This section of the report discusses the architecture of testing/protocols/facilities that are needed to support energy storage from lab (readiness assessment of pre-market systems) to grid deployment (commissioning and performance testing). . The integrated PV + Energy Storage + Charging (PSC) system represents a highly flexible and intelligent energy architecture that combines solar photovoltaic generation, battery-based energy storage, and electric vehicle (EV) charging infrastructure into a unified platform. Did you know that 68% of utility-scale battery failures occur due to inadequate testing protocols? This article explores how rigorous testing ensures. . This report of the Energy Storage Partnership is prepared by the National Renewable Energy Laboratory (NREL) in collaboration with the World Bank Energy Sector Management Assistance Program (ESMAP), the Faraday Institute, and the Belgian Energy Research Alliance. Department of Energy (DOE). . This chapter describes these tests and how they are applied differently at the battery cell and integrated system levels. Introduction Battery energy storage systems (BESSs) are being installed in power systems around the world to improve efficiency, reliability, and resilience. The methods for data comparison analysis and performance evaluation on actual operation are restricted. . Evaluate energy yield, assess product safety and conduct R&D studies for solar and storage equipment at our iconic outdoor testbed. Assess different solar PV manufacturers, technologies, product types and shading scenarios.