I'm a fan of the composite arches on Schionning cats. It's a much, much cleaner & integrated look. Not to mention far better aerodynamically. Are you in a hurry? If not you could see about getting one of these drawn for you.
And is there not sufficient roof on the cabin
top for enough panels? I can't imagine that there isn't. Mounting them up there simply means that you have to haul your boom forward when anchored so that there's little shadowing. And since there's so much real estate on a cat already, you can optimize your panel placement to minimize this anyway. It certainly worked on my open wing trimaran
, so that my panels only got shadowed if I was being supremely lazy.
I'd just hate to see you add so much parasitic drag to a boat
with such clean & pretty lines. You could tell the teenager to turn down the stereo to cut down on power draw
Edit: I forgot to mention it, but with composite arches, you can have them designed & built so that the panels are recessed right into them. So, virtually zero drag.
And of course stainless arches can be skinned over for lower drag. Or even fair them, prior to adding skins/add faired skins. I don't know why no one does this? They surely would look 1,000% better.
Love your user name. Have always been too chicken to try it out in real life though. Oreos would be hilarous for a while, early on... & then possibly very messy