The Gateway Energy Storage project recently launched in San Diego County, California, has been crowned as the largest battery energy storage system in the world. Built and operated by grid infrastructure developer LS Power, the project is designed to improve grid stability and reliability while reducing energy costs for consumers.

After connecting the first phase of the project to the grid, which serves about 80% of California along with a The project is designed to improve grid stability and reliability while reducing energy costs for consumers. Source: LS PowerThe project is designed to improve grid stability and reliability while reducing energy costs for consumers. Source: LS Powersmall portion of Nevada, available storage capacity sat at just over 216 MW of energy in July 2020. Battery capability has since been increased, enabling the Gateway system to charge or discharge 230 MW for one hour. This capacity is expected to increase to 250 MW, superseding the Tesla-operated Hornsdale Power Reserve in South Australia, capable of storing 150 MW/193.5 MWh, as the previous record holder.

The system uses lithium-ion batteries from NEC Energy Solutions and includes 98 SMA inverters in a 70,000 ft2 facility. As part of a 15-year contract with Pacific Gas & Electric, LS Power will deliver 50 MW/200 MWh starting October 1, 2021. The company also pledged 100 MW/400 MWh from Gateway to Southern California Edison, effective August 1, 2021.

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