
Seven States continues to deploy battery energy storage system (BESS) projects and advance regional infrastructure initiatives. Recent projects—including the Montgomery Bell State Park (MBSP) installation—have provided valuable lessons that are shaping our approach moving forward. From operational insights to market signals, these experiences are informing how we deliver value to our member utilities.
1.
Experience
Our experience at MBSP confirmed that integrating battery storage into existing electric systems is well within current technical capabilities. The greater challenge lies in managing the additional workload alongside the daily priorities of utilities. Capturing lessons learned with each installation and applying them at scale to future projects allows each deployment to benefit from the last by reducing costs and increasing speed.
2.
Performance tracks expectations
To date, system performance at MBSP has been reliable, with no material operational issues. Financial results are also aligning with projections, reinforcing confidence in the technology itself. The primary risk areas are: forecasting peak demand and scheduling dispatch accurately to capture expected value—an operational nuance that becomes increasingly important as storage portfolios grow. Demand reduction assets are best served to be installed at reliable grid locations, which tend to be distribution substations, to minimize operational downtime due to extrinsic factors.
3.
Integration impacts performance
While standalone battery controllers can manage basic operations, deeper system integration delivers meaningful benefits. In particular, SCADA integration can significantly reduce the risk of missing peak events by improving visibility and responsiveness. This lesson is informing how Seven States designs future BESS projects, ensuring storage assets are fully integrated into utility operations rather than standalone resources.
4.
Interest in BESS is growing
Across the region, the market for battery storage and Reliability as a Service is shifting from early skepticism to informed curiosity. Utility interest continues to rise, though many are waiting for greater clarity before moving forward. Key sources of hesitation include uncertainty around TVA rates, evolving TVA programs, and open questions related to federal tariffs and tax policy. As these issues come into focus, we expect interest to translate into action.
Together, these takeaways are guiding Seven States as we advance upcoming BESS projects and broader infrastructure initiatives. By applying proven lessons, prioritizing integration, and maintaining a regional focus, we are building a more resilient and flexible energy future for the communities we serve.




