SEG Solar Fires Up First Line at Indonesian Mega Factory

• SEG Solar has activated the maiden production line at its $500-million, 5-GW photovoltaic industrial park in Central Java, fast-tracking plans to anchor Southeast Asia’s largest solar-equipment hub.

US module maker SEG Solar has moved from blueprints to output in less than a year, energising the first production line at its flagship photovoltaic (PV) complex in Indonesia’s Central Java Province. The milestone kicks off phase one of a $500-million project designed to deliver 5 GW of N-type solar cells annually and, ultimately, matching module capacity.

A full value chain under one roof
Located inside the Grand Batang City industrial zone, the 40-hectare park will span the entire PV supply chain—from polysilicon ingots and wafers to cells and finished panels—making it the largest vertically integrated solar facility in Southeast Asia once complete.

TOPCon tech at commercial scale
Phase one erects ten advanced TOPCon cell lines expected to reach nameplate capacity by the end of Q2 2025. The same stage will add 3 GW of module assembly, allowing SEG to ship finished panels well before final build-out. 

Feedstock for Texas—and tariff compliance
Cells from Batang will supply SEG’s 2-GW module plant in Houston, Texas, giving the company a traceable, non-Chinese supply chain that meets the United States’ strict import-tariff and forced-labour rules. “Integrated layout across the entire industry chain is crucial for SEG to deliver clean, verifiable products to our core markets,” founder and COO Jun Zhuge said earlier. 

Indonesian renewables push gets a boost
Jakarta has set a target of sourcing 23 % of its electricity from renewables by 2025. By localising module manufacturing, SEG’s park aligns with Indonesia’s ambitions to nurture a domestic solar ecosystem that can serve both home demand and export markets across Asia-Pacific.

Skilled jobs and regional supply resilience
Construction and early operations already support hundreds of skilled positions, with payroll expected to swell as additional lines come online. The expansion also diversifies global PV supply at a time when developers face price volatility and shipping bottlenecks.

SEG said integration of subsequent phases is on schedule, with management eyeing full 5-GW cell and module output before the decade’s end. For Jakarta’s policymakers and the wider solar industry, the first modules rolling off Batang’s line signal another step toward a more geographically balanced—and politically palatable—supply chain.