After some research
I bought two mono 100w Renogy panels
because they are well built and seem to be the panel of choice for a great many RV enthusiast. I chose monocrytaline because it has a reputation of working best even on overcast days without direct sunlight. However, it has since come to my attention that if you have multiple mono panels hooked up in series and a shadow falls across one of them, then it will cause the output to cease on all panels until the shadow passes. Just something to keep in mind.
A very good video (and about 30 minutes long) has this guy who has for years owned about every type of solar panel on the market. He shows and explains in detail the differences of types, and which kinds are best for particular applications.
By the way his top choice are the Renogy monocrystaline solar panels which he uses for powering his cabin