Sounds like we need a new wiki page about power generation in general and solar panels in particular. I have created one here:
Power Generation - a Cruising Guide on the World Cruising and Sailing Wiki
I have 4 solar panels aboard my boat:
* 2 x flat 80W panels, "Lensun" brand, on top of the doghouse roof. I purchased these via eBay.
* 1 x monocrystalline panel, 75W Kyocera.
* 1 x polycrystalline panel, 200W Solraiser.
The panels generally give pretty good output. I'm impressed by the Lensun panels, I walk on these a lot because I need to get up on the doghouse roof to set and unset the main sail, and they still produce quite a lot of power. I'm less happy with the Solraiser panel, the peak output from it appears to be about 4A and it is a lower voltage panel (peak output at 12V compared to say 15V for some other panels) meaning that it's less easy to run its full output via an MPPT controller into a 12V system. 2 of these in series might have been a better option.