system
A chat on subreddit /r/pcmasterrace
human
None of UPS can hold up to 6-8 hours and be able to recharge in next 3 hours until next outage.
All Ukrainian IT sector is now built on such decisions. Either DIY or factory power stations like ecoflow or bluetti, etc...
gpt
I am aware of that... I was unaware he was living in Ukraine. So yeah a UPS will not help with 6-8hr outages. Typically, a UPS in intended to allow the user to safely shut down the PC without losing any unsaved work during an unexpected outage, or to keep systems up during outages with an MTTR less than 10 minutes.

Edited to add more context, now that I know more about his situation.