Can power supplies/adapters be used to clean up dirty generator power?

[mcblatz]

What if I am plugged into a battery backup/surge protector? Will this clean up the frequency.

 

[berkeman]

Welcome to PF.

What if I am plugged into a battery backup/surge protector? Will this clean up the frequency.

A UPS unit will contain an inverter to convert the DC battery power to AC Mains power. The harmonic distortion (THD) rating will depend on the specs of the inverter. It's not a matter of cleaning up the 50/60 Hz frequency, it's a matter of how "clean" the AC Mains sine wave is (since it's being generated with switching magnetic circuits).

https://en.wikipedia.org/wiki/Power_inverter