[hwillis]

> You still need enough power to cover that, especially if it has been a cloudy/rainy day, or week, or month.

That's besides the point! The window of highest demand completely covers the window of solar. You can build a LOT of solar before storage starts becoming cheaper than just building more solar. You only need storage if it's ALL solar- you can have a majority of your power supplied by solar with hardly any storage! There this idea that if you overbuild solar that power will have nowhere to go, or something- you can just turn it off. You use backup power for the non-shining hours and you're totally fine.

> And this is so easy and foolproof to do, just check out the Iberian power outage.

In fact I did[1]. Page 117: "In fact, in most of the network nodes analyzed, there is no correlation between voltage stability and the amount of solar generation or the amount of coupled synchronous generation"

They had 2.3 seconds of inertia, more than the regulated 2 seconds. Power sloshing through interconnects caused plant ramp rates to be overwhelmed one-by-one, causing the cascading failure, because they had no buffering. If they were all solar or wind plants, the failure would not have happened!

[1]: https://media.licdn.com/dms/document/media/v2/D4D1FAQGcyyYYr...