With the miners drawing between 1,800w and 2,000w do not even try designing the PSU to run on 110V.  Some uninformed customers may ask about it but they do not realize what trying to supply that much power using 110v line means.

In North America standard 110v receptacles are only rated 15A (1,650w). Running higher loads on 110v would require installation of a 25A 110v line and receptacle. If a new receptacle and line are needed, is just easier (and better) to have 220v service installed.