© Reuters. FILE PHOTO: A solar installer carries a solar panel during an installation at a residential home in Scripps Ranch, San Diego, California, U.S. October 14, 2016. Picture taken October 14, 2016. REUTERS/Mike Blake/File Photo
(Reuters) – California utility regulators on Thursday approved a proposal to reduce the rate at which households with rooftop solar panels are credited for exporting surplus power to the grid, a step solar companies warn could slow installations but utilities argue will be fairer for low-income ratepayers.