“Andrew Campbell, executive director of the Energy Institute at the University of California, Berkeley’s Haas School of Business, said the water department’s new authority to buy power is ‘very expansive and open ended’ and something that ‘really deserves scrutiny.’…California, he said, ‘is likely on the forefront of a challenge that will probably hit other U.S. states as they move away from fossil fuels and boost how much energy is needed from the grid…Developing an electrical system that is very clean and doing that reliably is a challenge that hasn’t been solved anywhere,’ he said. ‘And California, because it’s so far along with renewable energy development, is hitting that challenge sooner than some other places.'”