China has completed a milestone trial of a megawatt-scale airborne wind power system, after a helium-supported platform successfully carried out its first test flight and delivered electricity into the local grid.
The demonstration took place in Yibin, Sichuan Province, where the floating wind system climbed to around 2,000 metres and generated 385 kWh during the trial. The prototype, known as the S2000 Stratosphere Airborne Wind Energy System (SAWES), is described as a world-first megawatt-class airborne wind system designed for use near urban areas.
The platform is lifted by a helium-filled aerostat and transmits electricity to the ground through a tethered cable, which also helps stabilize and control its position. Developers say the technology could serve two main purposes: providing energy in off-grid locations and supporting renewable generation by complementing ground-based wind farms.
Unlike conventional turbines, the system is built to harness stronger and more stable winds at higher altitudes. Its ducted design channels airflow through a structure equipped with 12 turbines, helping increase efficiency. The system’s maximum rated capacity is reported to reach up to 3 megawatts.
Small-batch production has reportedly begun, alongside plans to scale manufacturing of high-performance envelope materials. Output is expected to reach 200,000 linear metres per year by 2026, with further expansion planned by 2028. Analysts note that while the test marks a notable step for next-generation clean energy, long-term reliability, safety, and cost performance will still need to be proven before wider deployment.
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