The state Department of Transportation is installing electric vehicle charging stations at six service plazas along the Massachusetts Turnpike.

Drivers will be able to power up at the fast-charging 50-kilowatt charging stations at the westbound Framingham and eastbound Natick plazas by early fall.

Charging stations at the eastbound and westbound Charlton plazas are expected to be operational by late fall, while charging stations at the westbound Blandford plaza and at either the eastbound Blandford plaza or eastbound Lee plaza should be available by the end of the year.

Agency spokeswoman Jacquelyn Goddard tells the Boston Herald that the stations can charge a vehicle to 80 percent power in 10 minutes and to 100 percent power in 20 minutes.

Project costs include about $30,000 in equipment expenses per charging station.