Report: Tennessee Data Center Expansions Could Leave Lasting Electrical Impact
A new report by ThinkTennessee highlights that data center expansions are significantly increasing electricity demand in Tennessee, leading to higher residential electricity bills, particularly in Memphis. The report also raises concerns about grid reliability due to this increased demand. xAI's presence in Memphis is noted, along with its power agreement with MLGW and TVA.
A report by Nashville-based nonpartisan think tank ThinkTennessee, titled "Powering the Boom: Data Centers and What They Mean for Tennessee's Energy Future," indicates that data center growth is reshaping electricity demand and pricing in Tennessee. The report finds that communities with data centers are experiencing a more prominent rise in electricity bills, with residential customers seeing increases while commercial bills decline. Specifically, areas hosting data centers saw a 1.6 percent average increase in electricity bills between 2023 and 2024, compared to a statewide average of 1.3 percent.
Memphis leads the state in data center power needs, requiring over 1000 MW. In 2023, the Memphis City Council approved a 12-percent rate increase for Memphis Light, Gas & Water (MLGW), which was implemented over three years, raising household bills by about $5 per month by January 2024. The ThinkTennessee report noted that residential customers absorbed a 3.2 percent increase, reaching an average of $149.10/month, while commercial customers experienced a 0.2 percent reduction.
The report also highlights concerns about grid reliability in Tennessee, noting a sevenfold increase in data center electricity consumption in the Tennessee Valley region, leading to the first sustained increase in energy demand in two decades. Researchers warned that if demand exceeds projects, the Tennessee Valley Authority (TVA) might be forced to purchase power at higher costs, potentially causing rolling blackouts and further rate hikes. The presence of xAI in Memphis has particularly prompted concerns regarding its impact on the power grid during peak demand.
In 2024, the TVA board approved MLGW's request to provide 150 megawatts of power to xAI, a demand sufficient to power 100,000 homes, according to the Southern Environmental Law Center (SELC). However, the Greater Memphis Chamber stated that xAI has contractually agreed with TVA and MLGW not to draw power from the grid during emergencies or when the grid is strained, ensuring all available power goes to the community. The company is also exploring ways to provide additional energy to the grid.