We're flattered to see our CatNirvana's panels
in the OP, the first image.
Responding to the OP's concerns, we (and others posting
here) have been in very rough weather
with no problems at all with our panels
...other than to wipe the salt
off them afterwards, although even that may not be necessary! In any event, our panels are now >3 years in use and they are one of the greatest additions we put on the vessel. We now rarely need to call on the generator
...and the silence is bliss!
Responding to several other posts in this thread, we spent a long time looking at which panels, and what type. When we were looking the flexible panels were hideously expensive for any sort of decent output -- Although that picture is quite different now, the rigid panels are still better priced for similar quality cells -- and the rigid panels offered both longer life -- Some suggest the flexible panels' life may be as short as 3 years -- and greater output.
The biggest factor favouring our particular panels (SunPower E20's) was output...and, very importantly, output in all the sorts of conditions we experience when cruising, viz. hot weather
, overcast skies and low sun angles. Per square meter of available area (the greatest limiting factor on any vessel of course) the SunPower panels were a 'category-killer' in all conditions...and we are aware of no new developments that would suggest otherwise today.