Utilization, Uptime & Profit/Loss
The public charging station at the MARC Train Station in Frederick, Maryland is owned and operated by Potomac Edison under a pilot program approved by the Maryland Public Service Commission. There is one dual-port Level 2 unit on the ChargePoint network located at the edge of the train station parking lot.
Note: This is part of a series of reports of operational and financial performance data for Maryland utility-owned EV charging stations derived from public data.
Evidence of Key Gaps
The charts below display daily charging session activity for each of the Level 2 ports at the MARC Train Station for calendar year 2025. Each trace represents a single connector port, and at a well-utilized site like this one a healthy port should produce a near-continuous heartbeat of daily sessions throughout the year. The green spikes reflect days with at least one recorded session, the flatlines indicate three or more consecutive days with no recorded activity.
A data quality issue is worth noting before reading these charts. Analysis of the session records reveals 26 instances where two sessions under Port 1 overlap in time, in some cases by several hours. Because a single physical port cannot serve two vehicles simultaneously, this strongly suggests that sessions from two separate ports were recorded under the same Port 1 identifier. This appears to be concentrated in the second quarter and may reflect a clerical error in how session data was submitted. The practical effect is visible in the traces: Port 1 shows an unusually dense signal during that period while Port 2 shows a flatline, suggesting Port 2 session data was inadvertently attributed to Port 1. The underlying port-level activity for that period cannot be determined from the data as reported.
The percentage figures above each segment are the monthly uptimes reported to the Maryland Public Service Commission under the Electric Vehicle Charging Reliability Act (HB 834) of 2023, which requires 97% annual uptime per port. Readers may find it useful to compare those reported figures against the session traces directly below them, particularly in months where flatlines appear alongside high reported uptime.
Site Overview
- Address: 155 B and O Ave, Frederick, MD
- Level 2 Ports: 2 (ChargePoint)
- Opened Date: April 3, 2020
- Installation Cost: $17,960.66
Financial
Revenue comes from EV drivers who pay around $0.21 per kWh for Level 2 charging. That rate is regulated by the PSC and may change slightly within a narrow range that was approved by the PSC. The main operating expenses are the monthly electricity bills. $0.267 is the blended cost/kWh (Total cost for the year of electricity ÷ total kWh consumed). Other operational expenses are preventive and corrective maintenance plus $560 of yearly networking fees.
Utilization
- 9,191 kWh Total Electricity
- Average Session Duration: 196 minutes
- Average Energy Dispensed per Session: 20 kWh
- Average Charging Sessions per Day: 1.25
Uptime
Reported uptime for all ports are presented in the table below.
Notes
Notes and disclaimers: The presentation of this data is unofficial and best efforts are made to aggregate and portray them accurately. Consult the source reports for the official record. Some values are rounded to the nearest whole number. Where necessary, figures from Quarterly and Semi-Annual Reports have been combined for completeness.
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