Accelerating net zero through innovative energy service models: a BESS-as-a-service case study with real-time grid simulation

This paper presents a case study of an industrial facility that implemented a Battery Energy Storage System (BESS) through a service-based model, achieving improved power quality and operational continuity without upfront investment—highlighting the role of innovative business models in advancing net-zero goals. The system model, built from empirical data and a generic drive model due to missing manufacturer specs, accurately replicated field responses and enabled energy estimation under voltage sags. To support further analysis and mitigation design, Hardware-in-the-Loop (HIL) simulation is proposed as a real-time validation platform integrating the model with physical hardware. Using HIL simulations, the system was validated to withstand deep voltage sags, one of the main causes of motor drive disconnection in high-load processes. Voltage sag mitigation strategies, provide the technical foundation for understanding system behaviour under faults. The BESS-as-a-Service model allowed rapid implementation, operational flexibility, and clear cost-benefit alignment for the end user. By combining technical robustness with contractual innovation, the project showcases how energy-as-a-service can accelerate decarbonisation in complex industrial settings. Though tailored to a specific setup, the findings offer valuable insights into current mitigation strategies and highlight enhancements to boost resilience during severe voltage sags.