Rank #3 in Best UPS Battery Backup 2026: 9 Ranked, and Why 2200VA Isn't 2200W
UGREEN NAS UPS 120W DC, 12000mAh
- Rating
- 4.8
- Ratings
- 767
- Rank
- #3
Price and rating as shown on Amazon when we collected them. Both change.
The UGREEN US3000 is the odd one out in this guide. Every other unit here is sold by a VA figure — 550, 650, 850, 900, 1000, 1050 or 2200VA — and each is rated roughly 1.6 to 1.8 times lower in watts. The US3000 carries no VA figure at all. It is listed at 120 Watts output for £99.98, and the big number in its name, 12,000 mAh, is battery capacity rather than output. Both figures also appear in the spec table, where "Output Wattage" and "Wattage" both read 120 watts, so the title figure and the spec table agree at 120W.
Two things are worth checking before you buy. The listing states that this model is not compatible with the DXP6800 and DXP8800 series, while its Item Highlight names DXP2800/DXP2800GT, DXP4800 Pro/DXP4800GT, DXP4800 Plus, DXP480T Plus, DH2300 and DH4300 Plus — read both lists against your own NAS. The Connector Types field reads "ATX", which sits oddly beside a DC unit that UGREEN describes as a constant 120W output for a NAS. It holds 4.8 out of 5 from 767 ratings, and the star breakdown on the page adds up to 100, so those bars are percentages rather than numbers of buyers. Everything on this page is taken from the Amazon listing, not from testing we carried out.
How those 767 ratings break down
An average hides its own shape. This is the spread behind the 4.8 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £99.98 |
|---|---|
| Customer rating | 4.8 out of 5 from 767 ratings |
| Output wattage | 120 Watts, listed twice as "Output Wattage" and "Wattage" |
| Battery | 12,000 mAh, model US3000 |
| Stated NAS compatibility | DXP2800/DXP2800GT, DXP4800 Pro/DXP4800GT, DXP4800 Plus, DXP480T Plus, DH2300, DH4300 Plus |
| Not compatible with | DXP6800 and DXP8800 series |
| Connector types | ATX (as listed) |
| Dimensions and weight | 20.5 x 13.5 x 3.7 cm; 441 g |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“If you've already invested in a UGREEN NAS and some HDDs (or are about to), you really need one of these. I was stood by my NAS when a power cut happened and the uncontrolled "CLANG!" as the HDD arms retracted was sickening, so I got this. Installation is a breeze - it just sits between your existing power cable and the NAS, with a USBC cable plugged into one of the ports (presumably so the NAS can "talk" to the UPS - you can see it's status in the UGOS control panel). It's small and discrete and will sit alongside your NAS in the included stand, so it doesn't take up much space and is almost invisible. I've had two power cuts since I got this a few months ago and it's performed flawlessly. It's a small price to pay to protect your precious data. Not quite sure why they've put all the compliance statements on the front, but this is a minor point. Get one!”
Verified purchase“Easy to use and very easy to setup not had to test how good or quick it is to respond to a power outage connecting up you do need the original NAS power supply as it does not come with one because of how it connects up”
What it is up against
The rivals it was ranked against in Best UPS Battery Backup 2026: 9 Ranked, and Why 2200VA Isn't 2200W.
Questions people ask
Does the UGREEN US3000 have a VA rating?
No. The listing gives no VA figure for the US3000 at all. Power is stated as 120 Watts output, which UGREEN describes as a constant 120W matched to the voltage requirements of UGREEN NAS.
What is the switchover time on the UGREEN US3000?
0 seconds. The listing says the UPS switches to battery operation in 0 seconds in the event of a power outage, so that NAS data transfers finish and the system shuts down in an orderly way.
Which NAS models does the UGREEN US3000 work with?
The listing names the DXP2800/DXP2800GT, DXP4800 Pro/DXP4800GT, DXP4800 Plus, DXP480T Plus, DH2300 and DH4300 Plus, and states that the model is not compatible with the DXP6800 and DXP8800 series.
How long will the 12,000 mAh battery keep a NAS running?
The listing gives no runtime in minutes or hours. The only figures on the page are the 12,000 mAh battery capacity and the 120 Watts output.
How do you monitor the UGREEN US3000?
Through the UGREEN App, which the listing says shows UPS status, battery and protection functions, and which handles automatic NAS shutdown, standby in case of failure and restart when power is restored.
Is a power supply included with the UGREEN US3000?
The listing does not name a power supply among the items. Its spec table gives Connector Types as ATX, and the unit measures 20.5 x 13.5 x 3.7 cm and weighs 441 g.
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