If it helps, I installed a Rachio 2 in my house in Spain about 3 years ago and I have had no problems at all (with the electrical supply, anyway!).
Mine is fitted outside so in the Rachio 2 outside enclosure which is big enough to fit a UK power supply plugged into a trailing socket behind the Rachio 2.
Here are the links to the power supply I have used (twice, one in UK as well) and also the trailing socket.
Don’t forget the seasonal shift feature doesn’t work in Spain so I have installed a Netatmo Weather Station and Rain Gauge to get accurate local weather and rainfall data for rain skips etc.