EV giant Tesla Inc (NASDAQ:TSLA) had the most new battery electric vehicle (BEV) registrations in California last year than any other automaker with its Model Y SUV reigning as the top-selling vehicle in the state. However, California-based EV startup Rivian Automotive Inc (NASDAQ:RIVN) witnessed the biggest jump in new registrations. What Happened: According to a recent report by the California New Car Dealers Association, Tesla had 230,588 new registrations last year, up 24.6% from the 185,090 registered in 2022. The Model Y was the best-selling vehicle in the state with 132,636 new registra…