The E22000 is an electric multiple unit built by CAF for use on the ðZBAN commuter rail system. 33 sets of 3 train cars were built between 2010âÂÂ11 and have been operating along the ðZBAN line in ðzmir since 2010. The 22000 series EMUs are powered by 25 kV AC via overhead catenary. Each 3 car set cost â¬3.7 million each.