Georgia Power begins construction of newest battery storage system near Macon

Rhea-AI Summary

Georgia Power (NYSE: SO) began construction on a 200 MW battery energy storage system in Twiggs County, adjacent to an existing solar facility, with projected completion in 2027. The system is designed for a four-hour discharge to support winter 2027-2028 capacity and improve integration of intermittent solar.

Georgia Power has 765 MW of BESS under construction (completion in 2026) and is seeking PSC approval for 3,022.5 MW more plus 350 MW of solar+storage; an RFP targets an additional 500 MW by 2031.

Positive

• 200 MW BESS started construction, scheduled for 2027
• 765 MW of additional BESS under construction (completion 2026)
• Company proposes 3,022.5 MW new BESS plus 350 MW solar+storage

Negative

• Projects subject to potential cost and schedule overruns
• Approval needed from PSC for 3,022.5 MW proposed capacity
• Procurement target 500 MW may not be online until 2031

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200 MW BESS to help deliver reliable capacity for customers and meet energy needs in the winter of 2027-2028

ATLANTA, Oct. 20, 2025 /PRNewswire/ -- Georgia Power announced today that it has started construction on a new 200-megawatt (MW) battery energy storage system (BESS) in Twiggs County, southeast of Macon, Ga. The project was selected through competitive processes resulting from the 2023 Integrated Resource Plan (IRP) Update and was approved for construction by the Georgia Public Service Commission (PSC) on Sept. 4, 2025. The Twiggs BESS is a company-owned project that is adjacent to the existing Twiggs County Solar facility.

The 200 MW system is designed to quickly dispatch stored energy over a four-hour period. BESS projects support the overall reliability and resilience of the electric system, while also enhancing the value of intermittent renewable generation resources, such as solar. Storage systems can improve the efficiency of renewable energy by storing excess energy produced during periods when the demand for electricity is lower, for use when the demand is higher, such as on cold winter mornings when solar is unavailable. These BESS facilities help to address power needs identified in the 2023 IRP Update in a cost-effective and strategic manner.

"At Georgia Power, our collaboration with the Georgia PSC and other stakeholders is key to making necessary investments for a reliable and resilient power grid," said Rick Anderson, senior vice president and senior production officer for Georgia Power. "With the construction of the 200 MW BESS in Twiggs County, we will be able to better serve our existing customers and support Georgia's growth. As we expand our energy mix to include more renewable sources, these batteries will play an invaluable role in helping to ensure reliability and flexibility, particularly when renewable sources are not available."

The Twiggs BESS, constructed by Crowder Industrial Construction, LLC, is projected for completion in 2027.

In addition to the Twiggs location, construction is underway on four BESS facilities, consisting of 765 MW in locations throughout the state with estimated completion dates in 2026. These projects, located in Bibb, Cherokee, Floyd, and Lowndes counties, were also approved in the 2023 IRP Update.

Additional BESS Resources Planned and Proposed

As a part of an All-Source Request for Proposals (RFP), Georgia Power is currently seeking approval from the Georgia PSC of 10 new BESS facilities with a total capacity of 3,022.5 MW and two new state-of-the-art solar systems paired with BESS totaling 350 MW. Site selection for the systems was based on deployment capabilities, including the opportunity to locate additional resources at existing company plant sites, other company-owned land, and sites near existing substations. 

Georgia Power is also seeking bids for an additional 500 MW of Energy Storage Systems (ESS) with a storage discharge duration of a minimum of two-hours. The RFP, administered by independent evaluator Ascend Analytics on behalf of Georgia Power, will solicit:

• Standalone ESS with grid charging capability; and
• ESS with Renewable Resource (new or existing) and grid charging capability

The procurement target capacity is 500 MW with a preference to be online no later than 2031. Bids are due for qualified projects in early 2026.

To learn more about how Georgia Power is meeting the needs of customers through a diverse, balanced energy portfolio, and the IRP process, visit www.GeorgiaPower.com. 

About Georgia Power
Georgia Power is the largest electric subsidiary of Southern Company (NYSE: SO), America's premier energy company. Value, Reliability, Customer Service and Stewardship are the cornerstones of the company's promise to 2.8 million customers in all but four of Georgia's 159 counties. Committed to delivering clean, safe, reliable and affordable energy, Georgia Power maintains a diverse, innovative generation mix that includes nuclear, coal and natural gas, as well as renewables such as solar, hydroelectric and wind. Georgia Power offers rates below the national average, focuses on delivering world-class service to its customers every day and the company is recognized by J.D. Power as an industry leader in customer satisfaction. For more information, visit www.GeorgiaPower.com and connect with the company on Facebook (Facebook.com/GeorgiaPower), X (X.com/GeorgiaPower) and Instagram (Instagram.com/ga_power).

Cautionary Note Regarding Forward-Looking Statements
Certain information contained in this release is forward-looking information based on current expectations and plans that involve risks and uncertainties. Forward-looking information includes, among other things, statements concerning future BESS facilities and projected completion dates for construction projects. Georgia Power cautions that there are certain factors that can cause actual results to differ materially from the forward-looking information that has been provided. The reader is cautioned not to put undue reliance on this forward-looking information, which is not a guarantee of future performance and is subject to a number of uncertainties and other factors, many of which are outside the control of Georgia Power; accordingly, there can be no assurance that such suggested results will be realized.  The following factors, in addition to those discussed in Georgia Power's Annual Report on Form 10-K for the year ended December 31, 2024, Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025 and June 30, 2025, and subsequent securities filings, could cause actual results to differ materially from management expectations as suggested by such forward-looking information: variations in demand for electricity; the ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of facilities or other projects; global and U.S. economic conditions, including impacts from geopolitical conflicts, recession, inflation, changes in trade policies (including tariffs and other trade measures) of the United States and other countries, interest rate fluctuations and financial market conditions, and the results of financing efforts; and catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, political unrest, wars or other similar occurrences. Georgia Power expressly disclaims any obligation to update any forward-looking information.

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SOURCE Georgia Power

FAQ

What is the capacity and discharge duration of Georgia Power's Twiggs BESS (SO)?

The Twiggs BESS is 200 MW with a four-hour discharge duration.

When is Georgia Power's Twiggs 200 MW battery storage expected to be completed?

Georgia Power projects the Twiggs BESS to be completed in 2027.

How much battery storage capacity does Georgia Power have under construction and planned (SO)?

Georgia Power has 765 MW under construction and seeks approval for 3,022.5 MW more plus 350 MW solar+storage.

What is the target timeline for the additional 500 MW energy storage procurement by Georgia Power (SO)?

The RFP targets 500 MW of storage with a preference to be online no later than 2031.

How will the Twiggs BESS support reliability for Georgia Power customers (SO)?

The BESS stores excess renewable energy and dispatches it during high-demand periods, helping winter reliability for 2027-2028.

What regulatory approval did Georgia Power receive for the Twiggs BESS (SO)?

The Georgia Public Service Commission approved construction as part of the 2023 IRP Update on Sept. 4, 2025.