How does power off or on cause a surge?  That belief comes from many who only believe a first thing told.  Knowledge means ignoring every recommendation that does not also say why - with numbers.

Power loss does not cause a surge and does not damage any properly designed appliance.  Numbers, previously posted, demonstrate why.

UPS is only temporary and 'dirty' power so that unsaved data can be saved.  And so that reboots (due to short power offs) might be avoided.  Nothing more.

Hardware protection from other potentially destructive anomalies require completely different solutions.