}
How Can Offshore Wind Help in New Hampshire?
March 25, 2026
Susan Muller
Senior Energy Analyst
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Power in New England is pooled.
Power supply added anywhere in the region helps everywhere in the region.
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Offshore Wind Makes the Grid More
Reliable and Affordable
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How does offshore wind make the grid more reliable?
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“A significant portion of Vineyard Wind is complete and is supplying
hundreds of megawatts to the region. Revolution Wind is also largely complete and the ISO anticipates the project to come online in 2026.
These projects are particularly important to system reliability in the winter when offshore wind output is highest and other forms of fuel supply are constrained.”
ISO New England statement on Department of the Interior offshore wind announcement, ISO Newswire (December 22, 2025) (emphasis added)
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variability
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scale
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Modeled Power from Vineyard and Revolution Wind
January 15th - local delivery of 24,000 MWh
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Source: ISO-NE 21-Day Energy Assessment Forecast, January 14 , 2025
In winter, surges in daily demand increase the risk of a blackout.
Offshore wind can “move the needle” and lower this risk factor.
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# Days with elevated or higher risk: 53
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# Days with elevated or higher risk: 24
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# Days with elevated or higher risk: 13
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UCS Offshore Wind Reliability Studies
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How does offshore wind make the grid more affordable?
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Large amounts of energy with low operating costs.
January 2025
��The market price is driven by operating costs.�� �The grid operator can turn off power plants with high operating costs when offshore wind is added.���This results in a lower market price.�
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“Value of Wind in Winter 2024/2025,” Daymark Energy Advisors for RENEW Northeast (August 2025)
Offshore wind lowers the market price�
Offshore wind lowers the market price�
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“Value of Wind in Winter 2024/2025,” Daymark Energy Advisors for RENEW Northeast (August 2025)
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Offshore Wind Makes the Grid More
Reliable and Affordable