Virtual Power Plants Offer Savings Via Smart Home Devices

Utility and energy companies are increasingly treating household devices like thermostats, electric vehicles, home batteries, and HVAC systems as components of virtual power plants (VPPs). A VPP is defined as a collection of these household devices that a utility can control, typically to reduce electricity consumption during peak demand hours. For instance, a utility might adjust a participant's thermostat settings or delay or slow down electric vehicle charging when overall electricity demand is high. In return for this participation, VPP programs offer consumers incentives such as discounts on their energy bills and, in some cases, an upfront signing bonus. Seth Frader-Thompson, CEO and cofounder of EnergyHub, a software company that facilitates VPP programs for utility companies, stated that smart thermostat programs might provide an initial bonus ranging from approximately $50 to $150, with additional annual savings of about $25 to $50. For participants with home batteries and electric vehicles, the potential annual savings could be in the hundreds or even thousands of dollars. While the amount of power throttled in an individual home is relatively small, Frader-Thompson emphasized the significant collective impact when aggregated across hundreds of thousands or millions of households, comparing it to the equivalent of "firing up a power plant." As of 2023, the United States alone hosted over 500 VPP programs, a number that has continued to grow, partly due to investments from major technology companies like Google, which are exploring VPPs to help power their data centers. Last year, an estimated 4 million households equipped with smart thermostats were enrolled in VPP programs. However, the VPP approach is still in its early stages, and some programs may still be refining their operations, according to Severin Borenstein, faculty director of UC Berkeley’s Energy Institute at Haas and a member of the board of governors for the California Independent System Operator, which oversees the majority of California's electricity grid. The concept of VPPs leverages distributed energy resources, turning individual homes into active participants in grid management. This distributed approach aims to enhance grid stability, reduce reliance on fossil fuel peaker plants that are often activated during high demand, and potentially defer costly infrastructure upgrades. Consumers interested in joining a VPP program typically need to ensure their smart home devices are compatible with the program's requirements and agree to the terms of service, which outline the conditions under which their devices can be controlled. The decision to join a VPP involves weighing the potential financial benefits against the perceived impact on personal comfort and convenience, as device adjustments are made automatically based on grid conditions. The growth of VPPs is also influenced by regulatory frameworks and incentives designed to promote renewable energy integration and demand-side management.