Dual 6V Batteries.....

SunT@B.  What folding panel did you get?  Had trouble matching the unisolar output to other panels.

Yes, Bob, thanks. I'm VERY new to solar panel use, so am still learning. I'll post a couple of instructional links that others may find useful. 

BTW, the panels on our Roadtrek are three ea. 100-watt panels, total of 300W.

Our T@B didn't have any panels, but if we had kept it I would for sure look into the arrangement you have on your T@B's roof! (I know that on our Roadtrek, those solar panels have been great to have; we almost never have to plug in anywhere.)

http://solarcraft.net/articles/comparing-pwm-and-mppt-charge-controllers/
https://www.solar-electric.com/mppt-solar-charge-controllers.html
And here's another, with some unusual language...  http://www.mpptsolar.com/en/how-to-choose-a-solar-charge-controller.html

Thanks again for giving me the impetus to learn some more!

And here's one more link to an explanation of "cells" in a solar panel: http://www.sungoldsolar.com/News/49.html

If you have the battery cutoff, does B battery + go to the positive wire on the cut off?

@Twojgrams yes battery B + would go to the cut off assuming it's on the positive wire. 

Airliner said:

Which would be a better brand choice Duracell or Energizer?

Go with the lowest price you can find, would be my opinion.

Here are a couple of photos of my two Interstate golf cart size batteries in my aluminum tub.  No modifications needed and the batteries sit tight in place and are as snug as a bug in a rug!  

Michigan_Mike, Great photos, and good wiring diagram also! This will help a lot of folks who never had to do this before. Simple description for both installs: 6 volt, and 12 volt, series versus parallel. Thanks for sharing. I noticed you have the aluminum tub. A couple questions come to mind. 1. Will this install work in the regular tub with the dual 6 volts?, and 2. Do you have a solar connect on your set-up? I don't see one. or maybe I'm just not seeing it. Thanks, Eric

Wizard - You got a pic of duals in the std tub? - Don't recall seeing that before.

ericnliz said:

Michigan_Mike, Great photos, and good wiring diagram also! This will help a lot of folks who never had to do this before. Simple description for both installs: 6 volt, and 12 volt, series versus parallel. Thanks for sharing. I noticed you have the aluminum tub. A couple questions come to mind. 1. Will this install work in the regular tub with the dual 6 volts?, and 2. Do you have a solar connect on your set-up? I don't see one. or maybe I'm just not seeing it. Thanks, Eric

Eric,

I can't comment on the fiberglass tub but evidently they will fit according to Wizard.  

I do have solar ports ports on each side of the tub.  One for my 200W panel, the other for my ARB.

I had two 12v group 27 installed in a plastic tub version and while tight, they did fit.  Had to adjust the base to create enough surface to fit them.  Switched to AGM on interior for other reasons (wanted to reduce tongue weight), but they fit.  In my case, I created some cardboard cutouts of the base of the battery and then moved them around until I found a layout that worked and then custom added pieces to create strong base to hold them.  I installed some battery cord straps to hold them in place.

Here's an old pic I evidently saved (don't recall from when) that has two 6s in the standard tub. Can't recall any of the details at all...

Swung by Costco after work and picked up the two 6v golf cart batteries.   Michigan Mike is right,  they fit perfectly in the Outback tub.  I mean very tight too.  They won't move around at all.  Got a 1 ft. Camco battery cable coming tomorrow, and I'll be able to hook it up and check it out.  This might be the quickest modification to date.   Took longer to cut the seat cushion connectors!  Guessing I just quadrupled the capacity over the tired Group 24 we had. 

My goal was to be able to get two nights out without lugging generator or solar, this ought to do the trick.

Still working for the man, unfortunately ,  so we are mostly doing long weekends.  I'm hoping to avoid even taking the panels or generator in the TV for these trips.  The Group 24 was low after one night of running the Alde on propane from a full charge,  no lights or other use.   Just the Alde pump and parasitic stuff.  We've been weekend boondocking in ski area parking lots, so if we can get 2 to 3 nights without recharging that will be great.  Of course, I'll be dragging the generator along until I'm comfortable with how long they last.

db_cooper said:

Michigan Mike, do you use a battery box or have them secured any way? Or are they jammed in tight?

No battery box needed as both batteries fit in snug.  

Don't ya just love typos - Corrected :-)