Southern Power retrofitting 640MWh of battery storage at two California solar power stations

February 8, 2021
LinkedIn
Twitter
Reddit
Facebook
Email
Image: Southern Power.

US wholesale energy provider Southern Power is adding battery energy storage to two solar sites in California.

Storage will be added to the company’s Tranquillity Solar Facility and Garland Solar Facility, with Southern Power – a subsidiary of the Southern Company – also announcing it has signed 20 year power purchase agreements (PPAs) with Southern California Edison (SCE) for the two sites.

At the 205MW Tranquillity Solar Facility in Fresno County California, a 72MW / 288 MWh energy storage system will be added, whilst at the 200MW Garland Solar Facility in Kern Country a 88MW / 352MWh storage facility will be added.

The energy storage components will provide flexibility to SCE and the California ISO (CAISO), enhancing grid reliability and enabling further renewable energy integration.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

Not ready to commit yet?
  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

“These projects will be two of the first co-located solar and storage projects operating in the California market,” said Southern Power president Bill Grantham, adding that the company was excited to be part of the effort to “enhance California’s grid reliability.”

“The addition of these storage resources to our clean energy portfolio is a great strategic fit for our business and will further position Southern Power to meet our customers’ needs as the energy industry continues to evolve.”

Both energy storage projects will be owned in partnership with AIP Management and Global Atlantic Financial Group, who already have existing ownership interests in the two facilities. Southern Power will be responsible for operating the storage, building on their operation of both solar sites since they went into commercial operation in 2016.

This story first appeared on PV Tech.

Read Next

October 31, 2025
Developer Eku Energy and LP Renewables have announced plans for the 400MW/1,600MWh Belah battery energy storage system in Queensland, Australia.
October 29, 2025
IPPs Greenvolt and European Energy have finalised financial deals for solar-plus-storage projects in Denmark and Latvia, while Olana and Energix have enlisted optimisers for BESS projects in Lithuania and Poland, respectively.
October 28, 2025
Singapore’s Jurong Island looks set to host a combined cycle gas turbine (CCGT) power plant with integrated battery storage.
October 28, 2025
AEMO has reported a record 56.6GW of new generation and storage capacity in the National Electricity Market (NEM) development pipeline.
Premium
October 24, 2025
San Diego Gas & Electric (SDG&E) is seeking regulatory approval to acquire an operational portion of a BESS facility located in Imperial County, California, from the US development arm of German multinational energy company RWE. 

Most Popular

Email Newsletter