Investment Rating - The report recommends a "Buy" rating for companies involved in the AIDC and related sectors, highlighting potential growth opportunities driven by advancements in AI and data center infrastructure [4]. Core Insights - The AIDC sector is experiencing rapid growth, with significant increases in power consumption and infrastructure upgrades driven by AI applications. The global AI market is projected to grow from $25.86 billion in 2024 to $803.9 billion by 2033, reflecting a compound annual growth rate (CAGR) of 46.5% [14][20]. - The power density of AI cabinets is expected to rise significantly, with single cabinet power reaching over 100 kW by 2025 and potentially exceeding 1 MW by 2030. This trend necessitates a shift towards high-voltage direct current (HVDC) systems for efficient power delivery [3][27]. - The evolution of power supply architecture is marked by a transition from traditional discrete components to highly integrated, modular designs. This includes vertical power delivery (VPD) systems that minimize power distribution network (PDN) losses and enhance efficiency [3][27]. - The report emphasizes the importance of companies like Hewei Electric, Zhongfu Circuit, and others that are positioned to benefit from these trends in high-density power integration and HVDC technology [3][4]. Summary by Sections Section 1: Growth in CSP Capital Expenditure and AIDC Power Demand - The North American and Asia-Pacific AI markets are rapidly expanding, leading to increased investment in AIDC infrastructure. The AIDC market in China is expected to exceed 100 billion CNY in 2024, reaching approximately 288.6 billion CNY by 2028, with a CAGR of around 30% [14][18]. Section 2: AI Cabinet Power Density and Electrical Architecture Upgrades - The report discusses the anticipated upgrade of AIDC electrical architecture to 800V HVDC systems, which can significantly enhance power transmission efficiency compared to traditional AC systems. This transition is driven by the increasing power demands of AI servers and the need for more efficient cooling solutions [3][27]. Section 3: Onboard Power Supply Architecture Upgrades - The report outlines the trends in onboard power supply systems moving towards high integration and modular designs. The shift from discrete components to integrated power modules is essential to meet the demands of high-performance AI chips, which are increasingly operating at lower voltages and higher currents [3][27]. Section 4: Investment Recommendations - The report suggests focusing on companies that are leading the charge in high-density power integration and HVDC technology, such as Hewei Electric and Zhongfu Circuit, as they are well-positioned to capitalize on the growing demand for advanced data center infrastructure [3][4].

Summary of Conference Call on Liquid Cooling Technology Industry Overview - 2025 is projected to be the global year of liquid cooling, with an expected shipment of 30,000 units, significantly higher than the 1,000-2,000 units in 2024 [1][3] - Demand is anticipated to increase by over 30% in the second half of 2025 compared to the first half, driven by IT infrastructure expansion and capacity ramp-up [2][4] Key Insights and Arguments - NVIDIA plans to deliver 5 million GPUs in 2026, corresponding to approximately 60,000 to 70,000 liquid cooling cabinets, indicating a potential doubling of demand [4][5] - The liquid cooling market is fragmented, with leading suppliers like Weidi holding a 30%-35% market share, and North American suppliers collectively accounting for nearly 60% of the market [1][7][8] - Chinese manufacturers face challenges in the international market due to trade issues and technological gaps, primarily participating in Southeast Asian markets while focusing on domestic liquid cooling applications [1][9] Pricing and Cost Structure - The cost of overseas liquid cooling systems is approximately $70,000 for an N172 cabinet and $50,000 for an N272 cabinet, while domestic systems are cheaper, averaging around 2,000 RMB per kW [10][11] - Domestic cooling systems are generally less expensive due to lower component costs and simpler designs, with total costs around 2,000 RMB per kW [12] Profitability and Market Entry - Overseas manufacturers typically require a gross margin of at least 35%, while some domestic companies are willing to operate with margins as low as 20% [13][14] - There are currently no clear indications that domestic companies can directly enter the overseas market, although some have received certifications from major clients like NVIDIA [15] Technological Developments - The liquid cooling technology is evolving, with potential shifts towards hybrid cooling solutions that combine GPU direct cooling with cabinet-level silent cooling [3][16] - The Rubin architecture may introduce new challenges for liquid cooling systems, necessitating further validation of new technologies [17][18] Future Trends - The development of server power supplies is moving towards higher capacities, with a new generation of 12 kW power supplies expected in early 2026 [19][20] - The transition to high-voltage direct current (DC) power supplies is anticipated, which could enhance energy density and efficiency [20] Challenges in Implementation - The low-voltage 848V systems face limitations due to high current requirements, necessitating the development of high-voltage to low-voltage onboard power supplies [23] - High-frequency conversion technologies present significant challenges in terms of design complexity and cost [24][25] Conclusion - The liquid cooling market is poised for significant growth, driven by technological advancements and increasing demand from the IT sector. However, challenges remain in terms of international market entry for Chinese manufacturers and the need for ongoing innovation in cooling technologies.