If anyone wants to maximise panel area on a non-rectangular roof (a pretty common domestic situation), where can they go to find panels to fill in the wasted areas? I have searched with all combinations of terms I can think of and (with the exception of over optimistic hits from Alibaba - and they claim to have absolutely anything available) I can't find anything. I can't think there can be much of a problem in laying out a triangular array of cells to produce 12V. What's the problem? Is it just not worth while making them? Or does a PF member know of a source?