What type of UPS do I need to get for QubesOS?

My UPS is on the cheaper end, probably with a busted battery (replaced it once before) and QubesOS uses a lot of power so when there’s a blackout my computer loses power within 15 seconds. I run QubesOS always on the powersave governor using xenpm. My hardware is:
A ryzen 5 3400G
An RTX 3060
A single 1080p monitor

I would like to at least be able to shut down QubesOS properly, which on my system takes around a minute. How ‘big’ of a UPS should I get?

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900 VA/560 W is a good start.