Google Signs 1GW Virtual Power Plant Deal in PJM

Google has contracted an additional 1,070 megawatts of distributed capacity from Voltus in the PJM grid, a tenfold expansion of a 100MW virtual power plant (VPP) deal the two companies announced in June, according to a Voltus press release on Wednesday.

Google described the agreement on its own blog as a “10-fold expansion” of the earlier commitment. Voltus calls the portfolio “one of the largest known distributed capacity portfolios deployed by a hyperscaler to date”. PJM runs the grid for 67 million customers across 13 states and the District of Columbia, and is the market most stretched by data-centre demand.

Google is paying homes and businesses to be flexible

A virtual power plant does not build generation. Voltus aggregates distributed energy resources such as batteries, building controls and commercial loads that can cut demand or discharge when the grid is tight. It then sells that flexibility as capacity. Under Voltus’s “bring your own capacity” model, a large power user such as Google pays for new flexible resources to be added to the grid to offset its own demand.

“Expanding our initial commitment tenfold demonstrates our core effort to actively bring our own capacity to the grids that serve us,” said Ellen Zuckerman, head of energy market development for North & South America at Google, according to the release. Dana Guernsey, CEO of Voltus, said the partnership would “bring much needed clean capacity online, at gigawatt scale”.

Voltus cites an analysis by the Brattle Group suggesting VPPs could save consumers more than $100 billion over a decade. That is a sector-wide estimate, not a forecast for this deal.

How long the deal runs is unclear

The sources disagree on the term. DatacenterDynamics reported that the agreement is “expected to last approximately three years”. Latitude Media quoted Guernsey saying the contract “extends through 2040” and offsets demand from multiple data centres. Neither company’s announcement resolves the point.

Latitude also reported that the first 100MW tranche was “over-subscribed”, and that batteries will make up “a chunk” of the new portfolio. DCD said Voltus manages more than 7.5GW of distributed resources across all nine North American wholesale markets.

Buying flexibility is faster than building plants

The appeal for Google is speed. New gas plants and grid connections in PJM take years, while flexible load and batteries already sitting behind customer meters can be signed up in months. If big tech can bring its own capacity in this form, it eases pressure on the regional capacity prices that can push up household bills, an issue at at the centre of the argument over who pays for AI’s power.

The risk is reliability at scale. A gigawatt of scattered resources has to respond when called, during the same heatwaves and cold snaps that drove the US Energy Department’s emergency order letting PJM call on data-centre backup generators. Home batteries have shown what is possible: Sunrun and Tesla systems delivered a record 745MW to California’s grid. Utilities are also buying on-site options, such as AEP’s deal for up to 1.6GW of Mainspring linear generators.

Tim Hade, who founded Brightfield and now serves as SVP of battery energy storage at Voltus, according to Latitude Media, framed the challenge plainly at Latitude’s Flex Summit: “What we have to prove over the next three, four, or five years is that we can do this at 10-, 15-, 20-gigawatt levels.” The first real test is whether this 1GW performs during PJM’s next grid emergency.