As AI data center capacity and GPU power consumption grow exponentially, Sungrow emphasizes the need to replace traditional AC UPS systems with an 800V DC architecture. The company highlights solid-state transformers as a key driver for this system-level power supply revolution.
Overview: The Paradigm Shift in AI Data Center Power
As artificial intelligence data center capacity and GPU power consumption grow exponentially, the traditional "transformer plus AC UPS and multi-stage distribution" system is facing a critical reconstruction window. Industry leaders like Sungrow emphasize the urgent need to replace legacy alternating current architectures with an 800V direct current (DC) framework. At the heart of this system-level power supply revolution is the Solid-State Transformer (SST), a technology poised to redefine energy distribution for high-density computing environments.
Technical Details: Silicon Carbide and the 800V DC Architecture
Unlike traditional transformers relying on low-frequency iron cores and copper windings, SSTs utilize third-generation semiconductors like Silicon Carbide (SiC) for high-frequency power conversion. This "silicon advancing, copper retreating" paradigm reduces volume by 40% to 60% and cuts copper and cable usage by up to 80%. While conventional transformers operate at 85% to 95% efficiency, SSTs can achieve peak efficiencies of up to 98.5%. Furthermore, SSTs function as intelligent "energy routers," offering multi-port AC/DC compatibility, precise green power tracing, and targeted power allocation. The core technical barriers remain medium-voltage cascading technology, high-frequency transformer design, and stringent medium-voltage insulation requirements.
Industry Impact: Major Players Accelerate R&D and Deployment
A fierce industrial race has emerged among power electronics and transmission equipment manufacturers. CSG Smart Science & Technology recently established a joint research institute for computing-power and grid synergy, unveiling an SST supporting bidirectional interconnection between 10kV AC and 800V DC. Sungrow, with a decade of R&D, introduced the EnerNeo SST featuring a flexible 1.5MW to 4.5MW combination and a 6+3 redundant architecture. China XD Inc. has successfully deployed its 10kV/2.42MVA/800V SST in the Guian National "East Data and West Computing" project and is leading the formulation of industry standards. Other major players, including Sifang with its multi-port energy routers adapting 10kV-35kV AC to 240V-800V DC, TBEA, Envision, and Xianeng, are also accelerating prototype testing and pilot deliveries.
Market Context: The 2026 Industrialization Dawn
Despite the technological momentum, the market remains in a cautious demonstration phase. Industry experts note that 2026 marks the dawn of SST industrialization, with 2026 to 2027 serving as the primary pilot period. Currently, telecom operators and internet giants predominantly rely on mature "Panama power" solutions. Nationwide SST pilots number merely around a dozen, as large-scale data centers remain hesitant due to the high failure risks associated with multi-stage cascading designs. True first-stage cascading SST manufacturers are scarce, making system integration, grid-connection debugging, and fault handling significant competitive moats.
Implications for AI Data Centers: System-Level Power Revolution
The transition to 800V DC architecture is widely recognized as the ultimate solution for future AI data centers. Nvidia’s whitepaper explicitly positions SSTs as the final target in the power evolution roadmap, transitioning from traditional AC UPS to 800V HVDC, then Panama power, and ultimately SSTs. By eliminating low-voltage distribution cabinets and multi-stage rectification, the 800V SST framework boosts overall system efficiency by 3% to 5%, significantly lowering Power Usage Effectiveness (PUE) and cooling energy consumption. This architectural shift is foundational for supporting the escalating power density of GPU clusters and paves the way for subsequent chip-level low-voltage power delivery down to 0.8V-1.2V.
Future Outlook: Roadmap to Mass Commercialization
The commercialization trajectory for SSTs is clearly mapped out. Sungrow anticipates establishing pilot projects in 2026, followed by small-scale deliveries in 2027, and mass commercialization between 2028 and 2030, alongside batch orders for overseas 800V DC data centers expected to materialize around the same time. The ultimate market expansion will depend on the co-evolution of technology routes, scenario standards, and cost curves. For enterprises, the competition transcends mere hardware parameters; it hinges on mature grid-access capabilities, reliable power device control, and the ability to deliver comprehensive source-grid-load-storage solutions at scale.