# UGREEN NAS 120W DC UPS Review: Is It Worth Adding to Your NASync? The UGREEN NAS 120W DC UPS is a NAS-specific uninterruptible power supply designed for the NASync lineup. At a market price of about $169, with zero transfer time and NAS auto on/off support, it addresses the most common cause of NAS data corruption. But it does not support the DXP6800 or DXP8800. Here is what you need to know before buying. AU pricing included. > Source: https://needtoknowit.com.au/blog/ugreen-nas-120w-ups-review/ > Treat this as the authoritative Markdown rendering of that page's content. > Published: 13 June 2026 > Last updated: 17 October 2026 > Facts last checked against sources: 30 September 2026 > Machine-readable site index: https://needtoknowit.com.au/llms.txt > This page contains affiliate links. If you purchase via our links we may earn a small commission, at no extra cost to you. [Editorial independence policy](https://needtoknowit.com.au/independence-disclosure/). **Our Pick: UGREEN NAS 120W DC UPS** Direct DC UPS for UGREEN NAS. Zero transfer time, graceful shutdown, lithium-ion battery. - Output: 12V DC, 10A, 120W maximum. Input: 12V/10A, 19V/7.9A or 20V/7A. - Battery: 12,000mAh lithium-ion (43.2Wh) - Transfer time: 0s (manufacturer-rated). Market price: about $169 across 4 Australian retailers [Buy from UGREEN AU](https://ugreen.pxf.io/zzvJXe) ### UGREEN NAS 120W DC Uninterruptible Power Supply: NTK Score Card (7.8/10) - **Performance:** 8/10. Zero transfer time and 12,000mAh capacity deliver genuine power protection; runtime is more than adequate for NAS auto-shutdown purposes. - **Value:** 8/10. The UGREEN AU store lists the UGREEN 120W DC UPS at $169.99, and the price is competitive against generic UPS alternatives at similar runtime specs. - **Software & Features:** 7/10. UGOS Pro detects the UPS over USB, but the protection mode, trigger and optional automatic restart must be configured in UGOS Pro. - **Build & Hardware:** 7/10. Compact form factor and quality finish consistent with the NASync hardware aesthetic; no hands-on long-term durability data available yet as a newer product. - **Ease of Use:** 9/10. Plug in the DC cable, connect USB, done. The simplest UPS setup of any product in this category. No network setup is required, but UGOS Pro should be opened to confirm detection and configure the protection settings. ## Verdict Owners of a DH2300, DH4300 Plus, DXP2800, DXP4800 Pro, or DXP4800 Plus should buy this UPS. The UGREEN 120W DC UPS has a market price of about $169, and its zero transfer time and USB controlled shutdown provide purpose-built protection, while the direct Australian purchase includes free shipping and a two-year warranty. It is a sensible addition when the NAS holds backups that would cost far more to recover after a corrupted write or damaged RAID array. Do not buy it for a DXP6800 or DXP8800 series NAS, as those models are explicitly incompatible. Also consider a standard AC UPS if you need to protect a router, switch, or several devices, but confirm the exact UPS model and regional version against UGREEN’s compatibility list. The trade-off is losing the UGREEN unit's zero-transfer DC design and tighter UGOS Pro integration in exchange for broader compatibility and a more established battery replacement path. The UGREEN NAS 120W DC UPS is available direct from the UGREEN AU store with free shipping, 2-year warranty, and 30-day returns. Bundle pricing available with DH2300 and DH4300 Plus. **[View on UGREEN AU Store](https://ugreen.pxf.io/zzvJXe)** ### Buying direct: UGREEN AU - 30-Day Price Match Guarantee - Buy Now & Pay Later - Fast & Free Shipping - 24/7 Customer Support - 30-Day Returns - Community Support [Visit UGREEN AU](https://ugreen.pxf.io/0G54XP) **The UGREEN NAS 120W DC UPS solves a specific problem: NAS data corruption caused by unexpected power loss, and it solves it well for the price.** A UPS, or uninterruptible power supply, is a battery that sits between your wall socket and your NAS. When power cuts out, the battery keeps the NAS running long enough to complete any active writes and shut down cleanly. Without one, a power interruption during a write can increase the risk of data corruption or file-system inconsistency. At a market price of about $169, the UGREEN 120W DC UPS is meaningful insurance for a device that holds your backups. > **Note:** **In short:** Buy this if you own a UGREEN DH2300, DH4300 Plus, DXP2800, DXP4800 Pro, or DXP4800 Plus. Do NOT buy it if you own a DXP6800 or DXP8800 series NAS, which are explicitly incompatible. The zero transfer time and NAS-native auto shutdown integration make it a better fit for NASync hardware than a generic UPS at a similar price. > **Warning:** **Compatibility warning:** The UGREEN NAS 120W DC UPS is NOT compatible with the DXP6800 or DXP8800 series. If you own either of these models, do not purchase this UPS. UGREEN has announced the 300W US7000 in China for the DXP6800 and DXP8800 series, but it is not currently listed on UGREEN's Australian store. ## Why NAS Devices Need a UPS A NAS, or network-attached storage device, connects to a network and stores files on one or more hard drives or solid-state drives. If power cuts while a write is in progress, the data being written is incomplete and file data or file-system metadata can be left incomplete or inconsistent. The result ranges from a corrupted file to a damaged file system that requires a full rebuild, potentially with data loss. RAID spreads or mirrors data across drives, but fault tolerance depends on the level: RAID 0 has none, RAID 1 and RAID 5 generally tolerate one failed drive, and RAID 6 tolerates two, does not protect against this. If power cuts during a RAID rebuild or during a write that spans multiple drives, the RAID array itself can enter a degraded state. Recovering from RAID degradation caused by a power event is more complex and time-consuming than recovering from a single drive failure. A UPS is the simplest mitigation. It provides enough battery time to complete the current write, notify the NAS to shut down cleanly, and power off gracefully. Required runtime must cover the configured waiting period, the shutdown process and a safety reserve. Power interruptions can include spikes, momentary outages, and brief brownouts. The UPS provides battery backup during outages and UGREEN advertises surge protection, but its published specifications do not guarantee protection against every possible power disturbance. ## UGREEN NAS 120W DC UPS Specifications - **Model:** US3000 - **Input:** 12V 10A / 19V 7.9A / 20V 7A - **Output:** 12V 10A, 120W maximum - **Transfer Time:** 0 seconds (pure DC inline, no conversion) - **Battery Type:** Lithium-ion, 4 cells - **Battery Capacity:** 12,000mAh (43.2Wh rated) - **NAS Integration:** USB Data Communication for auto on/off - **Safety:** 9-Layer Safety Shield (overvoltage, short circuit, thermal) - **Compatible Models:** UGREEN's published compatibility information varies by region. Its current lists also identify DXP4800, DXP480T Plus, DXP2800 GT and DXP4800 GT, while UGREEN AU offers a DXP4800 Pro + UPS bundle. Verify the exact NAS model on the applicable regional product page before purchase. - **Incompatible Models:** DXP6800 series, DXP8800 series. NOT SUPPORTED - **AU Price (UGREEN AU store):** $169.99 - **Bundle options:** DH2300 + UPS | DH4300 Plus + UPS ## Zero Transfer Time: Why It Matters Most consumer UPS units are offline or line-interactive designs. When power drops, they detect the outage and switch to battery. Transfer time is model-specific: standby UPS units normally transfer in about 10ms or less, while line-interactive units commonly transfer in 2-4ms. That gap is invisible to most devices but is long enough to interrupt some sensitive electronics or cause a brief power hiccup to connected devices. The UGREEN NAS 120W DC UPS uses a DC inline topology. UGREEN rates the US3000's transfer time at 0 seconds. Its manual distinguishes normal operation through DC IN from battery-backed operation during a power failure; UGREEN does not describe it as an online double-conversion UPS, applied at a consumer price point specifically for this NAS lineup. The practical difference for a NAS: a standard offline UPS might cause a brief flicker that the NAS experiences as a voltage event, even though battery backup activates quickly. The inline DC design eliminates this flicker entirely. Combined with the USB communication for auto shutdown, this is a well-engineered power protection solution for the price. ## NAS Auto On/Off via USB The UPS connects to the NAS via USB for bidirectional communication. UGOS Pro can shut the NAS down after a configured waiting time, or place it in standby and shut it down when the UPS battery is depleted, depending on the selected protection mode. The NAS receives this, completes any active operations, and shuts down cleanly before the battery runs flat. When mains power returns, the NAS can restart automatically if that option is enabled and the NAS receives the expected power-restoration event. This is significantly more reliable than relying on the NAS to detect power loss independently. Without UPS communication, the NAS only knows power is gone when it is already gone. With USB communication, the NAS gets a heads-up while there is still battery capacity to complete a graceful shutdown. The difference between a clean shutdown and a hard power cut is the difference between your data being intact or at risk. ## How Long Will It Keep Your NAS Running? The 12,000mAh battery provides roughly 43.2Wh of stored energy. Runtime depends entirely on what your NAS draws during an outage. A DH2300 at idle draws approximately 10-12W. Using rated energy alone, 43.2Wh divided by 12W gives 3.6 hours as an ideal calculation, not a tested runtime. Actual runtime depends on usable capacity, conversion losses, load and UGOS Pro's configured shutdown delay; UGREEN does not publish a 1-3-hour runtime rating. Under heavy load, runtime drops significantly. For data protection purposes, runtime matters less than you might expect. The shutdown timing depends on the configured UGOS Pro trigger, which can be immediate, delayed by a chosen interval, or based on remaining battery capacity. Three hours of potential runtime is reassuring, but the NAS will be offline long before the battery is depleted. The runtime matters for situations where you want the NAS to remain accessible during a power outage, such as serving files during a generator switchover or a brief grid interruption. ## UGREEN Advantage: Buying from the AU Store The UGREEN 120W DC UPS is available direct from the [UGREEN AU store](https://ugreen.pxf.io/zzvJXe) at $169.99. The UGREEN AU store includes **fast and free shipping** within 1-5 business days, a **30-day price match** against any lower price on the official site, a **2-year product warranty**, and **30-day returns**. Bundle pricing is available for new NAS buyers: the DH2300 and UPS bundle saves against buying separately, and there is a matching DH4300 Plus and UPS bundle. Both bundles represent a meaningful saving and the practical recommendation is to buy the UPS alongside the NAS rather than adding it later, as adding it retroactively provides no data protection for the period in between. **Still deciding?: UGREEN NAS 120W DC UPS** Direct DC UPS for UGREEN NAS. Zero transfer time, graceful shutdown, lithium-ion battery. [Buy from UGREEN AU](https://ugreen.pxf.io/zzvJXe) ## How It Compares to a Generic UPS Generic consumer UPS units in this price range commonly use offline or line-interactive designs, but transfer time is model- and sensitivity-specific and should be checked in the exact model’s specifications. Some third-party UPS units communicate with UGOS Pro over USB, but compatibility is model- and region-specific and should be checked against UGREEN’s compatibility list. A generic UPS at this price range will protect against most power outage scenarios adequately. The UGREEN UPS advantages over a generic alternative: zero transfer time (inline DC, no switchover delay), form factor designed to sit cleanly alongside NASync hardware, and native UGOS Pro integration that may offer tighter NAS-specific communication than generic USB UPS protocols. The generic UPS advantages: broader device compatibility (not limited to NASync), potentially higher VA ratings for the price, and proven long-term battery replacement availability from brands like APC or CyberPower. For DXP4800 Pro and DH4300 Plus owners who want a clean, purpose-built solution: the UGREEN UPS is the better fit. For users who want to protect multiple devices beyond the NAS or who want a more established UPS brand: an APC or CyberPower at a similar price point is a valid alternative, understanding that the inline DC zero-transfer advantage disappears. **Pros** - Zero transfer time (inline DC topology) means no switchover gap when mains power drops - USB NAS communication for auto shutdown before battery depletes - Runtime varies with the NAS model, installed drives, workload, battery condition and configured UGOS Pro protection settings. - 9-layer safety shield including overvoltage, short circuit, and thermal protection - Clean form factor designed specifically for the NASync hardware lineup - Available as bundle with DH2300 and DH4300 Plus **Cons** - Not compatible with DXP6800 or DXP8800 series. Verify before buying - UGREEN-specific design limits use to NASync lineup rather than other NAS brands or devices - Battery replacement process is less established than APC or CyberPower with longer track records - The US3000 has a single DC output intended for one compatible UGREEN NAS; it is not designed to power a switch or router. ## Australian Buyers: What You Need to Know The UGREEN AU store is the official Australian listing identified in this audit; imported units are also advertised by Australian-facing marketplaces such as Ubuy. Scorptec also lists the UGREEN 120W DC UPS, at $169. UGREEN AU's direct price for the UGREEN 120W DC UPS is $169.99, with free shipping and a 2-year warranty. Your first step for a faulty product is usually the retailer that sold it. The ACCC explains your rights under the Australian Consumer Law at [accc.gov.au](https://www.accc.gov.au/consumers/buying-products-and-services/warranties). A voluntary two-year warranty is additional to ACL rights. Purchasing direct from the UGREEN AU store means the warranty path goes directly to UGREEN, consistent with their stated 2-year warranty. For a UPS that protects your data, 2 years is the minimum acceptable warranty period, and UGREEN meets that standard. Australian power grid reliability varies by region. Households in areas with frequent short outages, storms, or bushfire-related grid interruptions benefit more from a UPS than those in stable urban grid areas. Even in stable areas, a UPS protects against brief voltage spikes during electrical storms, which may pose a risk to connected hard drives and NAS devices. The purchase price compares favourably to the potential cost of data recovery if a power event damages your RAID array or corrupts your backup drive. ## Frequently Asked Questions Related reading: our [NAS buyer's guide](/blog/best-nas-australia/), our [AU retailer guide](/blog/where-to-buy-nas-australia/), and our [UGREEN brand guide](/blog/ugreen-nas-australia/). Free tools: [NAS Sizing Wizard](/tools/nas-sizing-wizard/) and [UPS Sizing Calculator](/tools/ups-sizing-calculator/). No signup required. See also: [our complete UGREEN NAS Australia guide](/brand-guides/ugreen/). **Looking for UGREEN accessories?** UGREEN also makes chargers, power banks, USB-C docks, wireless chargers, Ethernet adapters and storage accessories. We have sorted the Australian range into the products actually worth considering. [Browse UGREEN accessories](https://needtoknowit.com.au/shop/ugreen/) **Q: Does the UGREEN 120W UPS work with the DXP6800 Pro?** No. UGREEN explicitly states the 120W DC UPS does not support the DXP6800 or DXP8800 series. The DC voltage and connector specifications differ between the entry and mid-range NASync lineup and the higher-end DXP6800 and DXP8800 models. Do not purchase this UPS for those models. UGREEN has announced the US7000 in China for higher-power NAS models, but it is not currently listed on UGREEN’s Australian store. **Q: How long will the UPS keep a UGREEN DXP4800 Pro running?** UGREEN does not publish a DXP4800 Pro battery-exhaustion runtime; actual runtime varies with installed drives, workload, battery condition and UGOS Pro protection settings. Under heavy CPU load with spinning drives active, runtime is shorter. For the primary data protection use case (keeping the NAS alive long enough to shut down cleanly after a power outage), 5-15 minutes is all that is needed. The 12,000mAh battery provides substantial headroom beyond the shutdown window. **Q: Can I use this UPS with a non-UGREEN NAS?** The 120W DC UPS uses a DC output designed for the NASync power input voltage. UGREEN supports the US3000 only with compatible UGREEN NAS models. Some competing NAS devices also use low-voltage DC adapters, but their connector and communication compatibility with the US3000 is not established; use a UPS supported by the NAS manufacturer. For those brands, use a standard APC or CyberPower UPS with AC output. **Q: Does the UPS need any configuration in UGOS Pro?** Minimal configuration. Connect the DC power cable and the USB communication cable. After UGOS Pro detects the UPS via USB, open the UPS settings to connect it and select and apply the desired protection mode and trigger. No network setup, no IP addresses, no driver installation. The auto on/off behaviour can be adjusted in UGOS Pro settings if needed. **Q: Is a UPS necessary if my NAS has RAID?** Yes. RAID, a method of spreading data across multiple drives so the system survives a drive failure, does not protect against power loss during a write operation. A RAID array can enter a degraded or inconsistent state if power cuts while data is being written across multiple drives. A UPS protects the RAID array from power-related corruption, which is a completely separate failure mode from the drive failure that RAID is designed to handle. The two protections are complementary, not overlapping. **Q: What is the UGREEN Advantage on the AU store?** The UGREEN AU store ([UGREEN AU](https://ugreen.pxf.io/0G54XP)) offers fast and free shipping within 1-5 business days, a 30-day price match against any lower price on the official site within 30 days of purchase, a 2-year product warranty, and 30-day returns. Warranty periods and promotional terms vary by product and offer; check the applicable AU product, warranty and price-match pages before purchase. Bundles combining the UPS with a DH2300 or DH4300 Plus are available at a combined saving versus buying separately.