Having recently purchased a 2024 62kWh (200 mile range) Ariya Engage, I am interested to know the availability of Tesla superchargers along routes I frequent, namely 93 North into NH, 95N into Maine, and 3S/6 into the Cape. Surprisingly there is no API to extract historical data. However one can monitor in real time availability using the Tesla app. I would be interestd to know are there particular days/times when demand is high? How is this affected by weather? Certain stations that are always available or always have wait times?
I gathered the list of relevant charging stations and monitored availability at 2,4,7PM on Fri, Sat, Sun from May through 4th of July weekend 2025. The number at the top of each panel is the weekend date. A Thursday or Monday might be included for long weekends.
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Results
Data collection was designed to look for trends e.g. “The Tilton NH chargers are always busy on Fridays at 4PM” but I found that:
- In general high availability across all routes/stations
- Weather had little impact (this was not plotted)
- In the few instances where there were wait times, neighboring stations had plenty of availability i.e. not a global surge in demand but a local stochastic event.
- Some stations were always busy: Manchester NH, Burlington MA (at the mall)
- Stations proximal to Boston have (in general) 12 stalls while distal stations have 8 stalls.
Notes
- The Plymouth MA station came on line in time for July 4 weekend but was unavailable for monitoring during most of this study
- Non-Tesla vehicles only have access to v3,4 stations, not v1 or v2 which are not compatible with the app non-Tesla users use to activate charging. Supposely across the country >80% of stations are v3 or 4, probably 90% in New England, but some of the most useful (to me) are unavailable: Sagamore Bridge MA, Center Harbor NH, and Lincoln NH (Riverwalk parking lot)
- Many non-Tesla users report difficulties with reaching the charging port of their cars due to relatively short cables on the chargers. Ashland NH has a charger positioned sideways at the end stall which made charging very easy.
Conclusions
- Range anxiety is a historical phenomenon no longer applicable in todays world with universal access to Tesla superchargers. Thank you Elon.
- At this time, summer 2025, charger availability is not an issue. I will predict that with increasing EV adoption supercharger availability will continue to be a non-issue due to the competing trends of increasing EV range and increasing availability of destination chargers. Already we are seeing Winnipesaukee rentals advertising EV charging.
- I can sell my gasoline car and depend on the Ariya for long distance driving.