What are the differences between VFD and Softstarter? If you're planning to join a company with equipments or products like those mentioned above. You should study the differences between the them in different aspects. It would be probably asked during the interview stage. This is one of the questions that I encountered during job interview for a sales and distribution company. Aside from how to install and program it, to study the working principle is a must for an easy explanation. For the main difference, a Softstarter is commonly used in applications where there is a large inrush of current that could damage a motor while VFD controls and can vary the speed of a motor. This article will discuss more of their differences in terms of