LA Times: On a dirt plot near Bakersfield where a massive refinery once churned out gasoline and asphalt, one of the world’s largest oil companies is looking for something more green. On Monday, Chevron Corp. plans to reveal that it has transformed the 8-acre site into a sprawling test facility with 7,700 solar panels. The panels, in various sizes, represent seven cutting-edge photovoltaic technologies from seven companies that Chevron is checking out as possible candidates to power its …