In 2021, California produced about 200 TWh in-state and imported about 85 TWh, meaning they imported about 30% of total electricity. Not exactly "almost exclusively" imports.
Also, California regulations certainly permit building new power plants (and many new plants have been built in the past decade), just not new coal fired plants.
Also, California regulations certainly permit building new power plants (and many new plants have been built in the past decade), just not new coal fired plants.
https://www.energy.ca.gov/data-reports/energy-almanac/califo...