Drivers of electric vehicles in Knoxville will soon have to pay for their power at more than half of the city's EV charging stations.

The City of Knoxville has signed an agreement with CarCharging Group Inc. to keep 14 of the city's 24 EV stations operational. A subsidy provided by the Department of Energy allowed those charging stations to be free of charge since they were installed, but starting on July 1, Blink will charge $1 per hour for members and $2 for guests.

Those affected EV stations are located at Caswell Park, Ijams Nature Center, Sequoyah Park, State Street Garage, Victor Ashe Park, West Hills Park and the Jackson Avenue parking lot.

Find electric car charging stations here

"We are excited to work with CarCharging to keep these Blink electric vehicle charging stations up and running at City parking facilities," said Erin Gill, Director of the City's Office of Sustainability. "These stations are critical to supporting the use of vehicles that consume less energy and produce fewer emissions."

The City of Knoxville's Blink Level II EV charging stations quickly recharge an electric vehicle's battery. EV drivers can easily request Blink's InCard at to initiate use and payment at these locations.

The Oak Ridge National Laboratory (ORNL) operates the 10 remaining EV stations in Knoxville through September 30, and those will continue to be free of charge. They are located at the Knoxville Coliseum Auditorium and the Market Square Garage.

ORNL installed these 10 stations as part of a statewide DOE research project to examine the interaction between solar energy, battery storage and EVSE usage.