November 15, 2019: The California Public Utilities Commission has rubber stamped plans for 567MW/2GWh of lithium ion energy storage to be installed in the state, including the world’s biggest system, the organization announced on November 8.
The CPUC approved plans by investor owned utility Pacific Gas and Electric, which has power purchase agreements with mNOC, Dynegy, and Hummingbird Energy Storage, as well as an engineering, procurement and construction agreement with Tesla.
The biggest proposed project is the 300MW/1.2GWh system by Dynegy (which merged with Vistra Energy in April) that will replace its gas-fired power plant in Moss Landing, California. It is due to be completed by January 2020.
Meranda Cohn, director of media relations at Vistra Energy, told ESJ: “The size was determined based on a number of factors; we considered the size of the existing turbine building at our Moss Landing Power Plant along with the size of the overall request for offers.
“We analyzed how to optimize the existing interconnection. We also considered what size made the most economic sense.
“Size is not a technical issue, it is an economic issue. It doesn’t make economic sense to put more stored power in an area than an area can actually use.”
The other projects are: Tesla (182.5MW/730MWh), to be completed by December 2020; Humingbird ES (75MW/300MWh), to be completed by January 2020; and mNOC AERS (10MW/40MWh), to be completed by January 2019.