Brattle experts were engaged by the California Energy Commission (CEC) to analyze the benefits and costs for California customers due to the expansion of day-ahead markets in the Western Electricity Coordinating Council (WECC).

The study assumes a minimum regional market footprint that includes only the entities with a signed implementation agreement to join EDAM. The authors analyze three other potential regional market footprints that assume different levels of participation in EDAM and Markets+. They find that expansion of day-ahead markets in the WECC creates net benefits for California customers under all scenarios analyzed, with benefits ranging from approximately $100 million/year to almost $800 million/year depending on the market footprint that emerges in the region.

The full presentation, “Preliminary Day-Ahead Market Impacts Study: Impact of Market Footprints on California Customers,” is available below.

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