Phase Technologies is a power electronics manufacturer located in the Black Hills of South Dakota. We take pride in having engineering and manufacturing of our phase converters, variable frequency drives, and other products right here in Rapid City, SD. Phase Technologies is proud to be a USA manufacturer.
222 Disk Drive
Rapid City, SD 57701
8:00am to 5:00pm, Monday through Friday (Mountain Daylight Time)
Closed Saturday and Sunday