As last week’s intense heat wave strained power grids across the US, concerns grew that the growing number of electric vehicles might worsen the situation. Instead, electric school buses equipped with vehicle-to-grid (V2G) technology played a crucial role in supporting the grid, providing much-needed electricity during peak demand.
Electric School Buses Feed Power Back to the Grid
According to the World Resources Institute’s Electric School Bus Initiative, approximately 230 electric school buses are now participating in fully deployed V2G projects. These buses can collectively supply 8 MWh of power to the grid at any given time—enough to power about 1,600 typical US homes for up to four hours.
California leads the nation in adopting V2G school bus technology. The Oakland Unified School District operates a fleet of 74 electric school buses, which contribute an estimated 2.1 GWh of clean energy back into the state’s grid annually.
Scaling Up: The Potential of V2G Technology
While current deployments are significant, they represent only a fraction of what is possible. With roughly 6,700 electric school buses already in service across the US, expanding V2G participation could provide well over 100 MWh of flexible, off-peak energy during periods of high demand.
This flexibility not only helps stabilize the grid but can also reduce the need for utilities to purchase expensive peak power, potentially lowering electricity costs for consumers.
Emergency Support and Community Benefits
Beyond grid stabilization, electric school buses offer critical support during emergencies. Angie White-Banda, Transportation supervisor for Florida’s Glades County School District, highlighted that these buses can serve as mobile power sources. In the event of a hurricane or power outage, buses can be brought to community centers, allowing residents to charge devices and access air conditioning.
San Francisco’s Unified School District is preparing to launch a new electric school bus project next month, with a fleet of 104 buses expected to return about 3 GWh of energy annually during peak hours. The project is set to expand to more than 238 electric buses by 2028.
Competitor Comparison
While electric school buses are leading the way in V2G deployments, other forms of energy storage and distributed generation—such as home batteries and stationary grid storage—are also being used to support grid reliability. However, the scale and mobility of school bus fleets give them a unique advantage in providing flexible, location-based support.
Historical Context
The adoption of electric vehicles has accelerated in recent years, with global sales reaching 17.1 million units in 2024, a 25% increase year-over-year. This growth trend has continued into 2026, with a 20% year-over-year increase, reflecting the expanding role of EVs in both transportation and energy systems.
Why this matters
The ability of electric school buses to feed power back into the grid during periods of high demand demonstrates the broader potential of EVs as distributed energy resources. As more school districts and utilities adopt V2G technology, the grid becomes more resilient and better equipped to handle extreme weather events.
This development also highlights the dual value of electric vehicles—not only as a means of transportation but as a flexible tool for energy management and community support.
What this means for buyers
For school districts and fleet operators, investing in electric school buses with V2G capability can provide both operational savings and new revenue opportunities by participating in grid support programs. For consumers, the continued expansion of V2G technology may lead to more stable electricity prices and improved grid reliability, especially during extreme weather.
As more regions adopt these solutions, buyers should look for vehicles and infrastructure that support bidirectional charging and consider the long-term benefits of integrating EVs into local energy systems.
Key Specs
- Number of V2G Electric School Buses (Current Projects): 230
- Power Supplied to Grid (Current Projects): 8 MWh (enough for ~1,600 US homes for up to 4 hours)
- Oakland Unified School District Fleet: 74 buses, 2.1 GWh annually
- San Francisco Unified School District Fleet (2026): 104 buses, 3 GWh annually
- Total Electric School Buses in US: 6,700
- San Francisco Fleet Target (2028): 238 buses
Source
Images sourced from: electrek.co
