Evaluating Performance of Large UPS Systems with AI Workloads

This white paper evaluates the performance of Vertiv's large uninterruptible power supply (UPS) systems, specifically the Liebert EXL S1, under various artificial intelligence (AI) workloads. The document outlines the test objectives and methodology, focusing on the UPS's ability to maintain stable output voltage and current during operations that involve rapid changes in power load. The analysis includes three scenarios: operation on utility power, transition from utility to generator, and operation under generator power. The results indicate that the UPS effectively manages fluctuations in input signals while maintaining compliance with IEC 62040-3 Class 1 voltage performance specifications. The paper details the UPS's performance metrics during multiple AI training cycles and emphasizes the system's capability to provide reliable power supply to AI applications. Additionally, it discusses the implications of AI power loads on electrical demand patterns in data centers and the UPS's design features that support effective load management.