Transmission logjams and AI load growth push data centers toward on-site solar, storage, and VPPs

The country's electricity demand is climbing fast, driven by AI data centers, manufacturing, and the shift to electric appliances and vehicles. But new power lines take years to build, sometimes up to 15 years, and the queue of projects waiting to connect to the grid has ballooned past 2,200 gigawatts, far more than the grid can currently carry. Utilities plan to spend $1.1 trillion on grid upgrades through 2029, but even faster regional projects take six to seven years.

Because of this lag, data center developers are increasingly building their own power on-site, roughly 56 gigawatts' worth of solar and battery projects nationwide, led by Texas, New Mexico, Pennsylvania, and Utah. Some grid operators are now fast-tracking connections for facilities that bring their own generation.

This shift is creating new interest in tapping home energy equipment to help balance the grid. Companies including Sunrun, Tesla, and Renew Home have announced plans for a 16-gigawatt "virtual power plant," which pools home batteries and smart devices across many houses to add power to the grid when needed. Google and Voltus have a similar deal to pull 100 megawatts from flexible home and business equipment. One industry study estimates that smart thermostats, batteries, and other flexible devices in homes could unlock up to 200 gigawatts of capacity nationwide.

For homeowners, this means a battery, smart thermostat, or solar-and-storage system may increasingly be worth something beyond backup power or bill savings: utilities and tech companies are actively looking to pay for access to that flexibility to help meet rising demand.