Tesla Supercharger Charger Audit – October 4, 2024

Tesla Supercharger Port Availability (10-04-2024)

• Maryland Superchargers: 99.1%
• Goal: 97% Uptime

Maryland Superchargers: Charger Audit Results

This virtual charger audit of Maryland’s Tesla Superchargers is intended to complement my ongoing assessments of utility-owned public charging stations. The aim is to compile independent data points to evaluate charger reliability against the state’s 97% uptime target.

On October 4, 2024, I used the Tesla app to check the availability of all 531 Tesla Supercharger stalls across 59 active locations in Maryland. Each Supercharger location in Maryland has between four and 16 stalls.

Overall Port Availability on 10-04-2024: 99.1%

The audit found that 5 out of 531 Supercharger stalls (0.9%) were reported as out of order in the Tesla app, resulting in an overall availability of 99.1%.

This level of availability aligns with the consistently high reliability of Tesla Supercharger ports that I documented during the summer of 2023. During those months, we drove to hundreds of Supercharger locations across the United States. Often, we visited more than a dozen sites in a single day without encountering any problems and being able to charge on the first attempt.

Methodology

The goal of those charger audits was to assess the operational status of Superchargers at both the site and individual stall levels. For each Supercharger location, I reviewed the status displayed in the Tesla mobile app, noting any temporary closures or reported non-functional stalls. Upon arrival at a site, we randomly selected a stall, plugged in, and noted whether it charged successfully on the first attempt.

Testing every stall was impractical, so I closely observed stall conditions and driver behavior. If I saw a driver switch stalls, I flagged the initial stall as potentially problematic. I also noted the number of occupied stalls, assuming those were functional. This hands-on approach provided a comprehensive view of Supercharger reliability across different geographic areas in the United States.

Looking Ahead

I will continue to track EV charger port availability trends and monitor downtime for charging stations in Maryland. As more data is collected, it will provide a clearer picture of whether Maryland’s public charging networks are meeting reliability standards and supporting the state’s goals for EV adoption.

Stay tuned for further updates on charger reliability. Be sure to follow @PlugInSites on X and subscribe below for email updates on future charger audits and other EV charging news.