School Bus Fleet Electrification Planning

Synopsis

PNNL examined the transition of 65 school buses from internal combustion to electric. Load and charging needs were estimated over a 20-year horizon. The benefits of smart charging and stationary storage hybridization were also assessed. Lastly, PNNL studied the economic impacts of using school bus fleets for grid services.

• Smart charging of the studied fleet is estimated to save the school district close to $2 million in electricity bills and transmission upgrades.
• Battery storage may be beneficial to schools and utilities when benefits are broadly considered.
• Bus fleets are well-positioned to be used as a vehicle-to-grid resource for a variety of grid services. Fleet batteries are best suited for ancillary services. This could be a potential win-win for schools and utilities.