This is a competitive grant solicitation. The California Energy Commission’s (CEC’s) Clean Transportation Program (formerly known as the Alternative and Renewable Fuel and Vehicle Technology Program) announces the availability of up to $20.0 million dollars in grant funds for projects that will support the deployment of fueling infrastructure for medium- and heavy-duty (MD/HD) zero-emission transit bus fleets. The purpose of this solicitation is to fund the electric vehicle (EV) charging or hydrogen refueling infrastructure needed to support the large-scale conversion of transit bus fleets to zero-emission vehicles (ZEVs) at multiple transit agencies serving diverse geographic regions and populations.