The Shapeoko and Nomad electronics are compatible with 220V power. The power supplies that we use auto-switch between 110 and 220V, so there's nothing you have to do.
Our machines come with an American C-13 grounded cord (standard C13 cord with a NEMA 5-15 plug), so you will be responsible for switching that part out of it is not compatible with your mains power style. Below is an image of the power supply and mains cord:
The Carbide Compact Router is NOT compatible with 220VAC! If you live somewhere that 110VAC power is not the norm, then you will need to source a 220VAC version.
The Makita RT0700 is available is most locations and its 65mm diameter fits the spindle mount for a Shapeoko.
The Carbide 3D VFD spindle is not compatible with 220V, it's built only for 110V.