Southern Power to develop 345MWh quartet of energy storage projects

By John Parnell
LinkedIn
Twitter
Reddit
Facebook
Email
Southern Power is working with developer esVolta on the portfolio of four projects. Source: Southern Power.

Wholesale power provider Southern Power is to develop up to four utility-scale energy storage projects totalling 86MW / 345MWh.

Of the four projects, all in California, one has already closed financing. Southern Power is working with developer esVolta on the portfolio.

“Battery storage is an emerging technology with the potential to revolutionize how energy is supplied,” said Southern Power President Bill Grantham. “These projects and our partnership with esVolta are a great strategic fit for our business, and these transactions will further position Southern Power to meet our customers' needs as the energy industry continues to evolve.”

Contract details were not revealed but a statement from Southern Power said the deal was aligned with its “low-risk business strategy of developing or acquiring interests in projects covered by long-term contracts”.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

“Southern Power is an outstanding company and a leader in the US electricity sector,” said Randolph Mann, founder and president, esVolta. “Our collaboration will enhance esVolta's ability to capitalize on the strong growth of the energy storage business, and we are excited to work alongside the outstanding team at Southern Power to bring additional high-quality utility-scale storage projects to fruition for our utility customers.”

Larger projects are becoming increasingly commonplace in California. Last month Fluence broke ground on the Alamitos project. The 100MW / 400MWh install is being developed in Southern California for AES, one half of the Fluence joint venture.

In April Southern California Edison signed contracts for six projects with a total capacity of 181MW. The group are in being built to protect the local network from gas shortages after the leak at Aliso Canyon.

15 September 2026
San Diego, USA
You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.

Read Next

May 22, 2026
Battery storage developer and operator Spearmint Energy has closed a US$450 million financing to support its 300MW/600MWh Red Egret battery energy storage system (BESS) project.
May 22, 2026
Long-duration energy storage (LDES) development and investment company Frontier Power USA (FPUSA) has acquired a 480MWh battery energy storage system (BESS) portfolio from developer-operator Bimergen Energy.
May 21, 2026
In this US news roundup, OCI Energy, MN8 Energy, GridStor, and Grenergy advance battery energy storage system (BESS) projects in Texas, California, Colorado, and Georgia.
May 20, 2026
Independent power producer (IPP) Sunraycer Renewables has closed a US$901 million project financing facility, supporting three solar-plus-storage projects in Texas, US.
Premium
May 20, 2026
Energy-Storage.news speaks with Moment Energy’s CTO and co-founder Gabriel Soares, and VP of business development, Carl Mansfield, about recent updates from the second life battery company.