As electricity prices become more volatile, electricity demand rises, and renewable energy becomes increasingly widespread, commercial battery energy storage systems (C&I BESS) are emerging as a critical tool for businesses to reduce costs, improve efficiency, ensure reliable power supply, and advance green transformation. This article will provide a comprehensive analysis of the core architecture, operational mechanisms, application advantages, and typical use cases of commercial energy storage systems, showcasing how GSL ENERGY leverages safe, intelligent, and efficient energy storage solutions to help businesses achieve a more controllable and sustainable energy future.