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PanhandlePlainsman

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Posted: 02/13/21 04:29pm Link  |  Quote  |  Print  |  Notify Moderator

We are in our 3rd fifth wheel now and have boondocked some. New to us 2016 KZ Durango does not have an onboard generator. Plan to get a 2000-2500 watt portable generator. KZ has only one battery and a WFCO 9865 3 stage converter (I've seen it in 13.6v stage and 13.2 stage haven't had battery down enough to see 14.4 yet). We don't use much electricity. Main draw would be furnace over night set at 65 and may stay out about 5 days. We normally run generator about 1 hour in the morning and 2 hours in the evening (watching a movie). We need a new battery. Of these choices A.) Two 6V GC2, B.) One large 12V deep cycle, C.) ONE AGM - which works best? I'm considering which choice will charge sufficiently in three hours per day to keep us going and not damage batteries from undercharging. Have also considered taking a regular battery charger along to plug into the genny.


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Posted: 02/13/21 04:46pm Link  |  Quote  |  Print  |  Notify Moderator

WFCO don't have a good reputation (except it's cheap) and you may never see 14V+. Most 12V deep cycle batteries are marine and usually just a slightly modified starting battery. Is the 12V AGM a deep cycle battery? They are rather expensive. Buy true deep cycle batteries only, they last longer and have more AH. GC2s have about 220 Ah or 110 Ah at 50% SOC.

There are many posts of WFCO, AGM and GC2 that you can search. Also in the archives.

Recommend you dump the WFCO and get a good 3 stage charger to match the new batteries for better and quicker charging.


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Posted: 02/13/21 05:13pm Link  |  Quote  |  Print  |  Notify Moderator

+1 on all that.


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Lynnmor

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Posted: 02/13/21 05:16pm Link  |  Quote  |  Print  |  Notify Moderator

Plus you may need to up size the wires between the converter and the batteries.





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Posted: 02/13/21 05:25pm Link  |  Quote  |  Print  |  Notify Moderator

I agree to dump the WFCO. I have had two TT's with WFCO converters and neither of them would kick into the 14.4 Volt rapid charge mode. One of them stayed at 13.6 volts all of the time. I switched to Progressive Dynamics and am very happy.
I switched to 6 gauge wires between the converter and the battery. I added a dedicated ground wire because the TT only had a small ground that went to the frame, I wanted my 6 gauge wire run straight through. My PD converter only puts out 45 amps so I did not feel the need for 4 gauge wire.


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pianotuna

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Posted: 02/13/21 06:19pm Link  |  Quote  |  Print  |  Notify Moderator

If you need a new battery, camp in the cold, and have room for only one battery, consider using an SiO2.


Regards, Don
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Boon Docker

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Posted: 02/13/21 06:35pm Link  |  Quote  |  Print  |  Notify Moderator

OP- Now to answer your original question.
I would recommend a pair of GC2 batteries.

theoldwizard1

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Posted: 02/13/21 07:49pm Link  |  Quote  |  Print  |  Notify Moderator

Boon Docker wrote:

OP- Now to answer your original question.
I would recommend a pair of GC2 batteries.

Concur !

deltabravo

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Posted: 02/13/21 08:11pm Link  |  Quote  |  Print  |  Notify Moderator

PanhandlePlainsman wrote:

Of these choices A.) Two 6V GC2, B.) One large 12V deep cycle, C.) ONE AGM - which works best?


Two 6v GOlf Cart batteries would be my choice of your three.
Or, two 12v AGMs

1 battery isn't really sufficient for an RV. Even my tiny little truck camper has two batteries. I wish I had space for more.


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PanhandlePlainsman

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Posted: 02/13/21 08:30pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for all of your replies. I have read on another posting that heavier wire or shorter run from converter to battery will help the WFCO kick into the 14.4 or so bulk stage. If not, my thought was to just have a stand alone shop battery charger hooked to the new pair of 6V GC2's (thanks to those three answers to my original question) and plugged into the generator. We don't boondock all that much. Any thoughts?

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