“A national surge in microgrid installations, driven by plummeting solar and battery prices, is helping homes, hospitals and businesses maintain power during disasters while stabilizing electricity demand.”
Why this is important: Natural disasters have become increasingly more severe given the expansive impacts of climate change. One does not need to look farther than the devastation of Hurricane Helene, which struck a huge area of the Southeast from Florida, to Georgia, to the Carolinas and beyond. The damage from the hurricane was unprecedented, with Duke Energy reporting that more than 99 percent of its South Carolina customers in the Upstate lost power. One bright spot, however, was the Hot Springs, North Carolina microgrid. This microgrid was installed to service this remote town of about 535 residents, about 40 miles from Asheville, North Carolina. During Helene, the Hot Springs microgrid performed 24/7 from October 2, 2024 through October 8, 2024 on its own 2 megawatts of solar and 4.4 megawatt hours of battery storage, with conservation of energy by customers during this time.
What are microgrids? They are small-scale energy systems that can operate as part of the larger electric grid or independently in times of need, such as following a natural disaster. Generation devices, such as solar panels and/or battery storage systems, and electric management systems to control voltage and power distribution are combined to form a microgrid. By using renewable energy sources with battery storage, microgrids provide clean and resilient sources of electricity. In fact, in 2023, 51 percent of all new microgrid generating capacity was derived from solar power.
Microgrids are most beneficial to remote or environmentally sensitive communities like Hot Springs, and also like the Blue Lake Rancheria in Northern California. After a 6.4 magnitude earthquake struck the area in December 2022, this Native American Reservation leaned on its own electric microgrid. The Blue Lake Rancheria is powered by a 500 kilowatt solar array paired with battery storage, and is also connected to the community’s water systems, food storage, EV chargers, communication facilities and other crucial infrastructure. Use of the microgrid not only provides resiliency in the event of earthquakes, forest fires or rainstorms, but also has reduced electricity costs by 25 percent and reduced the Racheria’s carbon footprint by hundreds of tons of carbon per year. It has been so successful that Blue Lake Rancheria is expanding its microgrid system through the Tribal Energy Resilience and Sovereignty project, and connecting it to three other communities.
Outside Houston, Texas, there are 140 microgrids operated by Enchanted Rock. Totaling 210 megawatts, these microgrids were operated simultaneously following Hurricane Beryl’s landfall. As a result, grocery stores, medical centers and neighborhoods had power during the storm. Microgrids may just be the best solution for communities facing the most significant natural disasters. --- Stephanie U. Eaton