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Project Description Griffith Energy Storage Project 3. Assist California utilities in meeting their obligations under the CPUC's Energy Storage Framework and Design Program. 4. Provide for the economically viable, commercial financeable, and environmentally beneficial use of the site's limited agricultural capacity. 5. Develop a site in proximity to transmission infrastructure in order to minimize environmental impacts. 6. Develop a battery energy storage facility in San Joaquin County, which would support the economy by investing in the local community, creating local construction jobs, and increasing tax and fee revenue to the County. PROJECT CHARACTERISTICS The Project would contain pad-mounted energy storage units, in addition to inverters, supervisory control and data acquisition (SCADA)equipment, a collector substation, and an interconnection gen-tie line to the Tesla Substation. The Project would also include related and supporting facilities such as on-site service roads, gates and security fencing, and temporary laydown and construction areas. Construction is expected to begin as early as 2023 and be completed in approximately 12 months. Energy Storage System Batteries Individual lithium-ion, or similar technology, battery cells form the core of the energy storage system. The battery cells are assembled either in series or parallel connection in sealed battery modules. The battery modules would be installed in self-supporting racks electrically connected either in a series or parallel to each other. The individual battery racks are connected in series or parallel configuration to deliver the energy storage system power rating.At this time, the battery technology for the Project has not yet been finalized; the battery type would be selected based on the technology available at the time of construction. Enclosure Units and Controller Multiple self-contained storage system enclosures would house the batteries, described above, as well as the battery storage system controller(Figure 4). The energy storage system controller is a multi-level control system designed to provide a hierarchical system of controls for the battery modules, power conversion system (PCS), medium voltage system, and up to the point of connection with the electrical grid. The controllers ensure that the energy storage system effectively responds to grid emergency conditions and provides a secondary safety system designed to safely shut down the facility. The storage system enclosure would also house required heating, ventilation, and air conditioning (HVAC) and fire protection systems. Heating, Ventilation, and Air Conditioning Units Each enclosure would be equipped with HVAC systems for thermal management of the batteries. The power for the HVAC system would be provided through a connection to the on-site station service transformer with connection lines installed above and/or below ground. Fire Suppression Systems Fire detection measures would be incorporated in the Project design in accordance with National Fire Protection Association safety standards. Power Conversion System The PCS consists of an inverter, protection equipment, direct current(DC) and alternating current(AC) circuit breakers, filter equipment, equipment terminals, and connection cabling system. Electric energy is June 2022 2 Griffith Energy Storage, LLC