SDG&E claims world’s largest lithium-ion battery energy storage facility at 30-MWs, 120-MWhs

Written By: Stratton Report
February 24, 2017


On February 24, SDG&E announced that the utility was using what it termed the world’s largest lithium-ion battery energy storage facility.  According to SDG&E, the 30-MW energy storage facility is capable of storing up to 120-MWhs of energy; the facility combines 400,000 batteries, similar to those in electric vehicles, were installed in nearly 20,000 modules and placed in 24 containers. 

The utility stressed that the facility was mandated in 2016 by the CPUC, which directed Southern California investor-owned electric utilities to fast-track additional energy storage options to enhance regional energy reliability.  SDG&E noted that it had expedited ongoing negotiations and contracted with AES Energy Storage to build two projects for a total of 37.5-MW of lithium ion battery energy storage. In addition to the 30-MW facility built in Escondido, Calif., a smaller 7.5-MW installation was built in El Cajon.

Scott Drury, SDG&E’s president remarked:

San Diego County is a community of leadership and innovation, so it is only fitting that this community should receive the benefit of this unique project. For more than a decade, SDG&E has been at the forefront to deliver results consistent with state and local clean energy and carbon emission goals.  These projects affirm our commitment to deliver clean energy to customers and to provide a more reliable power supply to our electric grid when it is most needed.

John Zahurancik, AES Energy Storage president noted: “SDG&E is a leader in providing clean, reliable power to their customers, and we’re honored that they chose Advancion energy storage to serve their needs. These two projects, including the world’s largest advanced energy storage site, are the latest proof of energy storage’s capacity to scale up and solve our most pressing grid issues in a short period.”

By 2030, SDG&E expects to develop or interconnect more than 330-MWs of energy storage on the system.