EcoWatch: The fierce counterattack by utilities against the disruptive surge of rooftop solar peaked this month on the West Coast. Californias big utilities successfully petitioned for increased exit fees for cities or counties leaving the utility to purchase electricity for their residents on the open market--typically obtaining greener power with equal or lower rates. (Marin County is offering its residents a renewables mix ranging from 50-100 percent, at an average rate $3/month lower than what PG&E,...