Can I get something like a UPS but for brownout protection instead of being a full-on backup?

The mains power in my house is prone to voltage fluctuations to the point where it's fucking with my monitors but my full setup can also pull more watts than most UPS's in my price range say they can provide.

I just want something that can provide cover in the event of a brownout, not necessarily take over in the event of a complete power failure