Avangrid Renewables, LLC - Dukes County - ISONE
The project began delivering power in January 2024, completed offshore construction in March 2026, and reported 780 MW producing and selling energy as of June 30, 2026. Buried submarine and onshore cables connect the project to a 115 kV interconnection in Barnstable.
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Canonical EIA plant baseline.
plant-63093
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| VW01 | 800 MW 800 MW summer | Offshore Wind Turbine Wind · WS | Apr 2026 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
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Project milestones and public references behind the asset profile.
BOEM awarded Lease Area OCS-A-0501 (166,886 acres) to Offshore MW LLC at a competitive auction held January 29, 2015. The lease was signed March 23, 2015 and became effective April 1, 2015.
Avangrid Renewables agreed to acquire a 50% ownership interest in Vineyard Wind from Copenhagen Infrastructure Partners. After closing, Vineyard Wind remained a 50/50 joint venture with 50% Avangrid and 50% split between CI II and CI III.
The Departments of the Interior and Commerce announced approval of construction and operation of the first large-scale, offshore wind project in U.S. waters, the 800-megawatt Vineyard Wind 1 Offshore Wind Energy Project located in the northern portion of Lease Area OCS-A-0501.
Vineyard Wind 1 reached financial close with approximately $2.3 billion of senior debt from nine international and U.S. banks to finance project construction. Lead arranger Santander advised; counsel was Norton Rose Fulbright. Participating lenders included Bank of America, J.P. Morgan, BBVA, NatWest, Santander, Crédit Agricole, Natixis, BNP Paribas, and MUFG Bank.
BOEM completed review and approved Vineyard Wind 1's revised Construction and Operations Plan (COP) covering blade removal from up to 22 wind turbine generators. BSEE lifted the suspension order on the same date, allowing continued power production and blade installation.
BOEM's Acting Director issued a Director's Order to Vineyard Wind 1 LLC suspending all ongoing activities related to the Vineyard Wind 1 Project for 90 days for reasons of national security.
EIA-860 lists generator VW01 with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Vineyard Wind 1 has a reported capacity of 800 MW. Source: EIA Form 860M.
Vineyard Wind 1 is a Offshore Wind Turbine facility in Dukes County, MA, participating in the ISO-NE market.
Vineyard Wind 1 is in Dukes County, MA, inside the ISO-NE balancing area.
Vineyard Wind 1 is operated by Vineyard Wind 1 LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Vineyard Wind 1 reported 245.6 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.
By capacity, Vineyard Wind 1 ranks #1 of 3 operating plants of the same technology nationally.
Avangrid finalized agreements to assume responsibility as the operations and maintenance services provider and asset manager for Vineyard Wind 1, with Operations and Maintenance Service Agreement and Asset Management Agreement designating Avangrid as responsible for overseeing the operation and management of the facility once construction is complete and commercial operations begin.
Vineyard Wind began offshore construction in late 2022; steel-in-the-water was achieved in June 2023, and the offshore substation was completed in July 2023.
Vineyard Wind 1 closed a $1.2 billion tax-equity financing with JPMorgan Chase, Bank of America, and Wells Fargo, representing the largest single asset tax-equity financing and the first for a commercial-scale offshore wind project. Counsel was Kirkland & Ellis.
The installed blade at Wind Turbine Generator (WTG) AW-38 failed and released debris into the environment. BSEE exercised regulatory authority and suspended further blade installation and power production. Root-cause analysis by GE Vernova and the installer determined the failure was due to a manufacturing deviation.