Tesla Tops, BGE Flops: A Data-Driven Look at DC Fast Charger Usage Near Columbia Maryland

Fast Charger Showdown: Local Usage Trends in 2023

Here in Columbia, Maryland, I’ve been closely monitoring the usage patterns of nearby electric vehicle fast chargers since 2020. This includes a mix of CCS/CHAdeMO stations from EVgo, Electrify America, Baltimore Gas and Electric (BGE), and Tesla Superchargers. My approach is simple: I track the electricity consumption at each location by recording monthly meter readings and analyzing the data over time. The goal? To gain valuable insights into how fast charging infrastructure is being utilized in this region and identify trends in usage growth.

DCFC Throughput Chart

The chart above visualizes how much people utilized the fast chargers at four different locations throughout 2023. To understand this, I calculated the average daily usage per charger at each site. Here’s how I did it: I took the total electricity used each quarter, divided it by the number of days in the quarter, and then divided that daily usage by the number of fast charger dispensers at the site.

While all four locations saw an increase in usage compared to earlier quarters, there are some significant differences. The utilization rates and growth rates vary greatly between stations. Notably, in the last quarter of 2023, each Tesla Supercharger port dispensed, on average, more than three times the amount of electricity daily compared to the EVgo chargers. Interestingly, the BGE chargers, despite being less than a mile away from the Electrify America station, have a significantly lower utilization rate.

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Point 50 EVgo Charging Station – Fairfax, VA

EVgo charger Fairfax, VA

Point 50 EVgo Charging Station in Fairfax, Virginia. Located at 10334 Fairfax Blvd. This 200 kW DC fast charger station is in the northeast corner of the shopping center parking lot. The Point 50 retail center is located off Route 50.

Location
Address: 10334 Fairfax Blvd., Fairfax, Virginia 22030
County: Fairfax
Facility Type: Shopping Center
Coordinates: 38.860855, -77.303957
Directions: In parking area for the Point 50 retail shopping area.
Map Link: OpenStreetMap

Technical
Connector Type: CCS and CHAdeMO
Power & Qty: 200 kW, x2
Total Site Power: 200 kW

Access
Network: EVgo
Availability: Public
Hours: 24 hours daily
Pricing: TOU $0.34-$0.45/kWh +$0.99 session fee

Amenities
Restroom: Compass Coffee
Food: Amazon Fresh
WiFi: Compass Coffee

Signage
Signs: EVgo branded blue and white signs. EVgo FAST CHARGING ONLY, VEHICLES MUST BE CHARGING, VACATE STALL WHEN COMPLETE
Marking: White text, EV CHARGING ONLY
Enforceable: No, not official signs.

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EVgo Blames AT&T for Outage Sunday Evening

EVgo Outage

Charging Sites Completely Down for Hours

EVgo experienced a widespread network outage Sunday evening as many EV drivers were returning from their weekend travels.

Around 6:30 PM July 17th, I noticed an unusual number of chargers on the EVgo network were reporting as offline and unavailable on the EVgo mobile app. At least 16 sites in Virginia were completely down. See the map above for the locations in Virginia that reported no working chargers.

Around 8:00 PM an electric vehicle driver tweeted that the last six EVgo chargers he tried did not work.

AT&T is experiencing communications issues that is impacting our network, please refer to the EVgo app for current charger status and Plugshare for alternative charging options.

evgo
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