By Aron Bowman, President, ELM MicroGrid
Over the last several years, the energy industry has focused heavily on large-scale Battery Energy Storage Systems (BESS) deployed alongside generation and transmission infrastructure. These massive installations, often delivering hundreds of megawatt-hours of storage capacity, have become increasingly important as utilities work to support electrification and maintain grid stability.
While those projects capture headlines, a quieter but equally important trend is gaining momentum across the utility sector: the adoption of distributed energy storage through smaller, microgrid-capable Battery Energy Storage Systems.
From some of the nation’s largest investor-owned utilities to smaller municipal utilities and electric cooperatives, organizations are turning to 1 MW to 5 MW microgrid solutions to improve resiliency, optimize costs, and modernize aging infrastructure. Through ELM MicroGrid’s work with utilities across the country, we’ve identified three primary drivers behind this growing adoption:
- Substation Resiliency and Non-Wires Alternatives
- Time-of-Use Cost Shifting
- Grid Modernization to Support EV Adoption
Substation Resiliency and Non-Wires Alternatives
North America is home to more than 55,000 substations, ranging from large transmission facilities to small distribution substations serving remote rural communities.
Historically, utilities have improved substation resiliency by installing secondary loop feeds or deploying backup fossil-fuel generators. While effective, these approaches can be expensive to build, maintain, and operate.
Today, utilities are increasingly leveraging microgrid-capable Battery Energy Storage Systems as a more flexible and efficient alternative.
Through advanced microgrid integration, these systems can automatically provide backup power during outages, enabling substations to continue serving customers when the primary power source is unavailable. Compared to building miles of additional utility infrastructure, microgrid-capable BESS deployments can often provide a more cost-effective solution while requiring significantly less maintenance than traditional backup generators.
In some applications, these systems serve as a complete non-wires alternative. Rather than relying on new transmission or distribution infrastructure, utilities can deploy localized energy resources that allow customers to operate independently from the main grid when needed. This approach can improve reliability and uptime while reducing risks associated with power line failures, including wildfire concerns in vulnerable regions.
As utilities continue evaluating long-term resiliency strategies, distributed energy storage is becoming an increasingly valuable component of the modern grid.
Time-of-Use Cost Shifting Creates Daily Value
One of the unique advantages of a microgrid-capable BESS is that it can provide value every day, not just during emergencies.
While these systems are always ready to support resiliency requirements, batteries generally perform best when they are utilized regularly. In fact, one of the first things we discuss with customers is that batteries often achieve longer, healthier operating lives when they are cycled on a consistent basis.
With the support of an advanced Energy Management System (EMS), utilities can charge batteries when energy prices are low and discharge stored energy when prices increase. This ability to shift energy usage based on time-of-use pricing creates immediate operational and financial benefits.
Over the life of the system, these savings can significantly improve project economics and help the BESS generate value beyond its resiliency benefits.
For smaller utilities and electric cooperatives, the opportunity can be even greater. Many generate a portion of their electricity through local renewable resources, such as solar photovoltaic (PV) systems. A microgrid-capable BESS can store that renewable energy and deploy it when demand or market conditions make it most valuable.
This combination of resiliency, renewable integration, and operational savings is one reason distributed energy storage continues to gain traction across the utility sector.
Grid Modernization to Support EV Adoption
The fastest-growing driver for microgrid BESS adoption is the need to support increasing electric vehicle (EV) usage.
While much attention has been given to public charging infrastructure, the majority of EV charging is expected to occur at home. Residential EV chargers have the potential to substantially increase peak electricity demand for individual households.
While that increase may appear manageable on a single-home basis, the impact becomes significant when multiplied across an entire distribution substation service area.
Utilities face a complex challenge. Expanding every distribution substation to accommodate future EV demand is costly and often constrained by available land, transmission capacity, and construction timelines. Additionally, EV charging demand is not constant. It is highly concentrated during certain periods, often creating peak load requirements for only four to five hours each evening.
This is where grid modernization solutions powered by microgrid-capable BESS technology are proving highly effective.
By deploying a Battery Energy Storage System at the substation level and utilizing an intelligent Energy Management System, utilities can store energy during lower-demand periods and discharge it during evening charging peaks. This approach helps manage temporary demand spikes without requiring immediate large-scale infrastructure upgrades.
The result is a cost-effective, scalable solution that helps utilities improve grid stability, accommodate transportation electrification, and support future growth.
Small Systems, Big Impact
As utilities continue to navigate rising electricity demand, renewable energy integration, and evolving customer expectations, smaller distributed BESS deployments are becoming a critical tool for grid transformation.
Whether improving substation resiliency, optimizing energy costs, or addressing the challenges associated with EV adoption, microgrid solutions are helping utilities modernize the grid one step at a time.
While large utility-scale storage projects will continue to play an essential role in the energy transition, the growing adoption of microgrid-capable Battery Energy Storage Systems demonstrates that some of the most impactful changes can happen at the local level.
The future of energy isn’t being built solely through massive infrastructure projects. It’s also being shaped through intelligent microgrid integration, distributed energy storage, and practical grid modernization solutions that deliver value where utilities and their customers need it most.