I'm not rly convinced that roofs are the best places for solar.

1. Then you need small scale transformers 2. Lots of roofs have shadows on them a lot of the time, like from trees or other nearby buildings 3. Most roofs have to get replaced every 15 years 4. Roof installed solar is fixed in place

I think parking lots, rural empty land and the like are a better starting point that avoids all 4 of these issues.

I have solar on my roof btw.

Rooftop solar has the benefit that you distribute the investment cost over a large number of people, even if the costs are a lot higher than grid-scale installations on the ground.

I'm surprised to hear that you need to replace roofs every fifteen years. What are they made of? The roofs I know last decades longer than that.