Initiated by IES, Monsoon Wind Power Project began in 2011 as an ambitious vision to harness the strong, consistent winds of southern Lao PDR and deliver clean energy across borders. Spanning roughly 68,000 hectares of mountainous terrain in the Dak Cheung District of Sekong Province and the Sanxay District of Attapeu Province, it is now Southeast Asia’s largest onshore wind farm, with an installed capacity of 600 MW. The project’s 133 turbines are supported by four 115 kV substations for power collection and a 500 kV substation for stepping up voltage before transmission. From there, electricity travels along a 27-kilometre high-voltage transmission line to the Lao–Vietnam border, and then continues another 44 kilometres through EVN’s 500 kV transmission system to reach the Thanh My substation. It operates under a 25-year Power Purchase Agreement with EVN and a 28-year Concession Agreement with the Government of Lao PDR. Representing an investment of approximately US$950 million, Monsoon Wind is financed by a consortium of leading international and regional lenders, reflecting deep confidence in its technical, environmental, and economic merits. More than a decade of wind measurement data guided the optimal placement of each turbine, ensuring maximum performance and efficiency. Beyond clean energy, the project has brought significant local benefits. Since construction began in March 2023, the Monsoon Wind Project has created at least 1,600 jobs, over 1,000 of which were filled by Lao nationals. These roles built valuable skills and livelihoods in the region.

An annual US$1.1 million Community Development Fund supports education, healthcare, agriculture, and infrastructure improvements in surrounding villages. Early initiatives include scholarships for local students to study abroad, mobile health checkups bringing doctors and nurses into remote villages in the project area, and coffee livelihood programs — such as distributing seedlings, providing training, and sharing techniques to improve harvests and household income.

Key infrastructure includes a 500 kV substation at the project site, four 115 kV substations, 250 hectares of permanent land use, and cross-border grid interconnection facilities. On 22 August 2025, the 600 MW Monsoon Wind Power Project successfully delivered electricity to EVN, marking a historic first for cross-border renewable energy in Asia. Over its 25-year operating life, it is expected to avoid more than 32.5 million tonnes of CO₂ emissions — equivalent to removing approximately 7 million cars from the road for a year, or planting about 59 million trees and allowing them to grow for 25 years.