UGREEN U3000 UPS First Look — Small but Mighty

The wait is finally over — my UGREEN U3000 UPS has arrived!

Right out of the box, I was caught off guard by its size. It’s unbelievably compact — almost the same footprint as my UGREEN Magnetic Power Bank, which makes it feel more like a portable charger than a full UPS system.

This little unit is designed specifically for UGREEN’s NASync lineup, offering 120W of DC backup power with zero-second transfer time. That means if the power cuts out, your NAS keeps running instantly with no delay.

It’s a clean, modern take on backup power — no bulky fans, no heavy lead-acid batteries, and no cluttered cabling. Just a sleek matte black box that slots quietly beside your NAS.

I’ve just got it set up with my UGREEN NASync DXP2800, and here’s a quick look at the hardware, the software integration, and why this might be one of the smartest little UPS units around.

Unboxing & First Impressions

Simple, clean packaging that sets the tone for UGREEN’s minimalist design approach

The box presentation is classic UGREEN — understated and premium. Even before opening it, you get the sense that this is designed to fit neatly into a modern setup rather than dominate it.

Compact Design

The matte finish and solid build make it feel far more premium than its size suggests.

Once unboxed, the size difference really stands out. When placed next to my UGREEN Magnetic Power Bank, they’re nearly identical in dimensions. Seeing them side by side drives home just how compact this UPS truly is — it’s impressive that something this small can output 120W of continuous power.

Almost pocket-sized — the U3000 looks more like a power bank than a UPS.

Ports & Connectivity

Straightforward port layout — DC IN, DC OUT, and USB-C for monitoring.

The rear layout is clean and functional, featuring DC input/output and a USB-C port for communication. It runs silently and uses passive cooling, which is a welcome change from traditional UPS fans humming in the background.

Smart Integration

The U3000 is recognised instantly through the NAS interface with full NUT support.

Connecting the U3000 to the NAS was completely plug-and-play. It appeared right away under the UPS settings as UGREEN US3000, showing battery capacity, firmware version, and auto-shutdown options.

The UPS also supports NUT (Network UPS Tools) — an open-source protocol that allows the NAS to detect power changes and automatically shut down safely if the battery runs low. It’s a small but important addition that makes the system much more reliable in real-world conditions.

Next Steps

Over the next few days, I’ll see how the U3000 performs under normal NAS workloads — how quickly it switches to battery, how stable it runs during short outages, and how the NUT integration behaves over extended use.

If you are building out your NAS, check my guide Choosing the Best Drives for Your NAS Setup and my roundup NAS Compatible Security Cameras to see how it all fits together.

Stay tuned — this compact little unit might be one of the best NAS accessories UGREEN has released so far.

Comments

2 responses to “UGREEN U3000 UPS First Look — Small but Mighty”

November 22, 2025

CB

Is there anything special you have to do to get NUT to recognize the US3000? I can see it on my USB bus when I run lsusb, but nothing shows up when I run nut-scanner.

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1. November 23, 2025
  
  Paul
  
  I tested this directly on my NAS running UGOS. The US3000 appears normally in lsusb, and when I run nut-scanner -U, UGOS detects the UPS straight away and reports it as supported by the HID driver. I did not need to do anything special to make it show up. It was recognised immediately with the default configuration.
  
  If nut-scanner is not detecting it on your system, the behaviour may be different depending on how NUT is packaged or compiled in your environment. On UGOS it works out of the box, but other systems may require manual configuration, updated USB IDs, or enabling HID drivers manually.
  
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