Recently, photovoltaic manufacturer SEG Solar officially commenced the construction of a 3GW ingot and wafer manufacturing facility in Batang, Central Java, Indonesia. This project serves as a core component of SEG Solar’s 5GW TOPCon vertically integrated manufacturing base in Indonesia, aimed at establishing a complete supply chain for the U.S. market free from “Foreign Entity of Concern (FEOC)” involvement.
It is reported that SEG Solar’s integrated project in Indonesia began construction in September 2024, with plans to cover the entire industry chain from ingots and wafers to cells and modules. In May this year, a 2GW photovoltaic cell manufacturing facility within the base became operational. The newly launched ingot and wafer facility is a crucial part of the project’s first phase, with a total investment of approximately $80 million, and is scheduled to officially commence production in the third quarter of 2026.
Jun Zhuge, Founder and CEO of PT SEG Solar Manufaktur, stated that the establishment of upstream ingot and wafer capacity is a key step in perfecting the company’s integrated manufacturing system. Through complementary manufacturing footprints in the U.S. and Indonesia, SEG Solar can supply the U.S. photovoltaic market with fully traceable, non-FEOC products that meet current and future compliance requirements.
To deepen its presence in the U.S. market, SEG Solar already operates a 2GW n-type module assembly facility in Houston, Texas. The facility began production in 2024 and commenced shipments of utility-scale photovoltaic modules in July 2025, forming an upstream-downstream synergy with the Indonesian manufacturing base.
