I learned about this influence inside of a factory where we mainly utilized pure sine wave variable frequency motor controllers on prolonged cables because a lot of distortion on a lengthy cable could burn up up a motor. All the outlet house UPS I've viewed seem like pure sine wave. https://elliottletnm.blogerus.com/56002550/the-smart-trick-of-uninterruptible-power-supply-ups-that-no-one-is-discussing