I suspect a lot of it has to do with housing prices where you live. It's a pretty easy upgrade to a house, and adding $20K to the mortgage for most houses thes

I suspect a lot of it has to do with housing prices where you live. It's a pretty easy upgrade to a house, and adding $20K to the mortgage for most houses these days is trivial. If you are selling, then you can probably even make a pretty decent return on investment because people are willing to tack on such "small" amounts when they buy the home. So until solar panels become a standard that everyone expects in a home, or until the next big market crash, I suspect solar installations will have inflated price tags.