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> Solar PV is very reliable year long. It is the day-night cycle that requires batteries, for seasonal offset they do not work and probably never will.

You acknowledged that you're wrong in the very same paragraph.

I suspect you're misunderstanding what the word reliable means in this context.

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The word you're looking for is viable.

PVs are very reliable at converting photons to electrons. However if they don't get enough photons, like during night or winter up north, they're not a viable energy source for many uses.

PV and batteries are good for a 24 hour day/night cycle. It's not good for a 365 day surplus/deficit cycle.

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