California grid sets record, with 67% of power from renewables

Early Saturday afternoon, renewable sources produced a record 67.2 percent of the electricity on the portion of the state’s power grid controlled by the California Independent System Operator. That figure does not include large hydropower facilities, which added another 13.5 percent. Based in Folsom, the ISO runs 80 percent of the state’s grid. More than half of the renewable energy flowing across the grid at that moment on Saturday came from large solar facilities and wind farms. The ISO’s numbers do not even account for electricity from rooftop solar arrays.