May 14, 2021: Southern Power announced on May 4 it had awarded Mitsubishi Power Americas, and Powin, an order for two utility-scale battery energy storage system projects totalling 640MWh.
The BESS projects are among the first collocated solar and storage projects in California and represent some of the largest retrofits of solar and storage in North America to date. They are designed for a 20-year life cycle and four hours of energy storage duration.
Southern Power’s 205MW Garland Solar Facility in Kern County will add 88MW and 352MWh of energy storage, and its 204MW Tranquillity Solar Facility in Fresno County will add 72MW and 288MWh.
Both projects are scheduled to come online in 2021.
The energy storage projects will be owned in partnership with AIP Management and Global Atlantic Financial Group, both of which have existing ownership interests in the Garland and Tranquillity solar facilities that went into commercial operation in 2016.
Southern Power operates the solar projects and will be responsible for operating the energy storage projects upon completion.
Geoff Brown, CEO of Powin, said, “This award highlights the fact that large-scale solar PV paired with energy storage is cost competitive.”