Ubiquiti UPS

The Ubiquiti UPS-Tower (model: UPS-Tower) is a UniFi-managed, 1,000 VA / 600 W line-interactive uninterruptible power supply designed for network equipment, desktop workstations, and small server environments. It combines automatic voltage regulation (AVR), a hot-swappable lead-acid battery, and a built-in Ethernet management port — providing clean, protected power with native UniFi Alarm Manager integration and Network UPS Tools (NUT) support for automated graceful shutdown and real-time monitoring across both Ubiquiti and third-party systems.





Key Features of Ubiquiti UPS-Tower 1,000 VA / 600 W line-interactive UPS with automatic voltage regulation (AVR)
Five (5) battery backup & surge-protected C13 outlets and five (5) surge-only C13 outlets (10 total)
Hot-swappable 12V 9Ah sealed lead-acid battery — replaceable without powering down connected equipment
Runtime of approximately 7 minutes at half-load (300 W) and 2 minutes at full load (600 W)
Fast 6 ms typical (10 ms maximum) transfer time to battery power
Built-in Ethernet management port for network monitoring and control
Two (2) surge-protected 1GbE Ethernet passthrough ports
UniFi Alarm Manager integration with NUT support for third-party automated shutdowns
Cold start support — powers devices from battery with no utility power present
Supplied with UK (Type G) power cable




Product Overview Power Capacity and Runtime The UPS-Tower delivers 1,000 VA / 600 W of line-interactive power. At full load (600 W), the unit provides approximately 2 minutes of battery runtime. At half-load (300 W), runtime extends to approximately 7 minutes — giving connected equipment sufficient time to complete a graceful shutdown. When approximately 2 minutes of runtime remain, the unit automatically triggers a NUT shutdown signal regardless of current load.

Outlet Configuration Ten IEC C13 outlets are split into two groups: five battery-backed and surge-protected outlets for critical equipment (servers, switches, routers), and five surge-only outlets for secondary devices. All ten outlets provide surge protection.

Hot-Swappable Battery The 12V 9Ah sealed lead-acid battery is accessible from the front panel and can be swapped out while the UPS continues to supply power to connected devices. This eliminates downtime during routine battery replacement and simplifies ongoing maintenance.

UniFi Integration and NUT Support A dedicated Ethernet management port connects the UPS-Tower to UniFi Alarm Manager, providing real-time battery status, power event alerts, and monitoring within the UniFi console. Network UPS Tools (NUT) support extends compatibility to Linux, Windows, macOS, and BSD hosts, as well as third-party monitoring platforms such as Home Assistant, PRTG, and Zabbix — enabling automated shutdown workflows without proprietary software dependency.

Automatic Voltage Regulation (AVR) The built-in AVR corrects input voltage fluctuations between 170 V and 280 V without switching to battery. This reduces unnecessary battery cycling, preserves battery life, and protects connected equipment from under-voltage and over-voltage conditions common in many environments.

Cold Start and Graceful Shutdown Cold start mode allows the UPS-Tower to power devices directly from battery with no utility power present — useful for remote deployments or areas subject to extended outages. Graceful shutdown via NUT is triggered automatically when battery runtime falls to approximately 2 minutes.

Surge-Protected Ethernet Ports Two integrated 1GbE Ethernet passthrough ports provide surge protection on data lines as well as power lines, safeguarding downstream network hardware from voltage spikes originating on the network cable.

Overload and Short-Circuit Protection The UPS-Tower tolerates a 110% overload for up to 5 minutes before shutting down, and provides immediate protection cutoff at 120% overload. A built-in short-circuit breaker protects both the unit and connected equipment under fault conditions.





Technical Specifications Specification Detail ModelUPS-Tower TopologyLine-Interactive with AVR Capacity1,000 VA / 600 W Input Voltage Range (AVR)170 – 280 V (regulated without battery) Battery Type12V 9Ah sealed lead-acid (SLA), hot-swappable Runtime @ 300 W (half load)~7 minutes Runtime @ 600 W (full load)~2 minutes Transfer Time (to battery)6 ms typical / 10 ms maximum Outlets — Battery + Surge5 × IEC C13 Outlets — Surge Only5 × IEC C13 Total Outlets10 × IEC C13 Management Port1 × RJ45 Ethernet (built-in, UPS management) Ethernet Surge Ports2 × 1GbE surge-protected passthrough Management SoftwareUniFi Alarm Manager Third-Party ProtocolNUT (Network UPS Tools) Cold StartSupported Graceful Shutdown Trigger~2 minutes remaining runtime (via NUT) Overload Protection110% for up to 5 min; 120% immediate cutoff Short Circuit ProtectionBuilt-in circuit breaker Power Cable IncludedUK (Type G) Form FactorDesktop / Tower



Frequently Asked Questions How long does the UPS-Tower run on battery? At half-load (300 W) the UPS-Tower provides approximately 7 minutes of runtime. At full load (600 W), runtime is approximately 2 minutes. These figures are designed to allow a controlled graceful shutdown rather than extended operation during an outage.

Is the UPS-Tower compatible with UniFi Network? Yes. The UPS-Tower integrates with UniFi Alarm Manager via its built-in Ethernet port, providing real-time alerts and battery status in the UniFi console. It also supports NUT (Network UPS Tools) for use with non-Ubiquiti hosts and third-party monitoring platforms.

Can the battery be replaced without shutting down connected equipment? Yes. The front-panel hot-swap design allows the 12V 9Ah battery to be replaced while the UPS continues supplying power to connected devices, minimising maintenance downtime.

What outlets does the UPS-Tower have? The UPS-Tower has 10 IEC C13 outlets: 5 are battery-backed with surge protection, and 5 are surge-protected only. It also includes 2 surge-protected 1GbE Ethernet passthrough ports.

Does the UPS-Tower support NUT (Network UPS Tools)? Yes. NUT support enables automated graceful shutdown of Linux, Windows, macOS, and BSD systems, and integrates with platforms such as Home Assistant, PRTG, Zabbix, and other NUT-compatible monitoring tools.

What is the transfer time when mains power fails? The UPS-Tower switches to battery in 6 ms typically, with a 10 ms maximum — fast enough to maintain continuous operation for sensitive network and computing equipment.

Does the UPS-Tower support cold start? Yes. Cold start mode allows the UPS-Tower to power devices from battery with no utility power present, suitable for field deployments or areas subject to extended power outages.

The Ubiquiti UniFi UPS-2U Rackmount Uninterruptible Power Supply is a UniFi-managed 1.5 kVA, 2U rackmount UPS designed to deliver reliable backup power and network-aware monitoring for critical infrastructure. With a total output capacity of 1000 W, eight rear outlets, and a front-accessible hot-swappable battery, it integrates cleanly into UniFi environments while remaining compatible with third-party systems through NUT support.

Product Dimensions Key Features of Ubiquiti UniFi UPS-2U 1500 VA / 1000 W line-interactive UPS capacity
Eight total outlets: four battery backup & surge, four surge-only
Hot-swappable 12V 9Ah lead-acid battery (216 Wh)
Typical transfer time of 6 ms (10 ms maximum)
Built-in Ethernet port with UniFi management and NUT support
Two integrated 1 GbE surge-protected network ports
Overload and short-circuit protection
Includes UK power cable
Rackmount Form Factor Designed in a 2U rackmount chassis, the UniFi UPS-2U fits seamlessly into standard 19-inch racks, making it suitable for network cabinets and server rooms where space efficiency and clean cable management are important.

Power Capacity & Runtime The UPS provides a total output capacity of 1500 VA / 1000 W. At full load, it delivers approximately 2.3 minutes of runtime, while a half load of 500 W extends runtime to around 8 minutes, allowing connected equipment time to shut down safely or ride through brief outages.

Battery Backup & Surge Protection Four outlets supply both battery backup and surge protection for essential devices, while four additional surge-only outlets protect non-critical equipment. This layout allows prioritisation of connected hardware without external power strips.

Hot-Swappable Battery Design The front-panel accessible battery can be replaced while the unit remains installed, reducing maintenance time and avoiding disruption to connected equipment during battery servicing.

Network Management & Monitoring An integrated Ethernet port enables network-based monitoring and management through UniFi, with additional compatibility via Network UPS Tools (NUT) for third-party devices. The UPS can issue shutdown signals when battery voltage reaches a low threshold.

Overload Detection & Protection The UniFi UPS-2U reports overload conditions when the connected load exceeds 1000 W or when high inrush current is detected during device startup. Protection thresholds include 110% load for up to five minutes and immediate response at 120%.

Cold-Start & Automatic Voltage Regulation The unit supports cold-start operation, allowing it to power on from battery when utility power is unavailable. Built-in Automatic Voltage Regulation (AVR) stabilises minor voltage fluctuations between 170 V and 280 V without switching to battery mode.

Graceful Shutdown Behaviour When operating on battery, the UPS sends a graceful shutdown signal once approximately two minutes of runtime remain, regardless of load condition. This ensures connected systems receive consistent notification before power is depleted.

I/O Diagram