UPS für TS873A + 2xTL-D800C

I have to buy a ne/bigger UPS für my QNAP System.
it consist of a TS-873A (fully Equiped, details: have a look below)
and 2x TLD800C (fully Equiped)

How big shoud a decent UPS be for that System - to provide enough power for the NAS and the 2 exra external Cases?
It should provide enough Power to safely power down the system.

Or wshould I go for 2 oder even 3 Singel UPS?

Thanks in Advance

Full System Specs:

  1. TS-873A (QuTS hero H 5.1.4.2596)
    2x 32GB RAM
    NVIDIA Quadro T1000 LP 4GB
    2x M.2. Samsung 970 EVO PLus 2TB Onboard
    4x M2.2 Samsung 970 EVO PLus 2TB PCIe Karte
    8x SEAGATE X18 18TB
    Extra internal 60mm Fan for Graphics and M.2-PCIe Card

  2. 1st. TL-D800C (USB 3.2 Gen 2 (Type-C))
    8 x SEAGATE X18-18TB HDDs

  3. 2nd. TL-D800C
    8x SEAGATE X18-18TB HDDs


Many Community members forget to include important information when asking questions here in the forums. If it’s a technical question of any kind, please remember * to include:
Your Operating System you are using to access your NAS.
*** Windows 10**

NAS model: TS-873A
Firmware Version/Build numbers - not just “The latest”
*** QuTS Hero H 5.1.4.2596 4B2QEXM7**
Network Setup (ie Single Port or Port Trunking)
*** Single Port 2.5 Gb**

If Disk related please also specify:
Drive Configuration: (ie SingleDrive, RAID0, JBOD, RAID1, RAID5, RAID6, RAID10)
Number of drives

@ TS-873A
2x SDD 970 EVO PLUS 2TB (onboard M2.) @RAID 1 = 1,73 TB 10% Overprov.
8x Seagate X18 ST18000NM00J2TV103 3.5" HDD @RAID 6 = 94,44 TB 5% Overprov.
4x SDD 970 EVO PLUS 2TB (QM2 PCIe Card) @RAID 5 = 4.89 TB 5% Overprov.

@ TL-D800C (via USB-C)
8x Seagate ST18000NM00J2TV103 @RAID 6 = 94,44TB 5% OVerProv.

2nd TL-D800C
8x Seagate ST18000NM00J2TV103 @RAID 6 = 94,44TB 5% OVerProv.

For each drive please provide:
Drive Manufacturer (ie Seagate, WD, Hitachi, etc)
Drive Model

  • See above