Looks like from the above the op has already conceeded that his original objectives are not achievable.
Hopefully the op has taken on board some of the comments, the on topic ones at least, made so far. The op should by now have inkling that they have quite a lot to learn about narrowboats and narrowboating.
Some bullet points that may help the op
.I recall that a reply has been given that you can't just occasionally hang 4kw of solar off the side of the boat without there bring significant ballasting problems. I would add to this that i think it would be totally impractical anyway.
Filling the roof totally with solar panels creates a set of problems if traveling alone. I envisage difficulties doing locks solo if access to the roof is blocked, the op should in time begin to understand this point.
Also a completely full roof would make the use of double ropes or even a single topevdifficult to use, again the op should eventually with experience understand this point.
Hopefully the op has now sone understanding of why their original post is fundamentaly flawed.
Hopefully the op will take the comments on board and have a good old mull over them.