weren't for the furnace, I'd say a two hour charge every day off of the generator through the converter would be fine to extend you a few days if you were careful. I had said that I would just use the converter before, but that was just to save you from packing another charger. Knowing more about what you're about to do makes me want to say you'd be better off with a higher amp battery charger plugged into the generator 110 in order to get a faster charge.
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Old 10-02-2013, 07:47 AM   #18
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You only have about 95 Ah of capacity, maybe less as cold as it will be. You don't want to run them less than half full or you'll drastically shorten their life. That would mean approx. 40 Ah usable for one battery. That furnace is going to kill you. Without looking, I think it'll probably draw around 7A (7 Ah for each hour running). As an example, I always left ours on the bare minimum temp just to knock the chill off and bundled up really well. It ran about 20 min. every hour. If your situation was the same, you'd end up using about 21 Ah of battery in 9 hours with absolutely nothing else running our of your possible 40 Ah. Not enough to make it a second night.

Someone else will have to chime in on converter charging efficiency, because I'm not really up to speed...I believe that they put out around 3A charging and, if that's the case, it would take 7 hours to replace the 21 Ah you used.

If it weren't for the furnace, I'd say a two hour charge every day off of the generator through the converter would be fine to extend you a few days if you were careful. I had said that I would just use the converter before, but that was just to save you from packing another charger. Knowing more about what you're about to do makes me want to say you'd be better off with a higher amp battery charger plugged into the generator 110 in order to get a faster charge.
thats what i thought.i don't have room on the trailer to install a second battery,but,i can however,when set-up,set in on the ground then hook up the jumper wires.what you say?
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Old 10-02-2013, 08:34 AM   #19
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That would work fine provided:

1. Both batteries are the same size, type, and age.
2. Connected in parallel (+ to +, - to - ).

If they're not the same size and what not, you can always just swap them out as needed and use them one at a time.

If you do end up connecting them together, I'd make sure they were protected from the elements (covered / water tight). Also, get a multi meter and periodically check the voltage on them after they've been sitting a little while with no load on them. Full should be around 12.7 - 12.9 and you don't want them to get below about 12.1 - 12.2 V. As soon as you get home, get them fully charged up. Going too low too often and leaving them partially discharged will have you replacing them after a year instead of five or more.
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Old 10-02-2013, 08:35 AM   #20
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You need to find out what model of converter you have. They are not low-amp chargers. My Progressive Dynamics can be from 30 to 80 amps (but the battery probably isn't going to pull that much). They state that a discharged battery will be recharged to 90% within 2-3 hours. (It can take up to 12 hours to get the last 10%.)
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