UPS Uninterruptible Power Supplies

An uninterruptible power supply, commonly known as UPS Power Supply is easy to install a device that is designed to provide power to your computers, servers, server rooms and data centres in case of main energy failure, electrical surge or unexpected energy cut off. These devices contain a battery that guarantees power to your computer system for a certain period of time, creating an extended run long enough to shutdown software or for saving the current task and shutting off the computer. For further reading, see our complete guide to uninterruptible power supplies (UPS)

UPS Uninterruptible Power Supply Types?

There are several types of UPS system solutions available:

  • Online UPS - A system of supplying power by converting AC input (utility power) to DC and reconverting it to stable AC by the inverter while constantly charging the batteries. Supplies power without momentary power breaks in the event of a power outage.
  • Standby UPS - A system where, normally AC input (utility power) is output as is to connected devices and when a power outage or abnormal voltage is detected, inverter starts feeding using power from the batteries. In the event of a power outage, a few milliseconds of momentary break occurs in AC output.
  • Parallel processing UPS - While power from AC input (utility power) is supplied, the bidirectional inverter connected in parallel corrects voltage and absorbs noise. Because this is the online inverter (parallel) system, it has both high efficiency and high reliability.
  • Hybrid UPS - This system consists of three modes: double conversion mode, economy mode, and active filter mode. The UPS automatically selects the power feeding mode to best suit the power situation and load conditions. It is possible to shift between the respective modes with no momentary break in output voltage. Double conversion mode is selected when the power situation is poor and economy mode is selected when the power situation is good.

How to choose the right UPS device

A UPS power supply may vary in the backup time, size, numbers and type of communication ports.


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Description Price Model Power Rating Input Voltage VA Rating Output Voltage Mounting Type Backup Time Network Compatibility Current Rating Number of Outlets Type Length Width Depth
RS Stock No. 459-819
Mfr. Part No.IDG 800/RS
BrandRiello
£78.26
Each
Units
iDialog 480W 220 → 240V ac 800VA 230V Stand Alone - - - 4 Line Interactive, Offline 192mm 90mm 232mm
RS Stock No. 689-9073
Mfr. Part No.BK650EI
BrandAPC
£153.60
Each
Units
Back-UPS CS 400W 180 → 266V 650VA 230V Stand Alone - - 7A 6 Offline 165mm 91mm 284mm
RS Stock No. 689-9070
Mfr. Part No.BK500EI
BrandAPC
£129.99
Each
Units
Back-UPS CS 300W 180 → 266V 500VA 230V Stand Alone - - 7A 6 Offline 165mm 91mm 284mm
RS Stock No. 459-815
Mfr. Part No.IDG 600/RS
BrandRiello
£64.05
Each
Units
iDialog 360W 220 → 240V ac 600VA 230V Stand Alone - - - 4 Line Interactive, Offline 192mm 90mm 232mm
RS Stock No. 779-3838
Mfr. Part No.BE400-UK
BrandAPC
£98.74
Each
Units
Back-UPS ES 240W 230V 400VA 230V Wall Mount 5min - - 8 Standby 230mm 86mm 285mm
RS Stock No. 768-8767
Mfr. Part No.IDG 1200
BrandRiello
£154.92
Each
Units
iDialog Plus 720W 220 → 240V ac 1200VA 230V Stand Alone - - - 6 Offline 275mm 97mm 315mm
RS Stock No. 459-825
Mfr. Part No.IDG 400/RS
BrandRiello
£62.79
Each
Units
iDialog 240W 220 → 240V ac 400VA 230V Stand Alone - - - 4 Line Interactive, Offline 192mm 90mm 232mm
RS Stock No. 779-3831
Mfr. Part No.BE325-UK
BrandAPC
£98.73
Each
Units
Back-UPS ES 185W 230V 325VA 230V Wall Mount 1min - - 4 Standby 360mm 115mm 95mm
RS Stock No. 768-8761
Mfr. Part No.IDG 1600
BrandRiello
£203.28
Each
Units
iDialog Plus 960W 220 → 240V ac 1600VA 230V Stand Alone - - - 6 Offline 275mm 97mm 315mm
RS Stock No. 689-9086
Mfr. Part No.BE700G-UK
BrandAPC
£119.99
Each
Units
Power-Saving Back-UPS ES 405W 180 → 266V 700VA 230V Stand Alone - - 10A 8 Offline 89mm 244mm 311mm
RS Stock No. 745-1880
Mfr. Part No.EL1200USBIEC
BrandEaton
£264.27
Each
Units
Eaton Ellipse ECO 750W 161 → 284V 1200VA 230V Rack Mount, Stand Alone - - - 8 Offline 305mm 81mm 312mm
RS Stock No. 779-3825
Mfr. Part No.BK350EI
BrandAPC
£109.70
Each
Units
Back-UPS CS 210W 230V 350VA 230V Stand Alone 9min - 7A 6 Standby 91mm 165mm 284mm
RS Stock No. 745-1887
Mfr. Part No.EL800USBIEC
BrandEaton
£181.84
Each
Units
Eaton Ellipse ECO 500W 161 → 284V 800VA 230V Rack Mount, Stand Alone - - - 4 Offline 263mm 81mm 235mm
RS Stock No. 745-1884
Mfr. Part No.EL1600USBIEC
BrandEaton
£329.62
Each
Units
Eaton Ellipse ECO 1kW 161 → 284V 1600VA 230V Rack Mount, Stand Alone - - - 8 Offline 305mm 81mm 312mm
RS Stock No. 745-1871
Mfr. Part No.EL500IEC
BrandEaton
£118.50
Each
Units
Eaton Ellipse ECO 300W 161 → 284V 500VA 230V Rack Mount, Stand Alone - - - 4 Offline 263mm 81mm 235mm
RS Stock No. 779-3813
Mfr. Part No.BH500INET
BrandAPC
£186.48
Each
Units
Back-UPS HS 300W 230V 500VA 230V Wall Mount 3min - 4A 6 Standby 225mm 372mm 105mm
RS Stock No. 745-1878
Mfr. Part No.EL650USBIEC
BrandEaton
£149.57
Each
Units
Eaton Ellipse ECO 400W 161 → 284V 650VA 230V Rack Mount, Stand Alone - - - 4 Offline 263mm 81mm 235mm
RS Stock No. 768-8745
Mfr. Part No.IPG 800 UK
BrandRiello
£107.72
Each
Units
iPlug 480W 220 → 240V ac 800VA 230V Stand Alone - - - 8 Offline 99mm 175mm 213mm
RS Stock No. 745-1874
Mfr. Part No.EL650IEC
BrandEaton
£126.80
Each
Units
Eaton Ellipse ECO 400W 161 → 284V 650VA 230V Rack Mount, Stand Alone - - - 4 Offline 263mm 81mm 235mm
RS Stock No. 768-8758
Mfr. Part No.IPLUG 80
BrandRiello
£107.74
Each
Units
iPlug 480W 220 → 240V ac 800VA 230V Stand Alone - - - 8 Offline 99mm 175mm 213mm