😉

All kidding aside, yes I was probably too general, I'll clarify if I can a little.

When determining if rooftop solar is right for you, there are a lot of variables you need to consider. To name a few: the direction your home faces, the size of your home, number of floors or levels, how your local utility interfaces with you (i.e. how they charge you to still be connected to the grid), when and how much your levels of high energy consumption takes place, how much energy you consume, etc.

ALL of those have an impact on if solar will pencil out vs a local utility. Electricity is a product that has to be produced in the instant it is demanded and consumed. Solar is intermittent meaning sometimes it will produce more energy than you will consume (and excess is sold back to the utility) and at others it will produce less than you demand.

This means even in sunny or hot states (I'll use my own Arizona as an example) the alignment of when solar energy is available will not always align with when energy is at its greatest demand.

I actually am involved in utility scale solar purchase for my company and we procure hundreds, if not thousands of mega watts of solar. It is an incredible resource and extremely inexpensive when it's available. The challenges utilities, companies, or home owners will have is addressing the hours the sun isn't shining and the costs associated with that if you are on solar.

A fun look up is "the duck curve" and how utilities are trying to integrate with the impact of intermittent renewables.