Uninterruptible Power Supply Eaton 3P Ellipse 900, Standby (Offline) 0.9 kVA / 540 W, 4 AC outlets, USB-A/USB-C, 9 Ah battery

Eaton 3P Ellipse 900 is a compact tower standby (offline) uninterruptible power supply that delivers 0.9 kVA / 540 W of backup power for small office and home equipment. The unit provides four AC outlets and both USB-A and USB-C ports for charging or powering peripheral devices. Equipped with a 12 V 9 Ah battery and an LED display, this UPS guards against power interruptions, voltage dips and surges while allowing an orderly shutdown of connected devices.

Advantages

The UPS offers reliable standby protection in a small form factor, combining mains surge protection and battery backup to maintain device availability during short power outages. Its multiple AC outlets and USB Type-A/Type-C ports allow simultaneous connection of computing and mobile devices. The LED display gives clear status information, and the lightweight tower design simplifies placement in home or small office environments.

Suitable for

• Desktop PCs and workstations that require safe shutdown during outages
• Home office equipment such as routers, modems and VoIP phones
• External hard drives and NAS devices for short-term power protection
• Charging and powering mobile devices via USB-A and USB-C ports

Key specifications

• Output power capacity: 0.9 kVA
• Output power: 540 W
• Topology: Standby (offline)
• Waveform: Stepwise approximation of sine wave
• AC outlets: 4 sockets (C14 coupler)
• Battery: 12 V, 9 Ah
• Front panel: LED status display
• Colour: Black
• Weight: 4.4 kg
• USB ports: USB Type-A and USB Type-C available for peripheral charging

How to use

Place the Eaton 3P Ellipse 900 on a stable, level surface with adequate ventilation and connect your critical devices to the unit's AC outlets. Plug the UPS into a grounded mains outlet and allow the internal battery to charge before relying on backup power. Use the LED display to monitor mains status, battery level and fault indicators. For safe shutdown during extended outages, save work on connected computers and follow operating-system shutdown procedures; the UPS will provide temporary runtime to complete these steps.

Recommendations

To maximize battery life, maintain the device in a temperature-controlled environment and avoid repeated deep discharges. Periodically test the UPS by simulating a mains failure and replace the battery according to the manufacturer's maintenance schedule or when runtime noticeably decreases.