How to Choose and Set Up a UPS for UGREEN NAS

The best UPS for a UGREEN NAS is one that supports your exact NAS model, can carry the full protected load, and communicates with UGOS Pro. This gives the NAS enough time to enter standby or shut down safely when utility power fails.

A UPS reduces the risk of interrupted writes, file-system problems, and power loss during RAID operations. It does not replace an independent backup. For broader outage preparation and recovery guidance, see How to Protect Your NAS During a Power Outage.

Which UGREEN UPS Is Compatible With Your NAS?

UGREEN offers two compact DC UPS models for compatible UGREEN NAS systems: US2000 and US3000.

US2000 compatibility

The UGREEN NAS US2000 72W DC UPS is compatible with:

• DH2300
• DH4300 Plus
• DXP2800
• DXP2800 GT

US2000 provides up to 72W output with a 22.2Wh, 6000mAh lithium-ion battery. It is the lower-capacity option for the compatible two-bay DXP models and supported DH-series models.

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US3000 compatibility

The UGREEN NAS US3000 120W DC UPS is compatible with:

• DH2300
• DH4300 Plus
• DXP2800
• DXP4800 Plus
• DXP4800 Pro
• DXP480T Plus

US3000 provides up to 120W output and approximately 10 minutes of backup power. Actual runtime varies with the NAS model, installed drives, active workload, battery condition, and UGOS Pro protection settings.

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How Do You Check Third-Party UPS Compatibility?

For a standard AC UPS, compatibility must be checked against both the exact NAS model and the complete UPS model number. These models have been tested for basic compatibility with UGREEN NAS.

Use the UGREEN NAS Compatibility List before buying a third-party UPS:

1. Select your exact UGREEN NAS model.
2. Choose UPS as the component category.
3. Find the complete UPS model number.
4. Confirm that the regional version matches the unit you plan to purchase.

Should You Choose a DC UPS or a Standard AC UPS?

UGREEN DC UPS products and standard AC UPS units protect a NAS in different ways.

Choose US2000 when you have a compatible DH2300, DH4300 Plus, DXP2800, or DXP2800 GT and want compact protection dedicated to that NAS.

Choose US3000 when you have one of its confirmed compatible models and need the higher 120W output. This includes the DXP4800 Plus, DXP4800 Pro, and DXP480T Plus.

Choose a standard AC UPS when:

• You have a DXP6800 or DXP8800 series NAS.
• The NAS model is not supported by US2000 or US3000.
• The router and switch also require battery power.
• Several devices need to share one UPS.
• You need longer runtime.
• You need network or SNMP-based UPS management.

How Do You Connect US2000 or US3000?

Finish active file transfers and shut down the NAS before changing the power connection.

1. Connect the required NAS power adapter to the wall outlet.
2. Connect the adapter’s DC plug to the DC IN port on the UPS.
3. Connect the UPS output cable to DC OUT.
4. Connect the other end of the output cable to the NAS power input.
5. Connect the UPS USB data port to a rear USB port on the NAS.
6. Confirm that every connector is fully seated.
7. Power on the UPS if required.
8. Start the NAS.
9. Open UGOS Pro and confirm that the UPS is detected.

Important US3000 setup details

US3000 does not include a separate power adapter. Use the original power adapter supplied with the NAS.

The unit may arrive in Energy-Saving Mode. Switch it to Normal Mode before relying on it for outage protection.

When charging begins, the indicator flashes white. After the NAS starts, confirm that UGOS Pro reports the UPS model, battery level, and available runtime.

A UGREEN DC UPS protects the NAS power path. It does not provide AC outlets for a router or network switch. If those devices must stay online, give them separate battery backup or choose a standard AC UPS with enough outlets and capacity.

How Do You Connect a Standard AC UPS?

A standard AC UPS provides battery-backed AC outlets.

1. Finish active transfers and shut down the NAS.
2. Connect the UPS directly to a suitable wall outlet.
3. Plug the NAS power adapter into a battery-backed UPS outlet.
4. Connect the router and switch to battery-backed outlets if they must remain online.
5. Place nonessential equipment on surge-only outlets where available.
6. Connect the UPS USB data cable to a rear USB port on the NAS.
7. Turn on the UPS.
8. Start the NAS.
9. Confirm that UGOS Pro detects the UPS.

Some UPS units have both battery-backed and surge-only outlets. The NAS must use a battery-backed outlet.

For a network-managed or SNMP UPS, complete the physical power connections first and then configure the network connection using the options available in UGOS Pro.

How Do You Configure UPS Protection in UGOS Pro?

After connecting the power and communication cables:

1. Open the UGREEN NAS app, desktop client, or web interface.
2. Go to Control Panel → Hardware & Power → UPS.
3. Wait for UGOS Pro to detect the connected UPS.
4. Select Connect.
5. Confirm the displayed UPS model, battery capacity, and estimated runtime.
6. Choose a protection mode.
7. Choose when the protection action should begin.
8. Select Apply.

UGOS Pro provides two primary protection modes.

Standby Mode

Standby Mode stops NAS services when the configured trigger is reached. This protects active data and reduces power consumption. The NAS powers off if the UPS battery is exhausted.

This mode is useful when short outages are common and you want the NAS to stop services without initiating an immediate full shutdown.

Auto Shutdown

Auto Shutdown performs a normal system shutdown when the configured trigger is reached.

Choose this mode when the priority is ensuring that the NAS fully powers off before the UPS battery is depleted.

When should protection start?

Available trigger options can include:

• Immediately after the outage is detected
• After a custom waiting time
• When UPS battery capacity falls below 15%

An immediate action preserves the most battery capacity. A waiting period allows the NAS to continue operating through brief outages but requires enough runtime to cover both the delay and the shutdown process.

For US3000,Leave enough battery reserve for shutdown when choosing the waiting period. Avoid a delay that leaves too little time for the NAS to complete shutdown.

How can the NAS restart after power returns?

Enable Power on automatically in the NAS power settings if you want the system to start when stable external power returns.

Automatic restart depends on the NAS receiving the expected power-restoration event. If utility power returns before the UPS completes that output cycle, the NAS may not experience the power interruption needed to trigger automatic startup.

This behavior can occur with APC BK650M2-CH and BE600M1 units when Auto Shutdown is set to Immediately and utility power returns within the UPS’s approximately two-minute delayed-cutoff period. Allow the UPS to complete its output shutdown or use a configuration tested for the required restart behavior.

How Should You Maintain a NAS UPS?

Include the UPS in normal NAS maintenance:

• Keep it in a cool, dry, ventilated location.
• Keep vents clear of dust and surrounding objects.
• Check cables after moving the NAS or UPS.
• Review battery status and estimated runtime in UGOS Pro.
• Run a short outage-detection test every 6 to 12 months.
• Retest after changing the UPS, cabling, firmware, or shutdown settings.
• Follow the model’s service instructions when runtime drops or a battery test fails.

For UGREEN UPS firmware, use the UGREEN NAS Download Center to obtain the file for the correct model. Charge the UPS battery above 50% before starting a manual firmware update. In UGOS Pro, go to Control Panel → Hardware & Power → UPS, open the firmware option, and select Manual Update.

Frequently Asked Questions

Which UPS works with UGREEN NAS?

Compatibility depends on the exact NAS and UPS model. US2000 supports DH2300, DH4300 Plus, DXP2800, and DXP2800 GT. US3000 supports DH2300, DH4300 Plus, DXP2800, DXP4800 Plus, DXP4800 Pro, and DXP480T Plus. Check the UGREEN NAS Compatibility List for third-party AC UPS models.

What is the difference between US2000 and US3000?

US2000 provides up to 72W with a 22.2Wh, 6000mAh battery. US3000 provides up to 120W with a 12000mAh battery and approximately 10 minutes of runtime in the listed usage scenario. Their supported NAS model lists are different, so choose by exact model rather than output alone.

Can DXP2800 use US2000?

Yes. US2000 is compatible with DXP2800 and DXP2800 GT, as well as DH2300 and DH4300 Plus.

Can DXP4800 Pro or DXP480T Plus use US3000?

Yes. Both DXP4800 Pro and DXP480T Plus are included in the confirmed US3000 compatibility list.

Can DXP6800 or DXP8800 series models use US3000?

No. US3000 is not compatible with the DXP6800 or DXP8800 series. Use the UGREEN NAS Compatibility List to find a tested AC UPS for the exact NAS model.

How long should a UPS run a NAS?

Runtime must exceed the configured waiting period, the time required for shutdown, and a safety reserve. US3000 provides approximately 10 minutes in the listed usage scenario. For a standard AC UPS, 10 to 15 minutes at the full protected load is a practical starting target.

Should the router and switch also use the UPS?

Yes, if network access or NUT-based shutdown communication must continue during the outage. A router or switch that loses power can disconnect slave NAS devices from the UPS host even while the NAS devices remain powered.

Does a UPS replace a NAS backup?

No. A UPS protects against power interruption; it does not protect against drive failure, accidental deletion, malware, theft, or physical damage. Keep at least one independent backup of important data.