Tesla’s Supercharger network is by far the most dominant DC fast charging network in the US, but it recently passed a key milestone of having an average of more than 10 DC fast chargers (ports) per charging location.

At 10.1 ports per Supercharger location, Tesla averages 2.4 times as many ports per location than number two DCFC network Electrify America, which has an average of 4.2 ports at each US location. EVgo is a distant third with an average of 1.9 ports per location.

Tesla’s dominance is mainly driven by demand as since the launch of the Model 3, the company’s models have accounted for about 3 out of 4 of every new full battery electric vehicle (BEV) sold in the US. With the by far the most EVs on the roads in the US and continued strong sales, the company has had to continue to expand its fast charging network rapidly to keep up with charging demand and minimize charging wait times.

And because the Supercharger network already has a strong location footprint — especially in high-EV sales or sales share markets such as California, Washington, Arizona, Illinois, Florida, New York, Texas and Virginia — expanding the number of chargers per location is a key strategy for the company.

However, when you look at the ratio of Tesla Supercharger ports to the number of locations, the ratio varies from a high of 14.8 to 1 in California to a low of 4.0 to 1 in Alaska. And only five other states beyond California are at 10.0 or above: Arizona, Georgia, Illinois, Washington, and the District of Columbia. On the low end are less populous and low EV adoption states including Alaska, Montana, Wyoming, South Dakota, and Oklahoma.