Pafféri said the purchase of the 40 trains was supported by HUF 228 billion in European Union funding.

In addition to the 40 Kiss trains, Stadler Trains Magyarország managing director Róbert Homolya noted that there are 123 Stadler Flirt trains on the tracks in Hungary, providing the "backbone" for MÁV-Start's modern fleet.

The contract for the Kiss trains was signed in 2017 and the first multiple units were put on the tracks in 2020.