US solar manufacturer SEG Solar has completed construction of a 3 GW rod and wafer factory in Indonesia.
The facility will be located in Batang regency on the north coast of Central Java province in Indonesia. The project covers an area of approximately 50,000 m² and is expected to start production in the third quarter of 2026. SEG also plans to implement a second phase of the project, bringing billet and wafer production capacity to 5 GW.
SEG will fully finance the approximately $80 million required for the project. The company says the investment is an important step in its strategy to build a fully integrated, non-Foreign Entity of Concern (FEOC) supply chain that supports the U.S. solar market.
With a solar module facility in the US and solar cell production facility in Batang, which is already in operation, SEG adds that the billet and wafer factory also establishes an end-to-end production chain for the company.
The company first signed an 80-year lease in Indonesia to develop an integrated industrial solar park in Batang June 2023. The solar cell factory was put into use in May 2025just seven months after construction started, with production of the company’s n-type cells.
“With complementary manufacturing capabilities in the United States and Indonesia, SEG is positioned to deliver a fully traceable and non-FEOC supply chain that meets the current and future demands of the U.S. solar industry,” said Jun Zhuge, Founder and Chief Executive Officer of PT SEG Solar Manufaktur.
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