Latitude is one factor and population density is another. If the density is low enough and the panels are cheap enough, you can find some essentially worthless

Latitude is one factor and population density is another. If the density is low enough and the panels are cheap enough, you can find some essentially worthless land and install the panels there, and the investment will be worth it. For example, there are currently several multi-square-kilometer solar plants in various stages of planning in Finland.