The initial development of the project was undertaken by Dynegy Marketing and Trade (Dynegy), which was merged with Vistra Energy in April 2018. The project is located at the retired Moss Landing gas-fired power plant, which was built by PG&E near Moss Landing Harbor, Monterey County, California, US. The Moss Landing BESS phase one comprises a 300MW modular, fully integrated, pad-mounted lithium-ion battery energy storage system capable of holding 1,200MWh of electricity. The batteries were supplied by LG Energy Solution and have a. The battery energy storage facility is connected to the California Independent System Operator (CAISO) grid via the existing 500kV. Luminant, a subsidiary of Vistra Energy, was engaged in the construction of the Moss Landing phase one battery storage project. Fluence, a global energy storage technology and services specialist based in the US, was the engineering contractor for the project.