Con Edison has begun using the batteries on five Lion Electric electric school buses to provide power to its customers, marking the first time in New York State that electricity has flowed from buses into a utility’s grid.
Con Edison and its partners have begun sending power from the bus batteries into its grid, a milestone in a vehicle-to-grid (V2G) demonstration project Con Edison began in 2018. The five buses can each discharge 10 kilowatts. For the five buses, that’s 50 kilowatts or 50,000 watts.
That is a tiny amount of power for a utility grid with the capacity to reliably serve millions of homes and businesses in Westchester County and New York City. But the goal of the project is to explore the technological and economic potential of using e-school buses on a wider scale to improve air quality and grid reliability.
There are approximately 1,000 school buses operating in Westchester and 8,000 in New York City that could make a significant difference if converted to electric.
We think electric school buses may provide an opportunity to achieve two of our company’s goals, which are reducing carbon emissions and maintaining our industry-leading reliability. We are innovating to help our state and region achieve a clean energy future in which electric vehicles will have a big role.—Brian Ross, Con Edison’s manager for the project
The White Plains school district put the buses on the road for the 2018-2019 school year and has found them to be reliable transportation. The company and its partners have since developed solutions to technical challenges, such as coordinating communication between the buses, the chargers and the batteries.
The charging and discharging takes place at a depot in North White Plains. The buses plug into a charger when the demand for power is low. The chargers reverse the flow of power into the grid at times when the buses are not transporting children.
The buses are manufactured by Lion Electric in North America with vehicle-to-grid (V2G) technology from Nuvve, and operated for the school district by National Express. In November, Nuuve and Lion Electric announced a collaboration on launching V2G technology as a standard feature in the electric school buses. (Earlier post.)
Con Edison contracted with First Priority Group to help develop and manage the project.
National Express pays the energy costs during the school year. Con Edison, the New York State Energy Research and Development Authority and National Express contributed to paying for the buses. Con Edison and National Express paid for the chargers.
The upfront cost of electric school buses is higher than diesel buses. But using electric school buses for vehicle-to-grid purposes could make them more attractive to school districts, the communities they serve, and the bus operators that provide the service.
School schedules match up well with the power needs of Con Edison’s 3.5 million customers. School buses are generally idle during the summer, which is when utility customers’ need for power rises due to air conditioning. Discharging power from the buses into the grid at these times of high demand would take stress off Con Edison electric-distribution equipment.
Among the questions the project will answer is whether the frequent charging and discharging will speed the degradation of the batteries.
Con Edison is a subsidiary of Consolidated Edison, Inc., one of the US’ largest investor-owned energy companies, with approximately $13 billion in annual revenues and $60 billion in assets. The utility provides electric, gas and steam service to more than three million customers in New York City and Westchester County, New York.