The Volt is sold in Europe as the Opel Ampera and is compatible with their electrical system.
Four days after the use of an ancient DC-3, along with other security requests, was being denied, on May 7, 2012, the State Department authorized the U.S. Embassy in Vienna to purchase a $108,000 electric-vehicle charging station for the embassy motor pool's new Chevrolet Volts.
(emphasis mine)
Well, it’s like Dad always said, “It ain’t the Volts, it’s the Amperas that hurt you.”