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Old 08-20-2016, 02:51 PM   #1
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6 volt Batteries not compatible...

While at a seminar in Goshen , the presenter, Brian Moran or Drew Stratton, I believe, stated that the WFCO converter in our rig was not built to handle my two Trojan T105 6volt batteries! Too much amperage or something . Does anyone have further info about this?


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Old 08-20-2016, 04:24 PM   #2
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Well, that makes very little sense since the WFCO has a maximum amperage and should protect itself anyway. 2 6 volt batteries are exactly the same as two 12's or even one 12 from an electrical point of view.

That would be like saying that the WFCO can handle a battery up to so many amp hours.
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Old 08-20-2016, 05:10 PM   #3
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There is an urban myth about WFCO converters not going into Bulk mode (14.4v) and not going out of Absorb mode (13.6v). I think this is what those presenters must believe, so they shouldn't be lecturing about RV converters.
Trojan specs call for Bulk at 14.8v, Absorb at 13.6v and Float at 13.2v. Standard RV converters (WFCO, Progessive Dynamics) etc have a Bulk mode of 14.4v, Absorb mode of 13.6v and Float of 13.2v which will not hurt 2 Trojan 6v batteries in series.
You do have a three stage converter with the above specs.
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Old 08-20-2016, 07:13 PM   #4
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It seemed a bit strange to me , especially after reading so much about utilizing 2 six volt versus 2 twelve volt configurations...why would so many knowledgeable RVers advocate for the advantages of T105 or similar "golf cart" batteries if the most common converters would not be compatible ?


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Old 08-20-2016, 07:38 PM   #5
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Those presenters (Brian & Drew) don't have clue and should not be lecturing.
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Old 08-21-2016, 07:03 AM   #6
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Quote:
Originally Posted by Jim Coolyard View Post
It seemed a bit strange to me , especially after reading so much about utilizing 2 six volt versus 2 twelve volt configurations...why would so many knowledgeable RVers advocate for the advantages of T105 or similar "golf cart" batteries if the most common converters would not be compatible ?


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6 Volt batteries in series are 12 volts and thus compatible.
6 Volt batteries can pack larger plates in the same space as 12 volt batteries of the same size. When batteries are wired in series, the VOLTAGE is doubled (but not capacity). When batteries are wired in parallel CAPACITY is doubled but not voltage.

So you always need two of 6 volt batteries in an RV wired as indicated. The converters work just great in 2 six volt battery banks.
Always...
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Old 08-21-2016, 07:16 AM   #7
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Quote:
Originally Posted by Jim Coolyard View Post
While at a seminar in Goshen , the presenter, Brian Moran or Drew Stratton, I believe, stated that the WFCO converter in our rig was not built to handle my two Trojan T105 6volt batteries! Too much amperage or something . Does anyone have further info about this?


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I believe you mis-heard what he said or he mis-spoke.

The converter can supply (depending on model, camper demand, and wire fusing) anywhere from 30 to 60 amps of charging amperage during BULK charge mode. That is plenty for even the largest banks.

NORMALLY, BULK (battery BANK capacity LESS than about 50%) only lasts a few minutes to an hour and the initial battery voltage is high enough to require only 20 - 25 amps in that mode.

In reality, your battery bank would have to be completely dead for full rated charging amperage to be needed and may be interpreted by a converter as a dead short and prevent the converter from powering up at all (or a fuse could blow).

THAT may be what he said; but that is also true for large 12 volt banks as well.
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Old 08-21-2016, 07:18 AM   #8
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Originally Posted by boondocking View Post
Those presenters (Brian & Drew) don't have clue and should not be lecturing.
Seems a little extreme unless you were there to hear what was actually said.
I found them to be well informed and I always learn something new each year.

Remember also they are not teaching a Physics course. Their material is aimed at the new to average RV owner and only get deeper when responding to a specific question "off script". They try not to do that because it confuses the neophytes in the audience.
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Old 08-21-2016, 07:49 AM   #9
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I agree with Herk as to the competency of the presenters. Please do not misunderstand what I am saying, I was just confused by their statement( if I understood correctly) that two 6 V batteries should not be used with the standard converter that comes with most forest river RVs.

Just to clarify, I would like your opinion as to the capacity or efficacy of my converter (attached picture) for charging and maintaining my two 6 V batteries that I have wired in a series in my rig.Click image for larger version

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Old 08-21-2016, 07:51 AM   #10
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Originally Posted by Jim Coolyard View Post
I agree with Herk as to the competency of the presenters. Please do not misunderstand what I am saying, I was just confused by their statement( if I understood correctly) that two 6 V batteries should not be used with the standard converter that comes with most forest river RVs.

Just to clarify, I would like your opinion as to the capacity or efficacy of my converter (attached picture) for charging and maintaining my two 6 V batteries that I have wired in a series in my rig.Attachment 117950


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A 75 amp converter is PLENTY big for even 4 6 volt batteries.
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