The Southwest Research Institute has developed a new system that's designed primarily for businesses with large fleets of heavy-duty electric vehicles. When the electricity grid dips below a certain operating frequency, vehicle charging is suspended. Researcher Sean Mitchum says energy is then returned from the batteries back to the electric grid.
"There's a bunch of energy stored in the vehicle, but the vehicles don't currently need that energy. And that's part of what this pilot is about, is there a way we can utilize that and still ensure that when the vehicles are needed that they're fully charged and ready to go."
Mitchum says the vehicle-to-grid aggregation system isn't really designed for individual electric car owners. That's because there's only a small amount of energy involved. But with multiple vehicles there's much more stored energy, and returning it to the grid could offset the cost of purchasing an electric fleet.
"We expect to see that there will be some incentive, economic incentive, to do this and especially when you have collections of fleets together that are all able to aggregate and bid into the market as a combined entity."
The system is the first-of-its-kind to be approved by ERCOT, the operators of the state's electric grid.