All of the discussions here conveniently ignore the existance of Wind. Which fortunately has higher yield in the months when there is less sun.

Yes, it's a mix. It's always a mix. Arguing that "renewables" = "solar" is a classic straw man.

So is comparing rooftop solar for a single property to grid solar for a country to a continent-sized grid of mixed renewable sources.

Battery and storage tech are barely getting started. Pumped storage is perfectly capable of smoothing out seasonal loads.

There's some capex for physical pumped storage - less than for a nuke plant - but once running it's comparatively low cost.