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Sep 18, 2025 - ISO Minute: `Duck Curve` days



In 2024, it took until after Thanksgiving for New England to rack up 100 duck curve days, when demand for wholesale electricity is lower at midday than overnight.
This year, as the expansion of “behind-the-meter” solar power continues reducing daytime demand, the 100th duck curve happened closer to Labor Day.
In this ISO Minute, Mike Knowland, manager, Forecast and Scheduling, discusses why duck curve days will likely become more common in the years to come.