Note that you don't necessarily have to put the panels and the batteries at the same place. You can, and there are benefits like DC <-> AC conversion, but you c

Note that you don't necessarily have to put the panels and the batteries at the same place. You can, and there are benefits like DC <-> AC conversion, but you could in theory de-centralize solar more than you de-centralize battery storage. And there may be some scale advantages there, especially since some storage technologies involve putting things underground, or high temperatures which are a safety concern like with molten salt, etc. Caveat: I'm just a layman about this stuff.