I don't know what all of the contributors are, but in Brisbane, Oz, where out boat is parked many of the houses have between 15 and 30 solar panels on the roof. It is a very good area for solar with intense radiation, and electricity in the country is pricey since they don't have big hydro installs or nukes. I wonder if there are government rebates when you buy the panels or what? I think a fair comparison would be Queensland and Florida and you rarely see so many solar installations in Florida.
Finished the circumnavigation in early February in Grenada. Have to work on a book project for the next several months so the boat will be waiting for next year.