My bimini used to hold a smallish 40w panel wich was swapped for a new 120w one.
I used the same brackets and all, fitted nicely.
The main thing when one is fitting things to a frame, any frame for that matter, if one makes it solid, it is going to brake! If one makes it rubber mounted it is going to last forever. It is even more so on my motorbikes.
So my relatively large (1300×650mm) panel is shaking a bit but it is good. It is transfering very little stress to the bimini's S/S frame.
PS: To you 2tonner, yes, it happened on the front of the terrace of the bar on Saturday morning at Scarborough Qld. Except l was not inebriated at all, l was working on my 'new' yacht.
I had quite a few people laughing while shouting me drinks in the arvo, thou.