Solar cells are fabricated on crystalline silicon wafers. That is a brittle material. The cute marketing video on the Sunpower website where the guy is folding the wafer works (once) because the cell is very thin. But ask him what happens when you apply constant bending stress to those cells or flex those cells multiple times. Microcracks will ultimately propagate across the cell and it will fracture, often opening the entire cell circuit, which is in series.  Dead module. 

The polymer superstrate used on the "flexible"  modules is not nearly as robust and the glass superstrate used on conventional modules. It will degrade, discolor, and is prone to cupping. Then there is the risk of hail damage. Dead or low performing module. 

The "flexible' modules are intended to be attached directly to a roof or other rigid surface. By not providing back side cooling these modules will run hot, reducing performance and further reducing product life. Much better to use conventional modules in a stand off mounting configuration that allows some airflow to cool the backside.   

Cells in modules are in series, and the current generated by them is proportional to the irradiance they receive, so if the intent is to attach the "flexible" modules to a curved surface like the front part of an rPod, there will be a significant performance degradation because the cells won't all be receiving the same irradiance levels. 

Bottom line, typical manufacturer's warranties on conventional modules are 25-30 years. Flexible ones are 1-5 years. So, if you won't be frustrated if you have to replace your modules every few years at best, and weight is critically important, then "flexible" is the way to go, but be sure you have a way in mind to remove them from whatever they're attached to without causing damage so you can replace them. If not then stick with conventional glass superstrate modules, you'll be a lot happier in the long run. You pay your money and take your chances. 

Do you have a link you can share for the "130w" that you like so much?

Do note that if you go with 6V batteries, the capacity in Ah does not add. Two 100Ah 6V batteries only give you 100Ah at 12V.

If you're not running an inverter, or something that draws a massive amount of current, there's really no advantage to multiple 6V batteries in series. 

That should work very well for you! Anything smaller (unless your in a wide open area) is tough to get back what you use.

I have a 130w (full size, not foldable) and it does very well!

Also dual 6's for plenty of power.

I tend to mention this a bit, it's important if you have not yet. Do an energy audit. See how many amps/watts you actually use. You can estimate it on paper, but a good cumulative meter is better. 

going to use the golf cart batterys. 6V in series.