Compact line-interactive UPS for home offices and single workstations

The Tempo TMP850IEC is an 850VA / 480W line-interactive tower UPS designed by Uniti Power for home working, single desktop PCs, routers and other essential 230V electronics. Built-in automatic voltage regulation (AVR) corrects everyday mains dips and surges, three IEC 10A outlets supply the protected equipment, and one internal 12V 9Ah battery gives an estimated 20 minutes of backup at a 100W load.

In a home or small office, short sags and spikes are as much of a risk as complete power cuts. The TMP850IEC's boost and buck AVR raises a low incoming voltage or reduces a high one without drawing on the battery, which keeps the battery in reserve for real outages and reduces wear on it. When the mains fails, the load transfers to battery in a typical 2-6ms, giving you time to save work and shut down safely.

Where the TMP850IEC is used

At 100mm wide, the TMP850IEC fits neatly under a desk or beside a router. Typical uses include:

• Home office and remote working: a desktop PC and monitor, plus the modem or router that keeps the connection up.
• Security and connectivity: CCTV cameras, access control panels and small items of networking equipment.
• Compact point of sale: a POS terminal with its receipt printer or barcode scanner.

Key capabilities

• Wide input window: operates from 170-280V AC on a 230V nominal supply.
• Automatic voltage regulation: boost and buck AVR corrects low or high mains voltage without switching to battery.
• Fast transfer: a typical 2-6ms transfer to battery when the mains fails or moves outside the supported range.
• Battery output: stepped sine wave at 230V, with voltage regulated to +/-10% and frequency held to ±1Hz in battery mode, at 50Hz or 60Hz.
• Efficiency: 95% in line mode, 88% in AVR mode and 60% in battery mode.
• Protection: discharge, overcharge and overload protection, plus RJ11 surge protection for a modem or phone line.
• Cold start and auto restart: the UPS can be started from its battery when no mains is available, and restarts automatically when the mains returns.

Status display and alarms

The LCD shows input and output voltage, load level and battery charge, with flashing indicators in AVR mode, battery mode, overload and low battery. Each condition also has its own audible alarm:

Installation and first use

The TMP850IEC measures 100 x 143 x 290mm (W x H x D), weighs 5.2kg and runs at under 40dB. It takes an IEC C14 10A input lead to a nearby earthed wall socket, and operates at 0 to 40°C in a protected location with good airflow, away from damp, dust and direct sunlight.

Before first use, leave the UPS connected to the mains with no load attached for at least 4 hours; the user manual notes that at least 8 hours of charging is needed to reach the full rated backup time. Plug equipment directly into the UPS outlets rather than through a power strip or surge suppressor, and do not connect laser printers or other motor-driven devices, as their in-rush current can damage the unit.

Safe shutdown over USB

The USB port uses the HID power device standard, so the TMP850IEC works with the built-in power management in Windows, macOS and Linux to shut the computer down automatically during an extended outage. There is no expansion slot for a network management card.

Standards, warranty and support

The Tempo user manual lists the range as meeting IEC/EN 62040-1, IEC/EN 62040-2 and IEC/EN 62040-3. The TMP850IEC is a Category C2 UPS: in a residential environment it may cause radio interference, in which case additional measures may be needed.

Registered Tempo products in the UK carry a 6-year warranty on parts and 1 year on batteries. See warranty information for full terms, and register your UPS once it is installed. For setup questions, contact Uniti Power technical support.

Tempo TMP850IEC questions answered

Is the Tempo TMP850IEC an online UPS?
No. The TMP850IEC is a line-interactive UPS with AVR: it corrects routine voltage variation and transfers to battery in a typical 2-6ms when the mains fails. For online double conversion, see Uniti Power's Echo ECH1000RMi2U.

How much equipment can the TMP850IEC support?
Up to 480W. Its output power factor is 0.56, so check that the total watt consumption of the connected equipment is within 480W rather than sizing on the 850VA figure alone.

How long will the TMP850IEC run on battery?
An estimated 20 minutes at a 100W load from its internal 12V 9Ah battery. Higher loads give shorter backup times.

How long does the TMP850IEC take to recharge?
About 4 hours to reach 90% after a complete discharge.

How do I obtain the TMP850IEC?
Request a quote on this page, call 0845 561 0560, or find a Uniti Power partner near you.

Runtimes are typical values for new, fully charged batteries at 25°C, provided as a guide only. Actual runtime depends on battery age, temperature and the type of load.

Specifications are taken from the Tempo Range Datasheet (PDF). Installation and safety guidance is in the Tempo User Manual (PDF), and the full range is shown in the Tempo Range Brochure (PDF).