CA SB456

Requires retail electricity suppliers to disclose total electricity purchases from in-state generation sources and out-of-state generation sources separately to consumers

Adds electricity dispatched from energy storage systems as a new category in the disclosure requirements, alongside existing fuel sources like coal, natural gas, nuclear, and renewables

Mandates disclosures be made annually to end-use consumers by the end of the first complete billing cycle in the third quarter, consistent with information provided to the Energy Commission

Applies to all retail suppliers offering electricity for consumption in California, including product-specific written promotional materials distributed by print or electronic means