Residential Energy Storage Emerges as New Grid Pillar
Sunrun, the largest provider of residential battery storage and solar systems in the United States, announced on August 17 an agreement with distributed energy platform Voltus. Under the deal, a portion of Sunrun’s thousands of residential storage-plus-solar systems in the PJM and MISO grid regions will be integrated into Voltus’s Bring Your Own Capacity™ (BYOC) program. This initiative will deliver reliable, flexible power to AI hyperscale data centers while bolstering grid stability and creating economic benefits for participating households.
Sunrun CEO Mary Powell stated, "Meeting growing energy demand requires us to maximize every single electron available across the country. This collaboration transforms residential batteries into critical grid resources, providing stable power support for data centers while demonstrating the vast potential of distributed energy."
BYOC Program Pioneers Innovative Power Dispatch Model
Voltus launched its BYOC program last year to convert distributed energy resources into dependable, flexible grid capacity. The program allows large electricity consumers, such as AI data centers, to provide their own reliable capacity, accelerating grid interconnection and supporting grid operations. By aggregating residential batteries, smart thermostats, and other distributed resources, Voltus can reduce overall electricity demand during peak periods while compensating participating households.
Voltus CEO Dana Guernsey noted, "The core of BYOC is turning distributed resources into capacity the grid can count on while maximizing value for end users. This partnership with Sunrun combines residential-scale advantages with a market integration platform, enabling distributed capacity to address surging electricity demand while ensuring reliability, affordability, and growth."
Grid Regions Serve Over 100 Million People
The collaboration targets the PJM and MISO grid regions, which manage electricity dispatch for 13 and 15 U.S. states, respectively, serving a combined population of over 100 million. The PJM region covers East Coast states such as Pennsylvania and Virginia, while MISO spans multiple Midwestern states. Both grids face mounting electricity demand driven by the rapid expansion of AI data centers.
Sunrun currently operates hundreds of thousands of residential energy storage systems across the U.S. While the agreement does not specify the exact number of systems to be dispatched, it emphasizes the use of "a portion of thousands of systems." These systems will be managed through Voltus’s platform, releasing power during grid peak periods to meet the electricity needs of AI data centers.
Unlocking 16.8GW of Flexible Capacity
In a separate recent initiative, Sunrun partnered with Renew Home and Tesla to unlock over 16.8 gigawatts (GW) of flexible capacity from home batteries, solar systems, smart thermostats, and electric vehicles. These resources will be integrated using virtual power plant (VPP) technology to rapidly, affordably, and reliably meet the growing electricity demand from data centers and utilities.
The integration of distributed energy resources is becoming a key solution for balancing grid supply and demand. As AI industry electricity consumption continues to rise, residential energy storage systems not only provide flexible capacity but also play a critical role in supporting the grid during emergencies. While the specific compensation mechanisms and long-term expansion plans for this collaboration have not been disclosed, the partnership highlights the growing importance of residential energy storage in grid dispatch.
As the largest provider of residential battery storage and solar systems in the U.S., Sunrun’s home-to-grid solutions are increasingly becoming a vital component of the power system. Voltus, through its distributed energy resource (DER) platform, connects residential and commercial distributed resources to electricity markets, providing flexible support for the grid. The collaboration between the two companies marks a significant shift in the role of distributed energy, transitioning from a supplementary resource to a core component of the grid.
