Further it’s generally offset by increased Wind power and decreased AC usage, and can be further compensated by increased hydroelectric generation.
This is incorrect for several reasons first we care about Wind + Solar + Hydro not Solar alone.
8X % reduction in solar over 15 minutes sure, but track full days output and it’s not 90% across the full day. Similarly you rarely see 100% of theoretical output over a full day, so it’s really the delta between expected output and minimum output that matters.
Also, you don’t build exactly as much generation as you would need assuming 100% output every single day. That’s just as true for Nuclear/coal etc as it is Solar / wind. Redundancy has a cost, but it can effectively guarantee a surplus.
It will depend on what kind of storm are we talking. Depending on wind speed, wind turbines may need to lock their gearboxes to avoid falling apart.
But arguably yes, increased wind power before and after a large storm perhaps.
You can have prolonged periods of abnormal weather. As an example, across Europe we had months of extremely low wind in 2020:
https://theconversation.com/what-europes-exceptionally-low-w...
Ie: Lots of solar when the wind isn’t blowing
Not always. Over months of low wind, there will still be overcast days, and of course, there's that pesky little issue of the night.
The only question is if you can charge in the day not if there’s clouds at night.