A UPS method with on the net double-conversion topology (and generator method) will continually filter filthy power and make clean up AC output power. Dirty power is noisy, which generates a jagged sine wave but stops maximum power output. These systems usually are what are referred to as “stand-by” systems. https://power-up-power-systems42975.ampblogs.com/power-up-general-solution-things-to-know-before-you-buy-66619892