What is a modified sine wave UPS?
Typically this is what is called a “standby” UPS. In normal operation it delivers utility generated sine wave power. During an outage, or severe voltage drop, the UPS takes over with battery backup and an output of an inverter created modified sine wave. The pulse-width-modified and optimized peak-voltage modified square waveform can actually be more beneficial for some switchmode power supplies. Switchmode power supplies are what predominantly are utilized by computer and telecommunication systems.
