Georgia Power leaders joined elected officials from the Georgia Public Service Commission (PSC), Georgia legislature, and Talbot and Muscogee counties on Thursday to mark commercial operation of the company’s first “grid-connected” battery energy storage system (BESS). The Mossy Br Contact online >>
Georgia Power leaders joined elected officials from the Georgia Public Service Commission (PSC), Georgia legislature, and Talbot and Muscogee counties on Thursday to mark commercial operation of the company’s first “grid-connected” battery energy storage system (BESS). The Mossy Branch Battery Facility is capable of 65 megawatts (MW) of battery storage that can be deployed back to the grid over a four-hour period, adding resiliency to the state’s power grid and helping ensure reliable energy for a growing Georgia.
“We know our customers depend on us to make the investments in our state’s power grid needed to deliver reliable energy to their homes and businesses around the clock,” said Kim Greene, chairman, president and CEO of Georgia Power at the Mossy Branch site on Thursday. “Battery energy storage is an example of a new technology that will make our grid more reliable and resilient every day, and especially during extreme weather events. The Mossy Branch facility is an incredibly valuable addition to our grid and commercial operation of this site is a significant milestone in our continued work with the Georgia PSC to evolve and enhance Georgia’s power grid.”
Georgia Power worked with industry leader Wärtsilä to provide the engineering, procurement and construction services for the Mossy Branch facility. The project utilizes the GEMS Digital Energy Platform, Wärtsilä’s energy management system, to manage the facility and provide secure operations, and is built with Wärtsilä’s Quantum, a fully integrated, modular, and compact energy storage system.
New Battery Energy Storage Projects Underway Across Georgia
An additional 1,000 MW of new battery energy storage is expected to be procured in the coming years through competitive bidding processes and, in August, Georgia Power also announced the locations of 500 MW of new BESS projects that will be owned by the company. These new company-owned projects include 128 MW located adjacent to Robins Air Force Base (Bibb County); 49.5 MW located adjacent to Moody Air Force Base (Lowndes County); 57.5 MW located on the former Plant Hammond site (Floyd County); and 265 MW as a second phase of BESS at McGrau Ford. Read more here.
To learn more about how Georgia Power is meeting the needs of customers through a diverse, balanced energy portfolio, visit
Georgia Power has received approval from the Georgia Public Service Commission (PSC) to build, own, and operate a new battery energy storage system. Known as the Mossy Branch Battery Facility, the grid-charging battery system is located on 2.5-acres in Talbot County, near Columbus, Georgia.
This innovative facility will be the first standalone Battery Energy Storage System (BESS) on the Georgia Integrated Transmission System and represents a key milestone in the company’s efforts toward a more sustainable energy future.
The 65 MW/260 MWh system is part of a larger 80 MW BESS portfolio approved in the Company’s 2019 Integrated Resource Plan (IRP).
Wilson Mallard, Georgia Power Renewable Development Director.
It is an exciting time to be working on new ways to maximize the value of sustainable, renewable energy and the addition of battery storage complements and enhances the value of renewable generation.
“Developing storage technologies of this magnitude will help us to continue meeting our customers’ needs.”
“The Mossy Branch project will help the company evaluate the value and benefits battery storage provides to the electric system, as well as learn how to optimize operation and maintenance of the BESS facilities.”
The Mossy Branch Battery Facility will be designed as a standalone unit that will connect to and charge directly from the electric transmission grid – the interconnected system of high voltage wires and equipment that moves large amounts of electricity across the state.
The company has selected Wärtsilä to provide this new facility’s Engineering, Procurement, and Construction services.
Project to Provide Learnings, Enhance Renewable Generation
The goal of the Mossy Branch Battery Facility is to evaluate in a real-time environment the technical performance and economics of the system, including the ability to use the BESS for multiple applications.
Data received from the facility will help the company validate and support the optimization of the energy storage assets to meet customer needs. Mossy Branch will also allow Georgia Power to refine maintenance practices that maximize battery storage reliability and useable life.
Battery energy storage integrated with the electric system both complements and enhances the value of intermittent renewable generation. It has a fast response capability such that it can quickly respond to and provide electricity when a renewable resource is no longer providing its intended output due to weather or other causes.
Additionally, batteries aid the performance of intermittent resources by storing excess energy that intermittent facilities produce during periods when demand for electricity is low, for use when demand is higher, such as cold winter mornings.
This improves the utilization of renewable resources and the overall efficiency of the system. Battery storage can also rapidly respond to other system events, such as other generating units going offline, which ultimately helps increase the reliability of the Georgia Power system.
Georgia Power to launch first battery energy storage system on state’s transmission grid, Atlanta, October 7, 2021
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