Checked October 3, 2026 (01:26 KST) against one official page: UGREEN’s NAS compatibility list and its FAQ. We have not bought, connected or tested any UPS or NAS, and we have not run a power-cut or shutdown test. This is a pre-purchase documentation checklist, not a product recommendation.
Short answer: A UPS that keeps your NAS powered and a UPS that your NAS can talk to are two different questions. The first is about the battery and its output. The second is about whether the NAS recognizes the UPS and can act on its status, for example by shutting down before the battery runs out. Check both, on your exact NAS model and the exact UPS model, before you pay.
Two paths, two questions
Think of a NAS UPS as two separate connections:
- The power path. Mains power → UPS → NAS. The question here: can this UPS supply what your NAS (plus anything else plugged into it) draws, for as long as you need?
- The status path. UPS → NAS, over a data connection. The question here: does your NAS recognize this UPS, and can it be set to react when the UPS reports it’s on battery?
A bigger battery only answers the first question. A product page saying "works with NAS" may only be answering one of them, and it may not say which.
Start with exact model names, not brands
Write down three things before you compare anything:
- Your exact NAS model (not just the series)
- Your NAS operating system and firmware version
- The full UPS model or part number
This matches how UGREEN tells you to use its own list. Its general compatibility FAQ says "Select your exact UGREEN NAS model, choose the hardware type," and "Confirm the full part number." For UPS specifically, the FAQ says to "Select your exact NAS model, choose UPS, and verify the UPS model in the results."
Why the model matters even within one brand: on the same page, UGREEN’s store menu (shop labels, not compatibility-list results) describes its own UPS2000 as "Only Support DH Series" and its UPS3000 as "Only Support 2-4Bay Series." Shop labels can change, so check the list itself for your model. Either way, "it’s a UGREEN UPS" or "the seller says it’s compatible" is not the same as a result for your NAS model in the list. If a listing and the manufacturer’s list disagree, treat it as unresolved until the manufacturer’s own list or documentation settles it.
What a compatibility listing does and doesn’t tell you
UGREEN’s FAQ is direct about the limits:
- Listed means basic interoperability. "A listed result confirms basic hardware interoperability; it does not calculate runtime or guarantee that the UPS can support your full load."
- Not listed doesn’t mean it won’t work. "An unlisted component is not automatically incompatible, but UGREEN has not verified basic interoperability for that exact component and NAS model. UGREEN cannot guarantee its stability or performance."
- Results can change. "NAS firmware and hardware revisions can affect component recognition, stability, and performance." The page’s notes also say actual compatibility "may vary depending on the product model, firmware/software version, and device configuration."
UGREEN’s own term for what a listing confirms is "basic hardware interoperability." It explicitly doesn’t settle runtime or load, which is the power path. And the FAQ doesn’t present the list as the answer for the status path either: for wattage, runtime, communications and safe shutdown, the FAQ points to a separate UGREEN "NAS UPS buying and setup guide" rather than the list itself.
The four-row worksheet
Fill this in for the NAS and UPS you’re actually considering. Leave a cell blank or write UNKNOWN if the official spec sheet, compatibility list or manual doesn’t say. Don’t fill it from a forum post or a seller’s Q&A.
| Check | What to record | Your answer |
|---|---|---|
| 1. Load vs. output | Your NAS’s stated power draw (plus other devices on the UPS) and the UPS’s official output rating | |
| 2. Official compatibility | Does the manufacturer’s list show this exact UPS for your exact NAS model? (Yes / Not listed) | |
| 3. Status connection | Which connection your NAS documentation says it supports for UPS status, and whether this UPS offers that connection | |
| 4. Shutdown setting | Which UPS behavior your NAS lets you configure, as named in its own settings or documentation |
Rows 1 and 2 answer different questions, so a "yes" in one doesn’t fill the other. Row 4 is where you confirm the NAS can actually be told what to do when power fails; check it in your NAS’s own documentation, because settings and their names may differ between NAS operating systems.
If you go with an unlisted UPS
That’s your call, and UGREEN doesn’t say it’s forbidden. Its FAQ does say: "If you use an unlisted component, test it before relying on it for important data and maintain a separate backup." A UPS is not a backup. It buys time on battery; it doesn’t keep a second copy of your files.
What this page doesn’t tell you
- How long any particular UPS will run your NAS. The compatibility list doesn’t calculate runtime, and we haven’t measured it.
- That any UPS will prevent data loss. We make no such claim.
- How a specific NAS OS’s shutdown modes behave. We couldn’t read UGREEN’s setup article with our source tool, so we don’t describe its modes here. Check your NAS’s own documentation.
- Current price, stock or whether any store link earns a commission. The only link below is the manufacturer’s compatibility page, cited as our source. It isn’t an affiliate link. If we ever add a shopping link, it will be after we verify that exact offer, and any affiliate relationship will be disclosed before the link.
Quick checklist
- [ ] I’ve recorded the exact NAS model, firmware version and full UPS part number.
- [ ] I’ve checked the power path (load vs. official output) separately from the status path (recognition and connection).
- [ ] I’ve looked up this exact UPS for my exact NAS model in the manufacturer’s list, not just the seller’s listing.
- [ ] I know which shutdown setting my NAS offers, from its own documentation.
- [ ] Anything the official sources don’t state is marked UNKNOWN, not guessed.
Source
- UGREEN, "UGREEN NAS Compatibility List for HDDs, SSDs, RAM & UPS" (notes, UGREEN NAS Compatibility FAQs incl. "How do I check UPS compatibility with UGREEN NAS?", and store menu labels): https://ai.ugreen.com/pages/compatibility (read October 3, 2026, 01:26 KST)