BEIJING, September 21, 2026 - JA Solar, one of the world's largest photovoltaic manufacturers, has confirmed that its independently developed P-type heterojunction (P-HJT) solar modules successfully reached orbit aboard a Kuaizhou-11 rocket launched from the Jiuquan Satellite Launch Center on September 17. The mission marks the company's first in-orbit validation of P-HJT technology and represents a significant step toward commercializing crystalline silicon solar cells for space applications.
A Strategic Bet on Low-Earth Orbit
The introduction of this project comes during the global increase in satellite deployment, which has been promoted due to various purposes, including satellite internet, remote sensing and computing via satellites. JA Solar's CTO Dr. Ouyang Zil indicates the launch is a timely reaction to this trend: "As the speed of satellite installation is growing and the space economy is expanding, the role of solar energy in the future space sector will be more prominent than before," said the expert. "That's why it is important to create more cost-effective solar technologies for space."
The reasoning here is simple. For many years, solar arrays for space applications have made use of gallium arsenide III-V cells which have exceptional tolerance to radiation and efficiency, but are very expensive. Data from the industry suggests that GaAs bare cells cost around 300 RMB per watt while the full solar wings cost more than 500 RMB per watt, equivalent to around 100,000 RMB per square meter. This cost system is considered to be over-design in the case of low earth orbit satellites, considering their short life of operation.
JA Solar's P-HJT approach aims to change that calculus. The technology combines the manufacturability and cost advantages of crystalline silicon with a heterojunction structure that enhances radiation resistance. According to the company, the P-HJT modules launched into orbit are capable of mass production, offer cost competitiveness, and feature ultra-thin, flexible characteristics that make them compatible with rollable solar wing designs. This flexibility allows for higher packing efficiency within satellite bodies and reduces launch mass.
In-Orbit Validation Under Extreme Conditions
The instruments will now experience the most severe test conditions possible: the radiation belt found in low-Earth orbit. They will be subjected to strong radiation, high-energy particles, and extreme temperature changes-factors that lead to rapid deterioration in traditional silicon cells. To gauge how reliable and durable the P-HJT technology is in this environment, JA Solar will contrast the data collected during flight with results from laboratory testing.
Before launch, the modules underwent a comprehensive ground validation program conducted by third-party certification body Jianheng Certification, including high-low temperature cycling tests, ultraviolet irradiation, thermal vacuum cycling, vibration testing, and high-energy particle irradiation. The in-orbit data will determine whether those ground-based predictions hold true under real space conditions.
If the validation targets are met, the program could accelerate the adoption of mature crystalline silicon technologies as an alternative to gallium arsenide in low-Earth orbit applications, potentially lowering the cost of satellite power systems. JA Solar explicitly identified satellite internet, remote sensing, space communications, and space-based computing as potential beneficiary sectors.
JA Solar's space ambitions extend beyond this single launch. The company has formed a Space Energy Technology Ecosystem Alliance with industry and research partners, and has signed a strategic cooperation agreement with Jianheng Certification covering pre-launch reliability testing, in-orbit power generation verification, and post-mission recovery and failure analysis. The company has also been developing a space PV module concept based on 60 μm ultra-thin crystalline silicon and perovskite tandem technologies, with cell efficiency exceeding 30% for commercial-sized G12H cells and a power-to-weight ratio above 2 W/g.
Despite the strategic significance of the mission, JA Solar has been measured in its public communications. The company notes that space PV remains at an early stage of exploration and validation, and that large-scale commercialization remains highly uncertain. It currently has no orders related to space PV, and the program has no material impact on its current operating performance.
The in-orbit test is nonetheless a milestone for the broader Chinese PV industry, which has increasingly looked to space as a new frontier for crystalline silicon technology. As Dr. Ouyang Zi put it, "The technology will require long-term validation, but we believe it is a direction worth pursuing". For an industry accustomed to terrestrial cost curves and grid parity, the ultimate frontier may now be measured in orbits, not acres.
