I'm amazed that they aren't integrated much more. Roof materials already have a cost. For example, one could create big roof tiles that are mostly solar panel.

I'm amazed that they aren't integrated much more. Roof materials already have a cost. For example, one could create big roof tiles that are mostly solar panel. Edges have to overlap so it's a good idea to not have the panel extend there. One could lay them like other traditional flat panels, in an overlapping fashion. Since the actual panel is so cheap, that shouldn't bring up the cost of the roof panel much. The wiring can be on the underside and can be then connected after construction. (By some other team than roof constructors). After 30 years, they can be swapped. There might be some new technology then. Another alternative would be roll-out plastic panels on ordinary roof materials. External wiring. Everything should be laughably easy if you don't need to deal with snow and ice. They are a whole new design problem. To best limit CO2 emissions, the manufactured panels should be installed in places with best production ability, so freezing tends not to be among the first problems.