Imagine going to gas stations to fill up your car and finding that two out of ten times, the pumps aren’t working. 

That’s what electric vehicle owners are facing, according to a study by the Harvard Business School and the Georgia Institute of Technology. 

The study, which was based on an analysis of 1 million EV charging stations consumer reviews, also found that EV drivers are plagued with opaque pricing models, making it difficult to know the bill before charging.

The distribution of stations is also creating dissatisfaction among drivers. Most of them are located in large population centers and wealthy communities, but much more scarce in rural areas and smaller cities. Commercial drivers, according to the study, can’t find enough public EV charging stations to reliably charge their vehicles.