Background:
I’m new to deep-sky astrophotography. My main gear will arrive later this year from China. Since large LiFePO4 power stations cannot be checked in on flights, I’m looking for a local power solution in the US.
I noticed that my NAS uses a DC UPS with 12V output, DC input, and USB-C, so I’m wondering whether it can be used to power ASIAIR and my imaging setup.

Idea:
Connection: Astro gear → ASIAIR → UPS → multiple power banks
My NAS UPS (Ugreen) is rated 12V 10A, 120W max, 43Wh.
Voltage and current seem enough for a normal DSO setup. The UPS’s small internal battery isn’t an issue because I have three ~80Wh power banks that can feed the UPS through its DC-in/USB-C port.

Main Question:
If I use these 3 power banks as the main energy source and let the UPS provide stable 12V output,
do I still need to buy a dedicated outdoor power station,
or is this UPS-based system stable enough for deep-sky imaging?

Using UPS instead of power station for power system？