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Electric school buses are used to support the fragile US power grids in summer heat

The batteries in over 200 electric school buses in the United States are helping people to find relief when temperatures soar. When temperatures soar, you can find relief.

Yellow electric school buses from California to North Carolina are returning power to the grid, relieving some of the strain during summer heatwaves. More than a hundred more buses are expected to be online.

Power plants are dwarfed in terms of the energy stored by school buses and other electrical vehicles. But attempts to use their batteries to send power to electrical systems (known as Vehicle-to-Grid, or V2G) show how EVs can strengthen strained power grids.

According to the World Resources Institute (WRI) Electric School Bus Initiative, fully deployed V2G project involving approximately 230 of the country's 6,700 electric busses can now supply up to 8 megawatts-hours at any given time. PJM, which is the largest U.S.'regional grid,' will require more than 160,000 Megawatts to meet the peak demand of 67 million Americans this week. This week, the U.S. has experienced record-breaking heat.

It's still very early. Steve Letendre is a senior advisor at the Vehicle Grid Integration Council, a trade association.

Some electric school buses have batteries that are larger than 200 kilowatt hours. They can recharge when the demand is low, and then send electricity back to the utility. During the summer months, they are usually unused.

WRI reported that at least 31 utilities in 21 U.S. States are involved with V2G projects.

WRI data indicated that the number of electric buses in use should double over the next few years to 14,625, which is 3% of all fleets. Many of them will be V2G enabled.

To make a significant difference, the capacity of V2G electric bus projects must grow exponentially. ICF, a consulting firm, forecasts that the U.S. grid will add 445,000 megawatts by 2030. This is partly due to the boom in data centers.

TECHNOLOGY FACE MULTIPLE BARRIERS

V2G projects are faced with a number of obstacles, including upfront costs and the lack of a universal V2G standard. Standards and regulatory frameworks are still years away. Owners and operators of electric vehicles are concerned that the repeated charging and discharge of a vehicle's battery may accelerate its degradation and that V2G use could invalidate a warranty.

Electric buses emit no tailpipe pollutants, but critics who oppose vehicle electrification or government/public investments in alternative energy projects claim that they could tax the grid. Many schools use solar energy to charge their devices.

GOLDEN STATE BUS INITIATIVE

California is leading the U.S. when it comes to developing and adopting V2G technology for school buses.

The largest project in the country is the Oakland Unified Schools District where Pacific Gas & Electric, and transit provider Zum, operate a fleet of 74 buses that generate 2.1 gigawatt hours of electricity per year.

Next month, a separate Zum project in collaboration with the San Francisco Unified Schools District will?launch. The project is expected to?surpass the Oakland project with a fleet of 104 starting buses that return about 3 gigawatt hours of energy per year during peak times. In 2027-2028, the fleet will double to 238 buses. California requires that all electric school buses funded by state programs have Vehicle-to Grid capability. The state is also funding V2G infrastructure projects and has the largest utilities in California -- PG&E, Southern?California Edison and others -- as partners.

The Branford Public School district in Connecticut will be using 46 electric buses that are V2G capable by August.

Cherokee Boys Club in North Carolina will operate 21 electric buses for Cherokee Central Schools, which are tribally run. Duke Energy has funded a V2G test program. Donnie Owle, the service manager at Cherokee Boys Club is working on an initiative to use?buses that are used as emergency shelters in schools as generators.

Daniel Thomas, the director of administrative services for Glades County Schools in South Florida, says that he does not have any funding to support V2G, but plans to cool 13 Blue Bird electric busses when the next storm hits.

Thomas: "We hope that it will never come, but Florida is Florida."

(source: Reuters)