US utility Pacific Gas and Electric Company has requested approval of four lithium ion energy storage projects totalling around 567MW in a filing to the California Public Utilities Commission, the firm announced on June 29.
PG&E has selected one utility-owned project and three, third-party owned projects to be built in the Bay area following a request for offers on February 28.
The utilities commission agreed to the procurement process on January 12 in a bid to address two local sub-area capacity deficiencies and to manage voltage issues in another sub-area.
All of the projects will offer four-hour duration capabilities with only a 10MW aggregated system by Micronoc not being connected to the transmission point.
The mNOC AERS Energy Storage project will be a behind the retail meter application, with batteries placed at customer sites and interconnected to substations in the area.
The largest of the transmission-connected proposed projects is by Texas-based power distribution company Dynegy Marketing and Trade. The 300MW stand-alone BESS is due to be installed in Moss Landing.
Tesla is set to build its biggest system to date after PG&E selected its proposal for an 182.5MW ESS. The utility-owned project will be located within PG&E’s Moss Landing substation.
The system will address local capacity requirements and participate in the California Independent System Operator markets, providing energy and ancillary services.
The fourth is Hummingbird Energy Storage. The 75MW BESS will be located near the city of Morgan Hill, at the southern tip of Silicon Valley, California.
Roy Kuga, vice president, grid integration and innovation, PG&E, said: “Energy storage plays an increasingly important role in California’s clean energy future, and while it has been a part of our power mix for decades recent decreases in battery prices are enabling energy storage to become a competitive alternative to traditional solutions.
“As a result, we believe that battery energy storage will be even more significant in enhancing overall grid reliability, integrating renewables, and helping customers save energy and money.”
If approved by the CPUC, the first project is to come on-line by the end of next year, with the others due to be commissioned by the end of 2020.