That would certainly simplify the design and installation.
If would also make it easy to cover the panels with plywood if a hurricane was forecast.
The rest of your argument makes sense for a prepper.
My only remaining gripe (thinking as a prepper) is that the panels are still only good for 20-25 years. And batteries would have to be replaced on an earlier schedule.
True about the life span of the panels and batteries, but I would counter by saying technology should be dramatically better in 20-25 years...
I could be wrong but I think the highest number of watts in the top of the line panel is 400, if in 20-25 years it’s 800 watts at the same price or lower, then it would make sense to upgrade, same goes for a battery system.....