Georgia Power’s Battery Storage Adoption

Georgia Power has been progressively expanding its battery energy storage portfolio as part of its Integrated Resource Plan (IRP) updates, approved by the Georgia Public Service Commission (PSC) in 2023 and 2024. Alongside the new Twiggs County project, the utility currently has 765 MW of additional BESS capacity under construction across Bibb, Lowndes, Floyd, and Cherokee counties, scheduled for completion by 2026.

The company’s first-ever BESS - at Mossy Branch in Talbot County (65 MW) - entered commercial service in late 2024 and is now functioning as a model for future deployments. Furthermore, Georgia Power has issued a request for proposals (RFP) for another 500 MW of energy storage, targeting systems capable of pairing with renewables or operating independently on the grid. These efforts represent a shift from experimental pilots to grid-integrated battery storage as a core resource for managing renewable variability and peak demands.

Importance of the Twiggs County BESS Project

The Twiggs County 200 MW BESS is designed to deliver stored energy over a four-hour discharge duration and is co-located with the existing Twiggs County Solar facility, enabling it to capture and store excess solar generation for release during high-demand periods such as early mornings or evenings.

Approved by the PSC on September 4, 2025, the project will be completed by 2027 and constructed by Crowder Industrial Construction, LLC. According to Georgia Power’s Senior Vice President Rick Anderson, this project will enhance grid resilience, reduce the need for fossil peaking plants, and strengthen service reliability as Georgia’s population and energy consumption continue to grow. It also aligns with the company’s longer-term target of gradually decarbonizing its generation portfolio while safeguarding grid dependability.

The State of Battery Energy Storage in Georgia

As of late 2025, Georgia hosts approximately 146 MW of operational battery energy storage capacity, with another nearly 4,000 MW under construction, approved, or in development across its utility territories. The state has rapidly emerged as the Southeast’s most active hub for utility-scale energy storage, primarily driven by Georgia Power’s aggressive buildout under its Integrated Resource Plan (IRP) framework.

Operational Capacity

Georgia currently operates five utility-scale BESS projects totaling 146 MW. The largest of these is Georgia Power’s 65 MW Mossy Branch Energy Storage Facility in Talbot County, commissioned in November 2024, which serves as the state’s first fully dispatchable grid-connected battery plant. Smaller systems are distributed among local electric membership cooperatives (EMCs) and private renewable operators.

Capacity Under Construction

Georgia Power is currently constructing five major BESS facilities totaling 965 MW, including:

• Twiggs County BESS (200 MW) – co-located with a solar farm, completion by 2027

• Four projects (765 MW) across Bibb, Lowndes, Floyd, and Cherokee counties, expected online in 2026

These facilities are designed with four-hour discharge capability, offering flexible, peak‑shifting capacity and grid stabilization during winter and summer load peaks.

Approved and Proposed Growth

In addition to active builds, Georgia Power has petitioned the Public Service Commission (PSC) for the right to construct and own 3,022.5 MW of new standalone BESS projects, along with 350 MW of hybrid solar-plus-storage facilities. The IRP also includes a 2025 Request for Proposals (RFP) to contract 500 MW of third-party storage capacity by 2031. Altogether, this plan would expand Georgia’s total storage capacity to more than 4.5 GW by the early 2030s, integrating storage into all major service areas.

Broader Utility Participation

Beyond Georgia Power, regional cooperatives such as Oglethorpe Power and GreyStone Power have launched pilot BESS installations ranging from 5 to 20 MW, testing resilience applications for remote substations and microgrids. These projects complement the primary utility’s centralized efforts by providing localized grid stability and renewable optimization.

Summary of 2025 BESS Landscape in Georgia

Taken together, Georgia is on pace to exceed 5 GW of total battery energy storage capacity within the next decade. This rapid growth positions the state among the top five emerging storage markets in the U.S., driven by utility modernization, renewable integration, and a deepening local battery manufacturing ecosystem that shortens supply chains for future projects.