United Solar Completes 100,000-Ton Polysilicon Project in Oman – Largest Outside China

United Solar Holding has announced the full completion and successful full-process commissioning of its 100,000-ton high-purity silicon-based material project in the Suhar Free Trade Zone, Oman.

As the largest polysilicon production facility outside China and the first polysilicon project in the Middle East, the landmark development marks the first full overseas deployment of Chinese industrial standards in the global polysilicon sector.

Construction of the project kicked off in March 2024, with commercial operation achieved in February 2026, representing a total construction period of only about 23 months. The project involves a total investment of approximately US$1.6–1.8 billion. Once at full capacity, it will support the production of around 40GW of photovoltaic modules, meet the annual electricity demand of roughly 12 million households, and reduce greenhouse gas emissions by an estimated 8.8 million tons per year.

The project is backed by a diversified capital structure. Future Fund Oman (FFO), an affiliate of the Oman Investment Authority, serves as the largest shareholder with a total investment of about US$260 million. Meanwhile, the International Finance Corporation (IFC), a member of the World Bank Group, has arranged US$480 million in debt financing together with a consortium of regional banks.

Headquartered in the Suhar Free Trade Zone, Sultanate of Oman, United Solar Polysilicon Co., Ltd. was founded in May 2023. The company specializes in manufacturing high-purity crystalline silicon materials for photovoltaic and semiconductor applications. Its founder, Zhang Longgen (Chinese-American), previously held senior management positions at Jinko Energy and Daqo Energy. Shareholders include prominent investment institutions such as Yida Capital and IDG Capital.

Notably, the project is operated by United Solar Polysilicon (USP), a subsidiary of United Solar Holding. To realize green production, USP is partnering with OQ Alternative Energy to develop a 700MW photovoltaic power station, which will supply renewable electricity to the polysilicon plant. According to OPIS, USP has also reserved 400 acres of land adjacent to the facility for potential future expansion, including 6.6GW of silicon wafer capacity and 3GW of solar cell capacity.

The company stressed that, as a manufacturing base located outside China, its products offer full supply chain traceability and fully comply with the U.S. Foreign Entity of Concern (FEOC) requirements. This will allow downstream users of its polysilicon to smoothly access the U.S. market. Waaree Solar Americas, the U.S. subsidiary of India's Waaree Energies, has invested in USP to secure non‑Chinese‑origin polysilicon supplies for its U.S. manufacturing facilities.