Interesting stuff, some of which I agree with, though for different reasons than yours I think, and some of which is obviously incorrect, for example: "After all, solar energy costs nothing after establishment of the required solar power infrastructure."

Like all techno-industrial infrastructure, there are ongoing maintenance and repair and replacement costs, in money and/or materials. All of which require the same extractive and polluting activities as the original manufacturing of the solar panels, wire, electronics, fuel cells, etc., along with their transportation over long distances, requiring all the vehicle and road infrastructure to be maintained and repaired as well. And initially this will have to be created within our existing economy, so it will be paid for by creating debt, thus will not be free in that sense either.