Level 2 Usage Study Webinar

This webinar discussed the Level 2 Charging Station Usage Study methodology and results. In 2015, the NC PEV Taskforce completed a statewide assessment of public electric vehicle charging station usage and management. The study focused specifically on Level 2 charging stations, with the objectives to develop public charging station usage benchmarks for North Carolina, identify factors affecting station usage, and highlight best practices for charging station management. To download the full study, visit

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Questions & Answers
1. Where was the usage data sourced? The data was individually gathered from the sites.
2. What is the most important finding the study elucidated? We think the most important part was setting a benchmark for further studies. It was also very interesting to see why stations were being used more or less.
3. What type of amperes are most of the Level 2 charging stations? Most Level 2 public stations are rated at 30 amps of electric current, which requires a circuit rated for 40 amps.
4. Level 1 charging wasn’t considered? Why not? Level 1 is becoming a common type of charging seen around the state, however the usage data is hard to collect, so we did not include it in the study.
5. You mentioned that a fee for plug-in reduced usage. Do you have any information on determining optimal fee. Information on optimal fees is limited. Almost all of the public stations in North Carolina that assess fees for Level 2 charging are part of the ChargePoint network, which allows the owner to determine the fee. Based on information from PlugShare and our Owner Survey, fees at these sites ranged from $1 to $2 per hour. At some sites the cost of charging was $1.25 for the first hour and $2 for every hour of charging thereafter. These fees are similar to those seen in other areas of the United States I would refer those looking on for information on fees to the August 2015 “Paying for Juice” webinar hosted by the PEVC. The presentations by PEVC and Chargepoint were especially informative. Research from the EV Project is also available, but the market may be evolving too quickly for that to be useful. I am not aware of many other resources on fees for charging.
6. It looked like on-street parking was the highest use of EV charging. I have heard there are some concerns about on-street parking EVSE….are the owners of those on-street spaces generally satisfied with them? Are you expecting this to lead to more on-street parking EVSE? This study did not look specifically at that, but we have noticed that taking away on-street parking can be difficult. However, on street charging stations are usually highly used because of their visibility.
7. Did you collect any data from owners of non-networked chargers? Yes, we collected a lot of data from non-networked chargers and networked chargers.
8. What’s the best place to go for grants or public funding mechanisms? There is currently funding available through the CFAT program. Here is a link for more information
9. The DOE’s workplace charging challenge survey results show that employees that are offered EV charging are 20x more likely to drive an EV. Wouldn’t workplace be a better use of funding rather than public? You are correct that the availability of workplace charging greatly increases the likelihood of someone purchasing an EV. For this project, however, our funder specifically wanted to look at public charging to better understand how the stations are being used and managed. The goals of the study were to develop benchmarks for public charging in North Carolina, identify factors affecting usage, profile station management and highlight best practices. The only study completed similar to this one was through the national EV Project, which did not include North Carolina. This study allowed us to better understand public charging in our state. Also, from 2012 to 2014, we did conduct a workplace charging usage study. For more information on that study, please visit