Embodiments of a methods and systems for charging one or more electric vehicles are described. A method can include: determining a collective power output aggregated from individual power outputs of each of the set of EVSEs; determining an adjusted power output of an EVSE unit of the set of EVSEs based upon the collective power output and an output constraint; and executing instructions for delivering the adjusted power output through the EVSE unit, for charging a vehicle of the set of vehicles. The set of vehicles can include fleet vehicles, and output constraints can be based upon demand response events.