In this guide, we will explore the complete lifecycle of energy storage system commissioning—from careful planning to post-commissioning review. . The commissioning process ensures that energy storage systems (ESSs) and subsystems have been properly designed, installed, and tested prior to safe operation. Field experiences, lessons learned, and recent codes and standards. . Clean Energy States Alliance (CESA) is a non-profit organization providing a forum for states to work together to implement effective clean energy policies & programs. ESTAP is conducted under contract with Sandia National Laboratories, with funding from US DOE.