Google and Voltus plan to assemble a gigawatt-scale virtual power plant from homes and businesses that can adjust electricity use when the PJM grid is under strain. Announced on 22 October, the agreement pays for coordinated flexibility through batteries, smart thermostats and industrial assets. Participating customers are to receive bill savings or cash payments.[1][2]
The arrangement expands the companies’ Bring Your Own Capacity programme in PJM, which serves about 67 million people across 13 states and Washington, DC. Google funds the portfolio; Voltus recruits and coordinates distributed resources. A customer may shift a flexible process or reduce grid demand using a battery when the portfolio is called.[1][2]
Turning many small changes into a grid resource
Ordinary electricity accounts track generation and consumption. A virtual power plant coordinates many dispersed assets as though they were a single flexible resource. A customer might reduce demand for an hour when the grid is under stress, then return to normal operations. At the system level, reliable load reduction can help bridge a supply shortage just as an increase in generation could, although the engineering properties are not identical. A megawatt of curtailed demand is valuable only when the relevant site is available, the reduction can be measured and the grid operator can rely on it when called.[1][2]
The capacity descriptions are not fully reconciled. Google calls the agreement a one-gigawatt programme and a tenfold expansion of the earlier 100-megawatt deal. Voltus also uses the one-gigawatt description but says the October announcement adds 1,070 megawatts. The releases support “gigawatt-scale” as the common description, while leaving the precise total unclear.[1][2]
The immediate business case is unusually direct. Power-hungry companies create local reliability and grid-cost pressures when new data centres arrive faster than conventional infrastructure. A flexible demand portfolio may allow some additional load to be accommodated without relying exclusively on building new firm generating stations or transmission links. It does not eliminate the energy the data centres consume, and it cannot replace every kind of dependable capacity. The resource has to be called within the limits of how far and how often participating customers are willing to adjust their use.[1][2]
From an agreement to dependable capacity
Three stages determine what the grid can rely on: the capacity contracted, the portfolio qualified under the relevant market rules, and the power reduction actually delivered during an event. Customer availability, battery charge and the permitted duration of an adjustment affect how those stages line up.[1][2]
Voltus says customers will receive financial benefits for participating. Its release also cites a Brattle Group projection of more than $100 billion in US savings over a decade from better grid utilisation. That national scenario is separate from the financial results of this agreement, which the announcement does not measure.[1][2]
What an event would reveal
The portfolio’s value will become clearer when recruitment, qualification and dispatch results are reported together. Delivered megawatts, the duration of each response and payments to participating customers will show how the agreement converts data-centre demand into a usable resource for the wider grid.[1][2]
Sources & further reading
- Google and Voltus Announce One Gigawatt Bring Your Own Capacity Agreement in PJM Voltus · 22 Oct 2026 · Accessed 26 Oct 2026
- We are working with Voltus to build a 1-gigawatt virtual power plant Google · 22 Oct 2026 · Accessed 26 Oct 2026