The mains powered trains will, I believe, only work in their own countries - i.e. US ones in the US, European ones in Europe - that's why Playmobil produced different versions. Indeed, at one time I believe there were three versions - USA, Europe and UK, but walts-trains could answer this and Alex's question for sure). Electricity in the USA is 110/120v AC (sources vary on which!) and in Europe it is 220v AC.