Here is my set-up on my dinghy
, the edges of the flexible panel has a glued on rubber strip to protect the Sunbrella.
So far it works fine. There is a small controller between the panel and the battery
- just for protection. I'm sure that the larger ones works well too - they are probably 3-5% less effective (I'm guessing) but that's ok for me, just buy one that is slightly larger to compensate....
The corner rings rusted almost immediately, once exposed to the weather
, so I would give them some kind of coating before installation