Grid Edge and DER

rooftop solar · batteries · EVs · virtual power plants

Virtual power plants reached 37.5 GW in North America, close to the US fleet of utility batteries. Program caps, not hardware, limit how much of it counts.

North American virtual power plants reached 37.5 GW of flexible capacity in 2025, against about 45 GW of US utility-scale batteries and 24 GW of storage planned for 2026. VPP deployments grew 33% but capacity only 13.7%, held back by utility program caps and accreditation rules. The largest single US program aggregates 16.8 GW of thermostats and home batteries. FLEXIBLE CAPACITY, GW VPP capacity, N. America 37.5 GW US utility batteries ~45 GW US storage planned, 2026 24 GW GROWTH, 2024 TO 2025 VPP deployments +33% VPP capacity +13.7% More programs, slower capacity: utility caps andaccreditation rules limit how much counts. 16.8 GWLargest single US program: thermostats (Renew Home)plus home batteries (Tesla, Sunrun)
VPP capacity
37.5 GW
Deployments
+33%
Capacity growth
+13.7%
Largest program
16.8 GW
Hub
Energy

Finding

Homes and businesses already hold a power plant's worth of flexible capacity; the rules decide how much of it counts

Virtual power plants - aggregated home batteries, thermostats, EV chargers, water heaters and commercial loads - reached 37.5 GW in North America in 2025 (Wood Mackenzie), close to the 45 GW of utility-scale batteries the US had built. Deployments grew 33% in a year, but capacity grew only 13.7%.

The gap is regulatory, not technical. Utility program caps, capacity accreditation rules and limited wholesale market access keep enrolled devices from counting at full value; most aggregators say FERC Order 2222 has done little to open markets. Texas and the PJM region, where data centers are adding the most load, also have the largest VPP contracts, because flexible demand is the fastest capacity a utility can add.

The edge also changes the distribution grid. Rooftop solar, home batteries and EV chargers push power both ways on feeders built for one-way flow, so utilities need smart inverters, DER management systems and, increasingly, solid-state equipment at the feeder.

The assets

What sits at the grid edge

Distributed energy resources at the grid edge
AssetRoleNotes
Rooftop and commercial solarGeneration behind the meterSmart inverters set voltage and ride-through behavior
Home and commercial batteriesPeak shaving, backup, VPP dispatchLargest share of dispatchable VPP capacity
EV chargers and V2XFlexible load; bidirectional where supportedManaged charging today; V2G still small
Thermostats and water heatersShift load minutes to hoursCheapest flexible capacity per kW
Commercial and industrial loadsDemand response contractsData centers now offering curtailment
MicrogridsIsland and run a site on its ownSee Microgrids

The control stack

From device to market

Grid edge control stack
LayerWhat it doesStandards and players
DeviceInverters, batteries, chargers, metersIEEE 1547-2018 for interconnection; UL 1741 SB
CommunicationDevice-to-aggregator protocolsIEEE 2030.5, OpenADR, OCPP for chargers
AggregationVPP platforms bundle devices into dispatchable blocksTesla, Sunrun, Renew Home, Uplight, CPower, EnergyHub
Utility controlDERMS and ADMS see and steer the feederSchneider, GE Vernova, Oracle, Siemens
MarketWholesale and utility programs pay for capacityFERC Order 2222; ERCOT ADER; California DSGS

Sources

Sources and scope

Scope
Distributed energy resources, virtual power plants and grid-edge control
Sources
Wood Mackenzie 2025 North America VPP Market Report; EIA battery capacity; pv magazine on the 16.8 GW program
Updated
October 2026