Soochow: The space computing center has disruptive advantages, HJT may be the optimal solution for energy systems.

Research report released by Soochow shows that, driven by the global AI big models, the power gap in data center electricity is becoming increasingly prominent. This has led to the emergence of a new form of "space computing power" by deploying high-performance satellites in low/medium orbits. Silicon-based HJT solar cells, with advantages such as low-temperature processing, flexibility, and weight reduction, are best suited for the new generation of roll-up photovoltaic systems. Overseas manufacturers such as NexWafe and Solestial have accelerated their layouts. The report highlights Suzhou Maxwell Technologies (300751.SZ), a leading HJT equipment manufacturer with an overseas customer base, as well as Qingdao Gaoce Technology (688556.SH), capable of mass-producing 60m ultra-thin silicon wafers. Space Computing Power: Imbalance between supply and demand in the AI era drives the new paradigm of "orbital data centers" Driven by the global AI big models, the power gap in data center electricity is becoming increasingly prominent, leading to the emergence of a new form of "space computing power" by deploying high-performance satellites in low/medium orbits. Compared to traditional ground data centers, space computing power has revolutionary advantages such as high deployment efficiency, energy efficiency, and low cooling costs. For example, the "Three-Body Computational Constellation" launched by "Zhejiang Laboratory + National Star Aerospace" has already deployed 12 satellites, with a long-term plan for a 1000POPS computing power scale. Overseas startups such as SpaceX, Google, and NVIDIA-backed Starcloud are accelerating the construction of a space computing power cluster with a capacity of hundreds of GW. Energy system weight determines overall cost of satellites, flexible batteries key to development of roll-up solar arrays The energy system of space computing power systems accounts for up to 22% of the total cost, determining the overall economics of the satellites. Roll-up structures, with their lightweight and high power-to-mass ratio, are gradually replacing traditional Z-type structures, becoming the mainstream solution for LEO orbits; however, roll-up arrays are only compatible with flexible, thin-film batteries. Silicon-based HJT solar cells, with advantages such as low-temperature processing, flexibility, and weight reduction, are the most suitable for the new generation of roll-up photovoltaic systems, with overseas companies like NexWafe and Solestial accelerating their layouts. Additionally, HJT is also the optimal base cell for perovskite layering, with long-term development potential. Limited orbital resources prompt computing platforms to evolve towards large motherships and multi-star clusters Currently, the mainstream orbits are mainly LEO and SSO, with SSO providing stable sunlight throughout the year, making it the optimal choice for high-power data centers. There are about 9617 remaining available slots in the orbit, making resources scarce. To address the shortage of orbits, space computing power platforms are evolving along two paths to achieve large-scale deployment of hundreds of GW: 1) Large-scale: companies like Starcloud are constructing 4km x 4km photovoltaic mothership platforms, centralizing the deployment of computing power modules; 2) Cluster-based: companies like Google's Suncatcher plan to deploy clusters of 81-324 stars, increasing the unit orbit computing power density. According to estimates, 10GW photovoltaic capacity can correspond to 448 Google Suncatcher star clusters or 2 Starcloud motherships.