Virtual power plant (VPP) platform profile
CPower: NRG’s commercial demand response platform
How one of the largest U.S. commercial and industrial demand response providers works, and what NRG’s 2026 acquisition changes.
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The short answer
- CPower is one of the largest C&I demand response providers in the U.S. It reports 6.7 GW of customer capacity across about 23,000 sites (CPower).
- It is now part of NRG Energy. NRG closed its purchase of CPower and 13 GW of gas plants from LS Power on January 30, 2026 (NRG Energy), putting a demand-side platform alongside one of the largest generation fleets.
- PJM is its center of gravity. About 4 GW of the roughly 6 GW under contract at the time of the deal was in PJM (Utility Dive).
- Use is rising fast. Customers delivered 38 GWh of load relief in the first nine months of 2025, versus 16 GWh in all of 2024 (Utility Dive).
Where CPower fits
Highlighted boxes are the roles this company plays; the green bar shows where its programs sit from demand response to an orchestrated VPP.
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What CPower does
CPower registers commercial, industrial and public-sector sites in capacity, emergency and economic demand response programs, dispatches them when called and shares the revenue. With NRG, it manages 4,600 customers and 21,000 participating sites and says it has returned more than $1.5 billion to energy users since 2015 (CPower). Recent agreements include New Jersey’s state government facilities in PJM (Renewable Energy World) and a program with Generac to enroll commercial generators and other resources (pv magazine USA).
CPower customer load relief
Gigawatt-hours (GWh) of load reduction delivered to the grid
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Why NRG ownership matters
NRG paid about $12 billion for 18 gas plants and CPower; the Federal Energy Regulatory Commission approved the deal after finding it would not harm competition (Utility Dive). The combination puts generation, retail supply (through brands such as Reliant) and demand response under one owner, alongside NRG’s residential thermostat VPP with Everyday Electric in Texas (NRG Energy).
For grid operators and regulators, that raises a familiar question: when one company owns both supply and demand-side resources in a capacity market, how is demand response offered and verified? For C&I sites, it mostly means a larger counterparty and the option of bundling supply contracts with demand response.
Where CPower sits on the spectrum
Most CPower revenue still comes from capacity and emergency programs, where a site commits to curtail when the grid operator calls and is paid mostly for being available. That is demand response rather than an orchestrated VPP. The direction of travel is more frequent dispatch, more batteries and on-site generation, and pairing with retail supply.
What it means for program design
PJM capacity sets the price
With most capacity in PJM, CPower’s offers track PJM capacity prices; utility programs elsewhere need to compete on certainty, not just price.
Distinguish availability from energy
Capacity programs pay mostly for standing by. Rising GWh delivered means sites are being called more often, which changes the cost of participating.
Generator-owned aggregators
NRG’s ownership is a model other generators may follow, pairing demand-side capacity with a supply portfolio.
Method and caveats
Figures are company-reported or from regulatory filings and trade press, checked October 15, 2026. Site counts differ between releases (21,000 to 23,000) depending on whether NRG-managed sites are included.