RELIABLY REACHING CALIFORNIA’S CLEAN ELECTRICITY TARGETS STRESS TESTING ACCELERATED 2030 CLEAN PORTFOLIOS FACT SHEET

The document finds that reaching an 85% clean electricity target by 2030 is feasible and reliable for California, even under most simultaneous stress conditions. Analysis indicates that while solar and battery storage are primary drivers, a diverse portfolio including offshore wind and geothermal reduces dependence on imports and gas. Battery storage specifically reduces the 'duck curve' ramping requirements by an average of 42%. While the state can retire nearly a third of its in-state gas fleet under certain conditions, some gas remains necessary for reliability unless replaced by comparable firm clean resources. The study emphasizes that sharing power with the rest of the Western United States is more optimal than a 'go it alone' approach.

• Achieving an 85% clean electricity target by 2030 is feasible and reliable, with the ability to serve load across most weather years and stress conditions. The only exception occurred when all stress factors—low hydro, reduced gas, limited imports, and retired coal across the West—were combined, resulting in a small amount of unserved load.
• Battery storage is critical for system reliability, as it reduces the need for gas capacity and significantly lowers ramping requirements. Specifically, the evening net load ramp is reduced from an average of 26.8 GW to 15.5 GW, representing a 42% average reduction in 'duck curve' ramping requirements.
• A diverse resource portfolio including offshore wind and geothermal provides benefits by reducing the need for solar (which faces siting challenges), lowering dependence on in-state gas and imports, and reducing reliance on inverter-based resources.
• California can potentially retire nearly one-third of its in-state gas fleet while remaining resource adequate, provided it is comfortable relying on imports without contracts. However, some gas remains necessary for reliability unless replaced by firm clean resources such as biomass, hydrogen, nuclear, or long-duration storage.
• Maintaining power sharing with the rest of the Western United States is more cost-optimal than a self-sufficient approach, as the region has sufficient resources to support California's needs even if coal is retired across the West.

APA

Energy Innovation (n.d.). RELIABLY REACHING CALIFORNIA’S CLEAN ELECTRICITY TARGETS STRESS TESTING ACCELERATED 2030 CLEAN PORTFOLIOS FACT SHEET. https://energyinnovation.org/wp-content/uploads/GridLab_California-2030-Study-Fact-Sheet-for-Printing.pdf

Chicago

Energy Innovation. RELIABLY REACHING CALIFORNIA’S CLEAN ELECTRICITY TARGETS STRESS TESTING ACCELERATED 2030 CLEAN PORTFOLIOS FACT SHEET. n.d. https://energyinnovation.org/wp-content/uploads/GridLab_California-2030-Study-Fact-Sheet-for-Printing.pdf.

Wikipedia

{{cite report |author=Energy Innovation |title=RELIABLY REACHING CALIFORNIA’S CLEAN ELECTRICITY TARGETS STRESS TESTING ACCELERATED 2030 CLEAN PORTFOLIOS FACT SHEET |url=https://energyinnovation.org/wp-content/uploads/GridLab_California-2030-Study-Fact-Sheet-for-Printing.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{energyinnovationndreliably, author = {{Energy Innovation}}, title = {{RELIABLY REACHING CALIFORNIA’S CLEAN ELECTRICITY TARGETS STRESS TESTING ACCELERATED 2030 CLEAN PORTFOLIOS FACT SHEET}}, institution = {Energy Innovation}, url = {https://energyinnovation.org/wp-content/uploads/GridLab_California-2030-Study-Fact-Sheet-for-Printing.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }