By September 1998, two VQCX_container flats had been modified to carry refrigerated containers by providing 415v electrical cabling, sockets and switchgear. The power was supplied from a PP class "Power Pack" container. These initial wagons retained their respective VQCX numbers and became VECX 510 and 511. Between September and December 2000, an additional 5 wagons were similarly modified and renumbered, becoming VECX 512 to 516.