Earlier this month at GM Empower, we shared a simple idea that unlocks a big opportunity for America’s energy resilience: the same electric vehicle batteries that can help back up a home’s power can also help support the grid. GM announced progress that brings that vision closer to reality, including vehicle-to-grid capability for existing GM Energy vehicle-to-home customers through a firmware update, plus work with DTE Energy in Michigan and a long-term vision with PG&E in Northern California.
Now, a new E3 study on vehicle-grid integration, commissioned by GM, helps quantify why this matters. Founded in 1989, E3 is an energy consulting firm that provides strategic, unbiased guidance across utilities, regulators and policymakers. The study estimates that vehicle-grid integration could represent an approximately $7 billion U.S. market opportunity by 2030, with vehicle-to-grid potentially delivering 5 to 15 times more per-vehicle value than one-way managed charging (software that enables EVs to charge when energy costs are lowest) in many markets. The study also shows that most of the projected benefit comes from helping the grid stay reliable and avoid or delay infrastructure upgrades, not just from shifting energy use to cheaper times of day.
That matters because the case for V2G is no longer theoretical. GM already has more than 250,000 bidirectional-capable EVs on American roads today, and we have committed to this capability for all currently planned EVs going forward. The technology is here. The next step is creating the market structures and customer pathways that allow it to scale.
That is why we also created an open letter to utilities and regulators last month. In it, we called for collaboration across three practical fronts: better customer enrollment in utility programs, modernized tariffs and rate structures, and a simpler path to participation through streamlined interconnection and approval processes. The goal is straightforward: make it easier for customers to plug in, participate and – where utility programs are available – and be rewarded for the value their vehicles can provide.
The E3 study reinforces another important point: managed charging already delivers reliable customer savings in many markets, while broader V2G benefits depend heavily on program design, export compensation and clear regulatory frameworks. In other words, the opportunity is real, but unlocking it will take coordination.
GM is doing its part to move the technology forward. And for homeowners and utilities alike, V2G has the potential to deliver meaningful benefits. We hope this study helps move the broader conversation forward, too.