Google expands a 1-gigawatt virtual power plant with Voltus across the PJM grid

Google said it is expanding a partnership with Voltus to build a virtual power plant capable of delivering 1 gigawatt of capacity across the PJM grid region, an area that serves 67 million people across 13 states and Washington, D.C. The announcement, published on Google’s official blog, frames the effort as a way to bolster grid reliability during peak demand while offering economic benefits to participating customers.

A virtual power plant (VPP) is an energy program that pools many distributed resources, such as smart thermostats or batteries, and coordinates them so they behave like a single, dispatchable power resource. In this case, Google said Voltus will aggregate flexible capacity from local businesses and homes and connect it to what it describes as a Google-funded virtual power plant.

The company’s explanation focuses on how the pooled assets respond during periods of high electricity demand. Google said participating devices and equipment temporarily reduce energy use, supporting grid reliability when the system is under strain. Rather than adding traditional generation, the approach relies on demand flexibility, turning down consumption in a controlled way when it can help avoid reliability problems.

Google also said the program is designed so customers receive direct economic benefits. According to the blog post, participants can receive bill savings and cash payments in return for making their flexible capacity available during peak demand windows. Google did not specify the amount of payments or the eligibility rules in the announcement.

The expansion is described as a continuation of work Google began earlier in 2026. Google said the new 1-gigawatt agreement builds on a 100-megawatt arrangement announced earlier this year, and that the update represents a 10-fold increase. Google characterized the resulting distributed capacity portfolio as one of the largest deployments of its kind by a hyperscaler to date.

The PJM footprint matters because it covers a large, interconnected portion of the U.S. power system and is responsible for grid operations and reliability within its service territory. By positioning flexible demand resources within PJM, Google is effectively tying distributed energy coordination to the needs of a major regional grid operator, where peak demand management can be critical.

For Alphabet, the initiative fits into a broader pattern of using cloud and infrastructure capabilities to support large-scale systems beyond traditional software. Google tied the project to “actively bring new capacity to local grids,” and it also linked the strategy to affordability, suggesting that flexibility programs can help manage electricity demand without relying solely on new generation buildouts.

Voltus is the operational partner in the program, and Google described its role as aggregating flexible capacity from participating assets such as smart thermostats, batteries, and industrial equipment. These categories are typical of VPP programs because they can be adjusted for limited periods while maintaining service quality, such as reducing heating or cooling set points, drawing less power from an industrial process, or discharging or charging batteries under constraints.

Still, the announcement leaves several practical details unclear. Google did not provide a timeline for when the full 1-gigawatt capacity will be available, how performance will be measured and verified, or what portion of the portfolio comes from each asset class. It also did not disclose contract terms, the specific grid services the VPP is intended to provide, or how customer participation scales over time.