TerraMaster Forum

[My UPS + TNAS Experience]
UPS brand + model: CyberPower PR1500ERT2U (Rackmount UPS)
TNAS model: F6-424 Max
Experience: Shows up in control panel and works.
Problems / shortcomings: None that I am aware of.
Useful tips: NIL
Purchase channel: It's old.

[My UPS + TNAS Experience]

UPS brand + model: Eaton 3S 700 FR
TNAS model: F4-425 Plus
Experience: 40min backup for the NAS + Freebox Ultra Server (2784 sec on TOS 6)
Problems / shortcomings: N/A
Useful tips: USB cable provided in the box
Purchase channel: Amazon https://amzn.eu/d/3OgZHgx

[My UPS + TNAS Experience]

UPS brand + model: APC 600VA APC Back-UPS (BE600M1)
TNAS model: F4-424
Experience: 30 min backup for the NAS + 2.5 G switch, + Router (1792 Sec on TOS6)
Problems / shortcomings: N/A
Useful tips: USB cable provided in the box
Purchase channel: Amazon https://www.amazon.ca/dp/B01FWAZEIU

Thank you all for the information and valuable insights you've provided. I'm also deeply grateful for your understanding and support towards Terramaster.

Good afternoon, I have an F2-423, after updating to TOS 7, it stopped recognizing my Cyberpower VP700ELCD UPS. Any solutions?

Can anyone suggest small UPS, with dimensions like F8 SSD?

Furilo wrote: ↑04 Jan 2026, 02:25

We sincerely apologize for the inconvenience you’ve experienced.

The UPS you are using is not listed on our official compatibility list ( https://www.terra-master.com/pages/comp ... tab_A8cfP6 ), so compatibility issues may occur. However, based on your description, the UPS works correctly on TOS 6 and only fails to be recognized after upgrading to TOS 7. This is indeed an issue that requires further investigation.

To help us identify the root cause more efficiently, we recommend contacting us via LiveChat on the TerraMaster official website. We will arrange remote technical support to assist you with troubleshooting.

Thank you for your understanding and support!

Thank you for your quick response

UPS brand + model: APC BR700G (APC Back-UPS Pro 700)
Your TNAS model: F5-221
Your experience: System will not boot if USB cable from UPS to NAS is connected. When USB is disconnected, NAS will boot but as soon as USB cable is connected the system will abruptly shut down.
Problems or shortcomings: System will shutdown or not boot when USB to UPS is connected
Tips & tricks: N/A
Where you bought it: Amazon

nolan39 wrote: ↑16 Jan 2026, 23:54

Get the free apc software and check the ups is set up to specs.