Tesla Supercharger Port Availability (09-27-2024)
- Maryland Superchargers: 99.2%
- Goal: 97% Uptime
Maryland Superchargers: Charger Audit Results
This Tesla charger audit is intended to complement my ongoing assessments of utility-owned public charging stations in Maryland. The aim is to compile independent data points to evaluate charger reliability against the state’s 97% uptime target.
On September 27, 2024, I conducted a virtual audit of all 531 Tesla Supercharger stalls across 59 active locations in Maryland, with each location containing between four and 16 stalls.
Overall Port Availability on 09-27-2024: 99.2%
The audit found that four out of 531 Supercharger stalls (0.8%) were reported as out of order in the Tesla app, resulting in an overall availability of 99.2%.
| Location | Stall | Status |
| Elkridge, MD | 1D | Out of Order |
| Brandywine, MD | 1A | Out of Order |
| Easton, MD – Ocean Gateway | 1A | Out of Order |
| Bethesda, MD – Elm Street | 3C | Out of Order |
This level of availability aligns with the consistently high reliability of Tesla Supercharger ports that I documented during the summer of 2023. Over several months, I conducted on-the-ground assessments at hundreds of Supercharger locations across the United States, evaluating thousands of ports. Often, we visited more than a dozen sites in a single day without encountering any reported or observed outages.
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 audit, 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, initiated a charge, and recorded 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. Stay tuned for further updates on charger reliability.
