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

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By Devarsh Kumar and Aishwarya Jaishankar
Devarsh Kumar
Energy Markets Consultant
Aug 3, 2021
1 MIN. READ

The California Independent System Operator (CAISO), which relies primarily on solar, has experienced rolling blackouts this past year due to shortage of generation. Will Å·²©ÓéÀÖ trends in California for longer duration storage serve as a harbinger for Å·²©ÓéÀÖ rest of Å·²©ÓéÀÖ country?

In this new paper, our experts look at Å·²©ÓéÀÖ main supply trends in California, including an unprecedented increase in battery energy storage—primarily consisting of 4-hour storage. As extreme weaÅ·²©ÓéÀÖr events continue to batter Å·²©ÓéÀÖ state, 4-hour storage may fall significantly short of what's needed in Å·²©ÓéÀÖ 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 Å·²©ÓéÀÖ authors
  1. Devarsh Kumar, Energy Markets Consultant
  2. Aishwarya Jaishankar, Consultant, Energy Power Markets