Mainstream opened its office in Hanoi in Q2, 2017 and a second development office in Ho Chi Minh City to support in the development of the 800MW nearshore project in Soc Trang in November 2018.  The project is being co-developed by Mainstream and the Phu Cuong Group.  The Phu Cuong project will be the largest wind project in Vietnam and will be delivered in three phases.  Phase 1, 170MW will reach financial close in 2019.

In August 2018, it signed a MoU with the Department of Foreign Affairs to develop and roll out a capacity building programme in the Soc Trang province.

Mainstream is exploring further opportunities in Vietnam.