> The high rooftop solar price is usually hidden (at least in the USA)

My understanding is that the (unsubsidised) price of rooftop solar is only high in the USA. Because the cost is almost entirely labor (high in the US) and issues around permitting (more restrictive in the US). Pretty much everywhere else in the world you'll now save money with rooftop solar + batteries even if you can't sell back to the grid at all. Even places that aren't that sunny like the UK where I live.

It is still more expensive than "grid scale" deployments. But there are positive externalities that make up for that: uses otherwise unused space, less grid capacity needed, adds resiliency to the grid (if implemented well with storage).