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Longi and Pertamina launch 1.6 GW solar plant in Indonesia

Chinese manufacturer Longi will invest alongside Pertamina NRE in a 1.6 GW site at Deltamas, aiming to strengthen the local photovoltaic chain and capture demand expected under Indonesia’s power plan.

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Longi Green Energy Technology Co. Ltd. (Longi) announced on 24 June the construction of a solar module plant in Deltamas, West Java, in partnership with Pertamina New & Renewable Energy (Pertamina NRE). The facility will feature an annual capacity of 1.6 GW using Hybrid Passivated Back Contact 2.0 (HPBC 2.0) technology. Teams will begin preparatory work by the end of June 2025 to respond quickly to regional demand. The investment marks Longi’s first major industrial foothold in Southeast Asia.

Industrial partnership
Pertamina NRE, the renewable subsidiary of state-owned oil firm Pertamina, contributes knowledge of the Indonesian market and regulatory procedures. The partners target a higher Domestic Component Level, or Tingkat Komponen Dalam Negeri (TKDN), in line with Jakarta’s tightening requirements. Expanded domestic production is intended to cut dependence on imports, currently dominated by Chinese suppliers. Modules manufactured in Deltamas could also be exported to neighbouring markets where premium demand is accelerating.

Indonesia’s Rencana Usaha Penyediaan Tenaga Listrik 2025-2034 (RUPTL) sets a target of 17.1 GW of new photovoltaic installations over ten years. This timetable offers an immediate outlet for the 1.6 GW capacity planned at Deltamas. Longi expects a gradual ramp-up to match the release of that demand. Analysts estimate the plant could supply about ten % of the programme’s cumulative needs.

Technological and economic impact
The HPBC 2.0 platform combines passivated back contact and high-efficiency cells, delivering a conversion rate above 24 % according to internal data. The site will integrate wafer machining, cell assembly and lamination, thereby trimming logistics costs. Covering roughly twenty-five hectares, the complex is expected to train nearly eight hundred technicians. Executives have not disclosed the investment amount, stating only that part of the equipment will come from amortised plants in China.

“Indonesia holds immense potential in renewable energy, and Longi is proud to contribute our world-leading solar technology to this transformative journey,” said Dennis She, vice-president of Longi. He added that local production would help drive down costs and create high-value jobs. Pertamina NRE foresees commercial start-up before the end of next year, subject to final environmental permits. The construction pace will indicate whether Indonesia’s photovoltaic supply chain can keep up with the ambitious roadmap set by the RUPTL.

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