Vistra brings world's largest utility-scale battery energy storage system online

The US power company Vistra Energy Corp. has connected its »Moss Landing Energy Storage Facility« to the power grid and started operation. At 300 MW / 1,200 MWh, the lithium-ion battery storage system, located on-site at Vistra's »Moss Landing Power Plant« in Monterey County, California, will be the largest of its kind in the world. Furthermore, construction is already underway on Phase II, which will add an additional 100 MW/400 MWh to the facility by August 2021, bringing its total capacity to 400 MW/1,600 MWh.
»A battery system of this size and scale has never been built before,« said Curt Morgan, chief executive officer of Vistra. Housed inside the power plant's completely refurbished former turbine building and spanning the length of nearly three football fields, Phase I of the battery system can power approximately 225,000 homes during peak electricity pricing periods.
The system is made up of more than 4,500 stacked battery racks or cabinets, each containing 22 individual battery modules, which capture excess electricity from the grid, largely during high solar-output hours, and can release the power when energy demand is at its highest and solar electricity is declining, usually early morning and late afternoon. Phases I and II of the facility are backed up by long-term contracts with Pacific Gas and Electric Company (PG&E).
Vistra's Moss Landing site provides an opportunity for extensive future expansion of the battery storage system. According to the company, with its existing infrastructure and the physical space for potential growth, this industrial-zoned site can support up to 1,500 MW/6,000 MWh of storage capacity.
Vistra's Moss Landing project is the flagship of its 4,000-MW zero-carbon portfolio, which includes a total of five battery projects in California and Texas:

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