As offshore wind turbines grow larger, the utilization rate of domestic supply chains drops by more than 15 percentage points. Government data has confirmed for the first time a "trilemma" in which using larger turbines to accelerate deployment and lower unit costs reduces the domestic content share.
According to materials received by Democratic Party lawmaker Lee Yong-woo's office from MCEE (Ministry of Climate, Energy and Environment) on October 21, 2026, among offshore wind projects that were awarded contracts in the first half of 2026, domestic supply chain utilization stood at 87 percent for 10-megawatt turbine projects and 71 to 72 percent for 15-megawatt turbine projects. The 10-megawatt projects are Gulup-do (250 megawatts) and Geumo-do (160 megawatts), which use Doosan Enerbility turbines. The 15-megawatt projects are Haesong 3 (504 megawatts), Hanbit (340 megawatts), and Haewoori 2 (532 megawatts). Domestic supply chain utilization is measured as the share of domestically procured equipment and services in total project costs.
