California solar is responsible for 10% of all energy production in the state?

My old pal Dinah posted this today:

It's kind of an amazing stat: just 1.5 million solar installs in a state with nearly 40 million people is responsible for 10% of all electricity generated statewide. I can't read the reference as it is behind a paywall, but that's an encouraging and incredible stat. For a place so incredibly sunny, it's wild we're not doing everything possible to promote more use of solar in states like California.

update: here's the story on the NYT