CGN Connects First Unit of High-Altitude Concentrated Solar Plant in Tibet

China General Nuclear Power Corp (CGN) has connected the first steam-turbine unit of a concentrated solar power (CSP) plant in Gar County, in Tibet’s remote Ali (Ngari) Prefecture, to the grid, according to Chinese state financial outlet Xinhua Finance and Science and Technology Daily. The 25 MW unit went live on November 6, with a second, identical 25 MW unit due to follow by the end of 2026, completing the plant’s 50 MW CSP capacity as part of a wider 150 MW solar demonstration project that also includes 100 MW of photovoltaic generation already operating at full capacity.

A demonstration project built for extreme altitude

The site sits at an average elevation of about 4,300 meters, and CGN describes it — a claim PV Magazine notes has not been independently verified — as the world’s highest-altitude operational, grid-connected CSP plant. Chinese reporting puts the total investment at roughly CNY 2.4 billion (about $330 million), though a separate account relayed by tech outlet IT Home cites CNY 2.78 billion; the discrepancy is unresolved in the available reporting. CGN says it adapted its proprietary distributed control system to cope with the site’s low air pressure and intense ultraviolet exposure, conditions that complicate both plant operation and long-term component durability.

Using daytime solar power to make heat, then electricity

Unlike a conventional photovoltaic farm, the CSP unit does not generate electricity directly. Electricity from the project’s PV arrays instead powers a molten-salt electric heater — rated at 205 MW and described by CGN as the largest such heater deployed in any CSP project worldwide, another claim PV Magazine flags as unverified — which stores thermal energy in molten salt for up to 14 hours. That stored heat drives the steam turbines after dark or during periods of low sunlight, while a lithium-ion battery system provides rapid frequency response to smooth output. The plant can also operate in an islanded mode, disconnected from the wider grid, which matters in a region where CGN says supply has historically depended on diesel generation and electricity transmitted over long distances.

District heating for a remote administrative center

Beyond electricity, the project functions as a combined heat and power facility, supplying winter district heating to Shiquanhe, the administrative seat of Ali Prefecture. That dual role reflects Beijing’s broader push to expand CSP capacity: China’s National Development and Reform Commission and National Energy Administration set a target in late 2025 of 15 GW of installed CSP capacity nationwide by 2030, up from a small base today. CGN already operates a 50 MW parabolic-trough CSP plant at Delingha, in neighboring Qinghai province, which logged 2,824 equivalent full-load hours in 2024 — the highest utilization of any CSP plant in China that year, according to the company.

The real test is still ahead

CGN projects that once fully built out, the Ali project will generate about 270 million kWh a year and cut carbon dioxide emissions by roughly 168,200 tonnes annually. Those figures, however, describe a design target rather than a demonstrated result: as PV Magazine notes, the performance of the integrated photovoltaic-heating, thermal-storage and cogeneration system has not yet been shown under sustained operation, particularly through a full Tibetan winter. The next several months — as the second turbine comes online and the plant faces its first cold season at scale — will show whether a 150 MW demonstration project on the Tibetan plateau can actually deliver the round-the-clock, weather-independent solar power that CSP technology promises on paper.

Related: World’s Largest Liquid-Air Energy Storage Plant Comes Online in China and China Hosts Half the World’s Clean Industrial Plants look at other pieces of China’s fast-moving clean energy build-out.

Sources

• PV Magazine, “CGN connects first unit of world’s highest-altitude CSP plant in Tibet,” November 9, 2026 — plant specifications, technology description, unverified claims flagged, performance caveats. pv-magazine.com
• Xinhua Finance and Science and Technology Daily (科技日报), reporting on the November 6, 2026 grid connection of the first CSP turbine at CGN’s Ali project — independent Chinese-language confirmation, investment figures, projected output. stdaily.com

Illustrative image. Photo: kallerna, CC BY-SA 4.0, via Wikimedia Commons — source