Mitsubishi Power Emerald Storage order

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San Diego Gas & Electric Company (SDG&E) has awarded Mitsubishi Power an order for a 10 megawatt (MW) / 60 megawatt-hour (MWh) energy storage solution for its Pala-Gomez Creek Energy Storage Project in Pala, California. The battery energy storage system (BESS) will add capacity to help meet energy demand, support grid reliability and operational flexibility, maximize use of renewable energy, and help prevent outages during peak demand. The BESS project is Mitsubishi Power’s eighth in California, bringing total capacity to 280 MW / 1,140 MWh of storage. For SDG&E, it includes turnkey design, engineering, procurement, and construction, as well as a 10-year long-term service agreement. It is scheduled to be online in early 2023.

The project will repower an existing energy storage site. It will employ Mitsubishi Power’s Emerald Integrated Plant Controller, which is an Energy Management System (EMS) and Supervisory Control and Data Acquisition (SCADA) system with real-time BESS operation and a monitoring/supervisory control platform. The Emerald Integrated Plant Controller complies with North American Electric Reliability Corporation critical infrastructure protection (NERC CIP) standards and meets the highest security certification in the energy storage industry (IEC/ISA 62443, NIST 800-53) for protection from cybersecurity risks and vulnerabilities.

For added physical safety, Mitsubishi Power’s solution employs lithium iron phosphate (LFP) battery chemistry. Compared with other chemistries, LFP provides longer life and superior thermal stability and chemical stability, while meeting UL 9540 and UL 9540A safety standards.


Fernando Valero, Director, Advanced Clean Technology, SDG&E, said, “SDG&E is committed to achieving net-zero greenhouse gas emissions by 2045. We are increasing our portfolio of energy storage assets to reach this goal. These assets enhance grid reliability and operational flexibility while maximizing our use of abundant renewable energy sources in California.”