CA SB423

Requires the Energy Commission to incorporate "firm zero-carbon resources" into its biennial integrated energy policy reports, defined as electrical resources that can deliver zero-carbon electricity with high availability during multiday extreme weather events and support renewable energy integration.

Mandates the Energy Commission, in consultation with the Public Utilities Commission, Independent System Operator, and State Air Resources Board, to submit a comprehensive assessment to the Legislature by December 31, 2023 on firm zero-carbon resources needed to support a clean, reliable, and resilient electrical grid.

Assessment must identify commercially feasible zero-carbon resources, evaluate their role in supporting renewable integration on daily/multiday/seasonal basis, identify development barriers and solutions, and recommend research and incentive changes to support grid reliability through 2045.

Assessment shall evaluate load-serving entities' resource plans under multiday extreme weather events occurring at least once per 10 years and examine energy storage's role in achieving state clean energy goals.

Section 25216.7 establishing the assessment requirement automatically repeals on January 1, 2026 under Government Code Section 10231.5.