Can long-duration storage solve California’s resource adequacy challenges?

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By Devarsh Kumar, Aishwarya Jaishankar, and Dinesh Madan
Aug 3, 2021

The California Independent System Operator (CAISO), which relies primarily on solar, has experienced rolling blackouts this past year due to shortage of generation. Will the trends in California for longer duration storage serve as a harbinger for the rest of the country?

In this new paper, our experts look at the main supply trends in California, including an unprecedented increase in battery energy storage—primarily consisting of 4-hour storage. As extreme weather events continue to batter the state, 4-hour storage may fall significantly short of what's needed in the near future. 

Read on for an in-depth look at:

  • Current assumptions that 4-hour storage provides full resource adequacy (RA) credit 
  • How soon CAISO will start needing long-duration (six hours or longer) storage or risk facing serious reliability challenges
  • The rapidly disappearing lead time for battery energy storage to be extended from four to eight hours

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Meet the authors
  1. Devarsh Kumar, Energy Markets Consultant
  2. Aishwarya Jaishankar, Consultant, Energy Power Markets
  3. Dinesh Madan, Senior Director, Energy Power Markets

    Dinesh Madan joined ICF in 2005 and has been extensively involved in the areas of energy market modeling, wholesale power market assessment, asset valuation and financial modeling, and restructuring and litigation support including contract evaluation and risk assessment.   View bio