Offshore Wind

The Mainstream team has a legacy in offshore projects since the delivery into operation of Ireland's first offshore wind farm in 2004 as Airtricity. Members of the team sit on the Boards of RenewableUK, GWEC, Business Network for Offshore Wind (USA), Floating Centre for Offshore Wind (Co-Chair, ORE Catapult), and Offshore Wind California (Chair-OWC). 

Mainstream participates on working groups in Wind Energy Ireland, Scottish Renewables and Business Network for Offshore Wind (BNOW, USA).

Mainstream is the most successful independent developer of offshore wind at scale globally. It has developed and consented Hornsea One and developed Hornsea Two totalling 2.6 GW in England and consented the Neart na Gaoithe offshore wind project in Scotland, 450 MW. These projects represent approximately 20% of the UK’s offshore wind capacity either in operation or under construction.

Mainstream and local partner, Phu Cuong Group, isdeveloping the 1.4 GW Phu Cuong Soc Trang offshore wind farm in Vietnam. When fully built, it will be one of the largest offshore wind farms in SE Asia. It is being developed in two phases, Phase 1 (A and B – 200 MW each). Phase 1 (A) has received its Investment Registration Certificate in November 2021.  The project continues through the development cycle, with geo-technical investigations, grid studies completed and a site survey licence received for the full project capacity, 1.4 GW.

Community engagement and consultation work is also ongoing in local communities.

Mainstream continues to extend its offshore wind development credentials.  In addition to its Phu Cuong Soc Trang flagship offshore wind project, in 2020, Mainstream announced agreement to co-develop 500 MW offshore in the Ben Tre province, Vietnam with local company, AIT Corp.  Mainstream is actively pursuing further opportunties in Ireland, the Philippines and South Korea.

In the US, Mainstream has received full qualification to participate in several of the upcoming BOEM lease auctions.

Mainstream and Aker Offshore Wind have together been selected as the preferred bidder to acquire an initial 50% stake in Progression Energy's 800 MW floating offshore wind project in Japan. 

As a consortium, the three companies bring together unique capabilities and experience through Aker Offshore Wind’s offshore and floating expertise, Mainstream’s global leadership position in offshore wind development and Progression Energy’s global floating offshore wind development experience and strong position in Japan. Read more here.

Mainstream's Offshore Centre of Excellence (CoE) is located in Edinburgh, Scotland.  The CoE team supports Mainstream's international teams to drive the company's global offshore wind expansion, implementing best practice in offshore site selection and development.

Mainstream and Siemens announced the revival of its supply chain led partnership to bid in the ScotWind offshore leasing round.  The partnership with world-leading technology suppliers Siemens Gamesa Renewable Energy and Siemens Energy will work with Mainstream and Siemens Financial Services from the outset as Tier One suppliers. 

Combined, the group will create a dedicated multimillion pound fund to support its joint commitment of developing a competitive local supply chain to underpin the project’s development.  The consortium has already achieved great success previously in developing a sustainable offshore wind supply chain in Hull and Humber, following its development of the Hornsea zone.