A UPS system with on the internet double-conversion topology (and generator mode) will frequently filter dirty power and deliver clean AC output power. Filthy power is noisy, which generates a jagged sine wave but helps prevent greatest power output. The Moi app exhibits power usage, time remaining, and battery standing. https://socialbraintech.com/story3356058/power-up-general-solution-things-to-know-before-you-buy