When we were looking to purchase a rotary phase converter for our shop we noticed a lot of price differences. Having bought cheaper items in the past, we knew all too well of quality and support issues down the road. Therefore we choose to purchase from American Rotary. American quality and American support. We are in our seven year of usage without a problem until we recently relocated the system to accommodate some new machinery. Due to our error, the converter wasn’t working properly. A quick call to Chris at American Rotary and within a couple minutes, he directed us which lead to the discovery of our installation mistake. Within minutes, the entire system was up and running. No service calls, no fee’s, just great help. A+ company.