UPSes can be used as an example. Higher end UPSes usually output a proper sine wave, where as cheaper ones do not. https://superuser.com/a/912689 https://super

UPSes can be used as an example. Higher end UPSes usually output a proper sine wave, where as cheaper ones do not. https://superuser.com/a/912689 https://superuser.com/a/912689 It probably isn't going to damage any modern equipment, but some equipment may randomly shut off or not work correctly.