24 April 2025

Battery Revenues in CAISO: How much are Resource Adequacy capacity contracts worth?

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Battery Revenues in CAISO: How much are Resource Adequacy capacity contracts worth?

Resource Adequacy contracts provide over half the revenue for most battery energy storage systems in California today.

But these contracts are privately negotiated bilateral arrangements - it’s not always clear how much resources are earning, or how new contracts should be priced.

And with the “Slice-of-Day” change to the RA program, the way batteries participate in the program is undergoing a major shift.

Subscribers to Modo Energy’s research can read this report to understand:

  • How much revenue batteries earn from their Resource Adequacy contracts today, and why contract prices have risen by 75% over the past five years,
  • Why the new “Slice-of-Day” reforms to the Resource Adequacy program are changing how batteries participate,
  • And how the value for new capacity contracts is expected to evolve in the years ahead.

Readers can access the data behind each chart, including a database for all battery capacity contracts active in California. Find the link at the bottom of the article.

This article discusses how much capacity contracts contribute to grid-scale battery energy storage revenues in CAISO. To learn more about the RA program and how batteries can participate, read our previous article: Resource Adequacy: How it works, how you’re paid, and how to apply.


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