I am certainly aware that crystalline panels are much more efficient when in full sun, unshaded and positioned at the proper angle. How often do these conditions actually exist on a sailboat, though? Also, aren't the demands on the system greatest when it's cloudy anyway? For example, I'll compare a Kyocera KCM85 and a Spectra Flex 32W. Based on their performance sheets, they generate 12 and 4.9 Watts/ft^2, respectively. Wow! Seems to go hands down the Kyocera, no?
What about real world performance? I thought this study was interesting, even though I could only read the abstract:
SpringerLink - Book Chapter
So, spec. sheets indicate a performance ratio of 2.45:1 (watts/area again), but a 12-month test on a fixed, unshaded, south-facing mount indicates a ratio of 1.62:1. Things are changing now, no? Now, what if the panels get shaded and/or are getting less than ideal light most of the time (diffuse light from clouds or no southerly positioning)? Even harder to quantity, what if the light weight and lack of hardware needs of the flexible panels lets you mount them almost anywhere and get them out of the shade? I would love to have data on this, but I'm guessing this ratio might lie in the 1.2:1 to 1.4:1 range for a 12-month period with even better performance on cloudy days (i.e., when you really need it!) Of course, power draws like fridges will be running more on sunny days so better performance in full sun has advantages, too.
Then, there are all the other considerations. Weight, windage, stowability, flexibility in charging configurations, safety, warranties, cost, additional hardware required, etc. I like the idea of easily being able to remove all panels and hardware and stow them below in my limited stowage space. The performance of amorphous panels in terms watts produced per weight carried seems unbeatable. Also, the apparent cost advantage of crystalline panels gets obliterated if you mount them on some serious hardware like a Solar Stik. I don't need anything more to mount an amorphous panel then some extra line. If I can figure out a way to make a solar panel bimini that goes over the boom when on the hook with relatively no extra fabric and hardware, then further savings on cost, weight, and stowage could be achieved and shading would be minimal. That's the dream anyway. I haven't figured out the details, yet.
Regarding the SunWare panels, they have the performance you'd expect from crystalline panels and the large number of cells per panel means that their shade performance is probably much better than say, the Kyocera above. As far as Watts/$ though they cost about as much as a full rollable model. So, if you don't mind taking up the extra space on deck, the rollable ones might have a few more options for mounting and stowing. That's my thinking, anyway.