Possibly. You can set it to charge in the middle of the night, then run it off batteries when listening to your stereo. Don't be surprised if it has a loud fan though. Also don't be surprised if when someone turns it on/off for you, you cannot hear any difference. YMMV. It is a small investment overall and has lots of other uses.
Is this an alternative to Stromtank and PS Audio ?
Would these intelligent AC batteries be an alternative for high-end audio?