Lots of people who are not exactly high income live in the countryside, too..
Additionally, living in shared housing does not disqualify you from having solar panels installed either - if you live in an apartment complex that's a modestly sized 2x2x2 - meaning it has 4x the surface area, and 4x the roof area, the math generally works out the same - for longer houses, it's better, for taller ones its worse, but I think there are a ton of sweet spots, but tall and skinny apartment buildings will lose out.
Additionally, living in shared housing does not disqualify you from having solar panels installed either - if you live in an apartment complex that's a modestly sized 2x2x2 - meaning it has 4x the surface area, and 4x the roof area, the math generally works out the same - for longer houses, it's better, for taller ones its worse, but I think there are a ton of sweet spots, but tall and skinny apartment buildings will lose out.