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Avangrid Announces Installation Completion of the First Offshore Substation in the U.S.

Avangrid Announces Installation Completion of the First Offshore Substation in the U.S.

Avangrid’s Vineyard Wind 1 offshore substation will collect power generated by 62 wind turbine generators, and will bring it to shore through two export cables powering 400,000 homes and businesses in Massachusetts

This substation is the largest ever installed by the Iberdrola’s global portfolio of offshore wind farms

Boston, MA — July 28, 2023 — Avangrid (NYSE: AGR), a leading sustainable energy company and part of the Iberdrola Group, announced today the successful installation of the offshore substation at its Vineyard Wind 1 project, the first large-scale offshore wind farm in the U.S., currently under construction off the coast of Massachusetts. 

An offshore substation is a critical component of an offshore wind farm, designed and built to collect and export the electricity generated by the wind turbine generators. It serves as an intermediary platform between the wind turbine generators in the offshore lease area and the onshore power grid. 

“Offshore wind in the U.S. is one step closer to becoming a reality”, said Pedro Azagra, Avangrid CEO. “Our team's dedication, expertise, and collaborative spirit have made this achievement possible and, by building pioneering projects like Avangrid’s Vineyard Wind 1, we remain committed to accelerating the energy transition to create a cleaner, more sustainable future in the Commonwealth of Massachusetts and in the U.S.”.

Including its two main components, the topside and the jacket, the offshore substation weighs over 5,000 tons, making it the first one ever installed in the U.S. and the sixth and largest in the Iberdrola Group’s global fleet to date. So far, Iberdrola has installed five other substations at its West of Duddon Sands (UK), Wikinger (Germany), East Anglia One (UK), St. Brieuc (France), and Baltic Eagle (Germany) offshore wind farms.

Vineyard Wind 1 is expected to deliver first power before the end of this year and, once completed, the facility will generate 806 MW of clean, renewable energy to power more than 400,000 homes and businesses in Massachusetts. 

About Avangrid

About Avangrid: Avangrid, Inc. (NYSE: AGR) aspires to be the leading sustainable energy company in the United States. Headquartered in Orange, CT with approximately $44 billion in assets and operations in 24 U.S. states, Avangrid has two primary lines of business: networks and renewables. Through its networks business, Avangrid owns and operates eight electric and natural gas utilities, serving more than 3.3 million customers in New York and New England. Through its renewables business, Avangrid owns and operates a portfolio of renewable energy generation facilities across the United States. Avangrid employs approximately 8,000 people and has been recognized by JUST Capital in 2021, 2022, 2023 and 2024 as one of the JUST 100 companies – a ranking of America’s best corporate citizens. In 2024, Avangrid ranked first among utilities and 12 overall. The company supports the U.N.’s Sustainable Development Goals and was named among the World’s Most Ethical Companies in 2024 for the sixth consecutive year by the Ethisphere Institute. Avangrid is a member of the group of companies controlled by Iberdrola, S.A. For more information, visit


About Iberdrola: Iberdrola is one of the world's biggest energy companies and a leader in renewables, spearheading the energy transition to a low carbon economy. The group supplies energy to almost 100 million people in dozens of countries. With a focus on renewable energy, smart networks and smart solutions for customers, Iberdrola’s main markets include Europe (Spain, the United Kingdom, Portugal, France, Germany, Italy and Greece), the United States, Brazil, Mexico and Australia. The company is also present in growth markets such as Japan, Taiwan, Ireland, Sweden and Poland, among others.

With a workforce of nearly 40,000 and assets in excess of €141.7 billion, across the world, Iberdrola helps to support 400,000 jobs across its supply chain, with annual procurement of €12.2 billion. A benchmark in the fight against climate change, Iberdrola has invested more than €130 billion over the past two decades to help build a sustainable energy model, based on sound environmental, social and governance (ESG) principles.

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