New England grid saw 134 ‘duck curve’ days in 2025
On sunny days, behind-the-meter solar supplies a significant amount of electricity that otherwise would come from the grid.
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solar
Region’s 100th ‘duck curve’ day migrates to early fall
Duck curves occur when demand is lower at midday than overnight. Last year’s 100th duck curve happened in late November. This year’s was in mid-September.
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Solar power reduced New England power grid demand by 5% in 2024
Contributions from behind-all-meters solar were equivalent to the power consumed by 600,000 homes in a year.
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- solar, system planning
Sunny spring days push grid demand to new lows
“Duck curve” days are happening with increasing frequency and deepening impact as more behind-the-meter solar comes on line.
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- Inside ISO New England
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- resource mix, solar, system operations
ISO-NE expands accounting, forecasting of distributed energy resources
New tools give system planners greater insight into solar power and battery systems that reduce demand for grid electricity.
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- CELT, energy storage, solar
New England grid sees new record low for system demand
It was the fourth year in a row the region notched such a milestone.
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- solar, system operations
100th ‘duck curve’ day marks New England solar power milestone
Duck curve days are becoming more frequent as more New England homeowners and businesses install solar power systems.
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- clean energy, solar, system operations
Carbon emissions from New England power generation fell in 2023, ISO-NE analysis finds
The ISO’s annual report shows emissions have dropped considerably over the last decade.
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- clean energy, environment, natural gas, renewable resources, solar
Explainer: How ISO-NE tracks production from ‘behind-the-meter’ and other solar resources
The ISO’s categories for solar photovoltaic resources focus on how they interact with our control room and the wholesale markets.
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ISO Minute: ‘Duck Curve’ days increase amid growing solar power generation
ISO-NE's Mike Knowland explains why it's becoming more common to see lower demand for grid electricity during the day than at night.
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- ISO Minute, solar