Tesla has announced new increased Supercharger rates, raising the price per kilowatt-hour at its centers.

In a report by Electrek, Tesla issued the following statement in response to the move.

“We occasionally adjust rates to reflect current local electricity and usage. The overriding principle is that Supercharging will always remain significantly cheaper than gasoline, as we only aim to recover a portion of our costs while setting up a fair system for everyone. This will never be a profit center for Tesla.”

Price increases have risen across the entire U.S. with rates ranging between 20 to 40 percent, with the number reaching as high as 100 percent, such as Oregon’s $0.12 to $0.24 rate per kWh. Use of Supercharger stations remains less expensive than gasoline fill-ups, capable of refueling a vehicle to 80-percent capacity within 30 minutes.

Some states, such as Alabama, are exempt from charging by kWh due to regulations, charging on a per-minute fee basis where rates are assessed based on charging speed.

These rates increases are expected to contribute towards building additional Supercharger networks and increasing capacity. At the moment, all current Model S and X owners have lifetime free charging with Model 3 owners responsible for a small fee.

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Tesla’s Supercharger network has steadily expanded over the last year, crossing over into urban areas with a stated 2017 goal of doubling network size, with a large number of sites capable of fitting 20-plus vehicles. This expansion would also boost the number of Destination Charging stations featuring slower refueling rates. As of this writing, there are more than 8,500 Supercharger stations across the globe.

For a complete list of all states and additional Supercharger program details, visit Tesla’s Supercharging Support page.