Question Stabilizer power rating please help

[Personal17]

Is a 500va stabilizer more than enough for a 520w PSU and if not is 1000 ok?
Thank you.

 

[Lutfij]

Make and model of your PSU as well as the UPS?

 

[Personal17]

Make and model of your PSU as well as the UPS?

I have a seasonic 520w PSU I don't know if I'm gonna buy an AVR or Ups but just wanted info so which va rating should I buy