The current post title "For the first time, the state of California was 100% powered by solar+batteries for a full 24 hour period."

Doesn't match the article title/headline

And the article doesn't imply what the current post title says:

sunlight at least partially powered the state for well beyond 24 hours straight.

Just below the above quoted part, the article has a graph detailing how much of the power supplied was solar vs other sources over the course of that day.