Tennessee Partners Launch ‘Second-Life’ Battery Storage Project as Electric Vehicle Adoption Grows
June 20, 2022

Nissan, Middle Tennessee Electric, UT-Oak Ridge Innovation Institute, Tennessee State University and Seven States Power Corp. Announce Innovative Battery Storage Project

 

FRANKLIN, Tennessee – June 16, 2022 – Nissan, Middle Tennessee Electric, the University of Tennessee-Oak Ridge Innovation Institute, Tennessee State University and Seven States Power Corporation are teaming up to launch an innovative second-life battery storage project.

The rapid transition to electric vehicles and the escalating need for energy storage is driving demand for innovative approaches to repurposing used electric vehicle (EV) batteries to enhance the resilience of America’s electric grid. This partnership seeks to build a solution that can be helpful locally and modeled globally.

Used battery packs from Nissan ’s all-electric LEAF – the first mass-produced EV in the U.S. – will be used to construct two Battery Energy Storage Systems (BESS) at Nissan America’s headquarters in Franklin, Tenn. The retrieved packs will undergo testing and be assembled in modular, scalable storage systems. The BESS systems will provide supplemental power supply and peak demand shaving* for Nissan’s facilities and support the Middle Tennessee electric grid.

This project will repurpose Nissan’s used EV batteries, giving them a “second life” as a BESS for the Nissan electrical system. The group will also research how to best reduce energy usage, improve battery life, optimize energy distribution within the system and into the grid, house and scale the packs and system, in addition, make it easy and safe for consumers to connect to the electric grid.

The project leverages a circular process model. Batteries lose capacity to fully charge over time. When EV batteries reach that point, the battery’s performance is no longer ideal for use in the vehicle and the battery is replaced. These used batteries have an opportunity to be repurposed in other long-life applications.

The partners have built a strong, cross-collaborative team to assist in the implementation, assess performance and discover potential market applications. The University of Tennessee and Oak Ridge National Laboratory’s UT-Oak Ridge Innovation Institute will lead the research aspect of the project with Tom Zawodzinski , University of Tennessee Knoxville-Oak Ridge National Laboratory’s Governor’s Chair for Electrical Energy Conversion and Storage heading the effort. Middle Tennessee Electric , the utility provider for Nissan’s U.S. headquarters, will assist in integrating the battery storage unit into the electric grid and assess electric system impacts. Seven States Power Corporation will provide expert utility insights, consistent with its mission to design, develop, and deploy next generation technology for local power companies in the Tennessee Valley. Tennessee State University ’s College of Engineering will support this project by providing opportunities to develop diverse workforce and support environmental justice initiatives.

In addition to repurposing EV batteries, the partners will explore how best to package the battery cells to improve the ease of maintenance and to test the functionality and connectivity of control systems and building maintenance systems.

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*Peak demand shaving is the proactive management of expected spikes in energy demand. By reducing or “shaving” peak energy demand in day-to-day operations, energy can be produced more efficiently and at lower costs to the end user.

 

PARTNER QUOTES FOLLOW:

“Nissan has a long history in electrification and battery development, which we have applied to the Tennessee-built Nissan LEAF and the all-new Ariya coming in the fall. Partnering on projects like these play a critical role in driving our Ambition 2030 vision and carbon neutrality goals in the U.S.”  Kent O’Hara , President, Nissan 4R Energy U.S.

“MTE is appreciative of the collaboration with Nissan, and others, on this vital research that will positively impact the evolution of the electric grid. Distributed energy resources, such as second life batteries, will continue to support the steps MTE is taking toward smart grid investments.” Brad Gibson , Chief Cooperative Business Officer at Middle Tennessee Electric.

Seven States Power Corporation is excited to lend its technical expertise to find innovative ways to design, develop, and deploy battery technology in a way that benefits all stakeholders. Second life battery technology is one great example of how our region can lead the nation in technology and advanced manufacturing in the years to come.” Betsey Kirk McCall, President & CEO of Seven States Power Corporation

“Through the UT-Oak Ridge Innovation Institute, we’re able to bring together world-renowned scientists and engineers from UT and Oak Ridge National Laboratory like Tom Zawodzinski, our UT-ORNL governor’s chair in Electrical Energy Storage, to work with Nissan and other industry leaders to develop innovative, practical solutions.” Joan Bienvenue , Executive Director and Vice-Provost, University of Tennessee-Oak Ridge Innovation Institute

“This project provides an exciting opportunity to pull together a multi-disciplinary team of scientists and engineers to engage in a technically challenging, system-level problem with real-world outcomes. At both UT Knoxville and Oak Ridge National Laboratory, we draw from areas as diverse as electrical engineering, materials science and chemical sciences and engineering, to help provide guiding principles to realize maximum performance while maintaining safe operation.  On top of that we hope to use this as a springboard for developing an educated and diverse workforce in Tennessee and to begin to identify with our partners’ relevant areas of environmental justice impact.” Thomas Zawodzinski , UT-Oak Ridge National Laboratory Governor’s Chair in Electrical Energy Storage, University of Tennessee Knoxville

“As the EV battery industry moves to deploy second life battery technologies, it is key that we prepare an inclusive, technically capable workforce that is equipped with the knowledge and technical ability to enter industry. Tennessee State University’s College of Engineering is excited for this opportunity to create educational programs to aid in diverse workforce development for future environmental, electrical, and mechanical engineers.  Additionally, Tennessee State University has a commitment to environmental justice and is prepared to provide technical support to communities in need.” Andrea Resch Gardiner , Assistant Professor of Civil Engineering, Tennessee State University

 

PLEASE NOTE: Above is an image of Nissan’s Circular Process that is referred to in this release. This diagram was taken from the “ Nissan Motor Corporation Sustainability Report 2021 ” located at https://www.nissan-global.com/EN/SUSTAINABILITY/LIBRARY/SR/2021/

By Jessica Bradshaw September 17, 2025
Seven States Power Corporation (Seven States) is exploring opportunities to deliver new power generation to the Tennessee Valley. The effort is bolstered by a landmark $415 million zero-interest loan and $24 million grant from the U.S. Department of Agriculture Rural Utilities Service (USDA RUS), designed to meet the growing demand for power while strengthening grid reliability. The opportunity signals a creative solution toward advancing American Energy Dominance in the southeast region. “We are excited to get underway with this first of what we hope will be a number of USDA-assisted projects across the Tennessee Valley,” said Betsey Kirk McCall, President and CEO of Seven States Power Corporation. “We understand this initiative aligns with national priorities on energy dominance and security.” The project is intended to use domestically produced solar panels and battery storage that tie into the electric grid, generating a new source of affordable solar power for residential and commercial customers and providing a new source of stored energy that can be used to meet peak demands as needed. The project is proposed to be constructed on industrial land owned by the Economic Development Growth Engine (EDGE) and subleased to Seven States. “MLGW is supporting Seven States in this effort by exploring the feasibility of this project as a way to strengthen and modernize our grid to create greater reliability for our customers and potentially help us maintain some of the lowest electric rates in the country,” said Doug McGowen, President and CEO of MLGW. A subleasing arrangement approved by EDGE is the first step toward this innovative solution. Seven States and MLGW will continue to assess the best technical and contractual path forward to delivering more than 200MW of solar generation and battery storage. This collaboration illustrates how federal funding, coupled with local partnership, can accelerate how energy is generated and transmitted to strengthen the grid. This new generation could serve a growing Shelby County and Tennessee Valley by December 2027. ### About Seven States: Seven States Power Corporation is a generation and transmission cooperative with a mission to leverage innovative technology to design, develop, and deploy energy solutions, together with more than 100 member-owner local power companies, across the Tennessee Valley. A key aspect of Seven States’ formation was the ability to finance utility-scale generation assets, expand energy production, and modernize infrastructure to support the growing grid. About MLGW: MLGW is the nation's largest three-service municipal utility, serving more than 440,000 customers. Since 1939, MLGW has met the utility needs of Memphis and Shelby County residents by delivering reliable and affordable electricity, natural gas, and water service.
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In today’s rapidly evolving landscape, the energy ecosystem is more complex—and more essential—than ever. Every community, every business, and every innovation depends on reliable, affordable, and abundant power. At Seven States, we recognize this ecosystem—past, present, and future—is critical to unleashing American energy and empowering the Tennessee Valley. Many different forms of energy play a vital role in fueling today’s industries. From nuclear, coal, and natural gas plants that provide baseload reliability, to solar and battery storage that deliver power quickly to the grid, America can dominate this industry and lead globally given the abundant resources and technological advancements present in our country. At the core of our cooperative work is a mission that is as straightforward as it is powerful: megawatts. From the Southaven combined cycle gas plant we co-owned with TVA to the $439 million funding award we received earlier this year from USDA, Seven States has always been laser-focused on building and owning capacity of all sizes that deliver real, measurable impact. Our relationship with USDA opens the door to more potential funding for the Valley. As such, we have submitted for consideration additional funding requests up to $5.6 billion in financing capacity to acquire 4,000MW of utility-scale natural gas units and another $320 million to deploy 300MW of distribution-scale battery storage on 75+ project sites. By working incrementally with each customer and at-scale across the Valley, we are empowering our member-owner LPCs to meet consumer demand in an evolving utility marketplace. As a reminder, Seven States was awarded a $414 million zero-interest loan and $25 million grant to built utility-scale power generation in the Valley. Of note, while other projects throughout the Valley have been impacted by recent federal funding changes, the USDA New ERA funds awarded to Seven States remain intact and the project is progressing forward with a new site. Our mission is not just about preparing for the future; it’s about building the here and now. New power generation, reliability as a service, transportation infrastructure, and grid modernization are not concepts on a drawing board—they are real projects, powering homes, businesses, and institutions today. By anchoring innovation in present action, we ensure that the Tennessee Valley doesn’t just keep pace with change but sets a fast pace for energy leadership. In the end, understanding the energy ecosystem means recognizing its depth, complexity, and interdependence. At Seven States Power, we embrace that complexity as our opportunity—to deliver megawatts, unleash American energy, support economic development, and to lead the Valley into an energy future that honors where we’ve been while advancing where we must go. 
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