Portable Power Supply Station 500W

I live in an apartment in Ukraine, and I don't have light for more than 12 hours a day

so a charging station is needed. So I decided to look for a charging station for two main needs:

- during planned shutdowns, power the PC with the monitor for 6-8 hours (my PC with the monitor consumes an average of 60-80 W)

- during a complete blackout, supply electricity for about 6-8 hours (60 W)

For this, I was looking for a charging station https://www.bluettipower.eu/en-ua/products/eb3a