Caveat: This response focuses on the computer components, not other equipment that might also be powered via the UPS. I've witnessed occasional studies of non-sine wave power currently being incompatible with particular other units. This answer is made up of many of the most practical measurements of this problem on https://taifudo-bodyguard72479.jts-blog.com/32804174/a-review-of-uninterruptible-power-supply-cyberpower