Sungrow, a global giant in solar inverters and energy storage systems, has launched commercial solid-state transformers designed for artificial intelligence data centers. These transformers utilize an 800V DC architecture, which allows for a 50% reduction in power distribution footprint and achieves a peak efficiency of 98.5%.
Industry Interest and Data Center Challenges
The launch took place on July 9th, and the event attracted representatives from major technology companies, including Microsoft, AWS, Alibaba Cloud, Tencent, ByteDance, and Baidu, indicating broad industry interest. As AI computing clusters expand to gigawatt consumption levels, traditional power distribution schemes face three serious limitations.
Firstly, the floor area ratio between power equipment and IT equipment has changed from less than 1:1 to 10:1, significantly increasing infrastructure costs. Secondly, annual electricity bills for gigawatt-scale data centers can reach billions of yuan. Thirdly, commissioning time for hundreds of megawatts of facilities often exceeds one or two months, negatively impacting return on investment (ROI).
Advantages of Sungrow SST Technology
Traditional AC architectures, based on grid frequency transformers, uninterruptible power supplies (UPS), and multiple conversion stages, suffer from excessive copper losses, large dimensions, and complexity in coordinating equipment from different suppliers. The Sungrow SST approach replaces this with medium-voltage direct connection and high-frequency conversion, offering an 800V DC architecture. This architecture provides a peak efficiency of 98.5% and halves the required power distribution area. Power density reaches 312 kW per square meter, covering power from 1.5 MW to 4.5 MW per unit.
Market Prospects and Partnerships
2026 is expected to be the first year of SST commercialization. Competitors such as Delta Electronics, Wei Guang Energy, and Tgood have also introduced SST products. Analysts predict that the global SST market could reach 100 billion yuan by 2030. Sungrow's advantage lies in its complete ecosystem, which extends beyond the SST itself to include 800V DC power supplies, DC-DC converters for battery interfaces, and DC-AC inverters for AC loads, all operating on the same 800V architecture.
The company has signed strategic procurement agreements with Dongyunguang for 30 MW and with Zhonglian Data Group for 100 MW. Sungrow plans to begin small-batch testing and validation with North American hyperscalers in 2026, with bulk orders expected in 2027, and large-scale deployment scheduled for 2028, aligning with the expansion of next-generation AI chips. Manufacturing bases in China, Thailand, India, and Poland are ready for SST production, and models with UL certification, outdoor versions, and 35kV SST products are under development.