Faculty Publications

Cost Analysis Of Dcfc Fast Charging Station Power Rates For Workplace Charging

Document Type



Demand charge, electrified fleets, EVSE, plug-in electric vehicles, time-of-use tariff, workplace charging

Journal/Book/Conference Title

2022 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2022


DC fast charging (DCFC) station becomes prominent thanks to offering faster charging service. However, they increase the peak demand, hence, the demand charge for industrial and commercial customers increases. This study analyses cost behaviors of various DCFC power rates (i.e., 50 kW, 150 kW, 350 kW) at workplaces under demand metered and EV specific TOU rates for various EV utilization. An optimal cost model with proposed interrupted charging profile is presented that minimizes the daily levelized total cost of DCFC station at workplaces. It is shown that DCFC cost behaviors differ from the utility rate and EV utilization. From the grid perspective, the EV specific rate increases the peak demand considerably as compared to the demand metered rate. This is due to the nature of the TOU rate design. However, this impact can be minimized with solar generation that coincides with the peak demand hours.


Department of Applied Engineering and Technical Management

Original Publication Date


DOI of published version