Companies are still testing drive inverters with signal HiL, throttles, locked motors, multi-quadrant power suppliers and an e- motor test stand. With all the risks, delays and surprises that are only visible later. Or first appear on the road. This is a waste of valuable time. Fault scenarios cannot be sufficiently tested. The alternative; the virtual e-motor from SPS. Motors rotate as in practice – without mechanics. Power is transmitted. Voltage returns. The characteristics of the e-motor are reproduced on the electrical connection level. Companies that use “concurrent engineering” employ inverter test systems. In order to test inverter and e-motor independently of each other – parallel. And this is the only way to go in the future.