California lawmakers will need to address concerns of large investor-owned utilities (IOUs) if they want to advance legislation that accelerates the state’s renewables mandate and requires all electricity sold at retail to come from zero-carbon sources.

Pacific Gas and Electric (PG&E), San Diego Gas and Electric (SDGE) and Southern California Edison (SCE) came out in opposition to Senate Bill (SB) 100, contributing to its high-profile failure to advance in the legislative session that ended earlier this month.