California ISO | 94,970 followers on LinkedIn. The ISO is a nonprofit public benefit corporation that operates the majority of California's wholesale power grid. | The California Independent System Operator (ISO) manages the flow of electricity across the high-voltage, long-distance power lines that make up 80 percent of California's power grid. We safeguard the economy and well-being of 30 million Californians by "keeping the lights on"​ 24/7. As the impartial grid operator, the California ISO opens access to the wholesale power market that is designed to diversify resources and lower prices.