Alternating sun and moon exposure.

So Earth spinning very fast

It might be easier to spin the panel.

Micro inverters are a thing: https://enphase.com/en-au/installers/microinverters

They work for individual solar panels.

Yes. These output AC per-panel. Connect'em in parallel. Presumably the amperage is related to the incident light intensity.

Entertaining idea, the panel with a 50Hz fan blade in front of it, but in practice it's much better to not compromise the beautiful simplicity of the photodiode and just stick an inverter on the back.