Firefighters are investigating what sparked a grass fire in a solar panel field in Kings County.KINGS COUNTY, Calif. (KFSN) -- Firefighters are investigating what sparked a grass fire in a solar panel field in Kings County.The fire broke out just before 12:50 p.m. Saturday near the Avenal cut-off road and 25th Avenue.Fire investigators say about 267 acres were burned in the blaze. It's unclear what caused the fire. Report a correction or typo