An uninterruptable power supply, or UPS for short, acts as an emergency back-up power source in the event of a power outage, giving you enough time to safely shut down computers, servers, and other devices.
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Uninterruptable Power Supplies (90 products)
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APC Replacement Battery Cartridge #123 - UPS battery - 1 x Lead Acid
- Battery Enclosure Type: Internal
- Technology: Lead Acid
- Features: Spill proof
£ 99.48 inc. vat
£ 82.90 ex. vat
0% Interest offers available
APC Back-UPS 650VA - 230V - 8 x AC Power - 1 USB Charging Port
- 650 VA/400 W - Tower
- 2.60 Minute Stand-by
- 230 V AC
- Input - 220 V AC, 230 V AC
- Output - 1 x USB, 8 x AC Power
£ 108.48 inc. vat
£ 90.40 ex. vat
0% Interest offers available
APC Back-UPS Pro BR650MI - Line-Interactive UPS - 650 VA/390W - 6 x IEC 60320 C13
- Tower - AVR
- 12 Hour Recharge
- 230 V AC Input
- 230 V AC Output
£ 175.23 inc. vat
£ 146.02 ex. vat
0% Interest offers available
APC Back-UPS Standby UPS - 850VA/520W - Type-C And A Charging Ports
- 520W UPS
- 16 Hour Recharge
- 8 x AC Power
- runtime: 34.1 min at 100 Watts
- runtime: 14.3 min at 200 Watts
£ 123.99 inc. vat
£127.49save £3.50£ 103.32 ex. vat
£106.24save £2.920% Interest offers available
APC Replacement Battery Cartridge #113
- For UPS advice email [email protected]
- Lead Acid
- attery Form Factor: Internal
£ 61.98 inc. vat
£69.29save £7.31£ 51.65 ex. vat
£57.74save £6.09Eaton Ellipse ECO 800 USB IEC UPS 500 Watt Lead Acid
- For UPS advice email [email protected]
- Power Capacity: 500 Watt / 800 VA
- Input Voltage: AC 230 V
- Frequency Required: 50/60 Hz
£ 176.99 inc. vat
£ 147.49 ex. vat
0% Interest offers available
Eaton 3S850B - 3S Gen2 Desktop UPS Uninterruptible Power Supply (510W/850VA)
- Wall mounting
- Battery for easy replacement access
- Complete high end surge protection
- Backup power for up to 4 devices
£ 101.61 inc. vat
£122.76save £21.15£ 84.67 ex. vat
£102.30save £17.630% Interest offers available
Eaton 3S Mini 36W BS
- Ideal protection for single DC voltage powered device
- Up to 120min runtime
- Compact & attractive design
£ 47.25 inc. vat
£ 39.37 ex. vat
APC Back-UPS, 2200VA, Tower, 230V, 6x IEC C13 outlets, AVR
- 8 Hour Recharge
- 48 Second Stand-by
- 230 V AC Input
- 230 V AC Output
- 6 x IEC 60320 C13
£ 262.98 inc. vat
£ 219.15 ex. vat
0% Interest offers available
APC Smart - UPS 500 Watt / 750 VA
- UPS - Rack-mountable
- Rack Size: 2U
- 500 Watt
- 750 VA
£ 636.99 inc. vat
£ 530.82 ex. vat
0% Interest offers available
APC RBC17 Replacement Battery Cartridge
- For UPS advice email [email protected]
- Battery Cartridge
- Internal
- Lead Acid
£ 62.99 inc. vat
£68.99save £6.00£ 52.49 ex. vat
£57.49save £5.00APC Back-UPS BX Series BX750MI - UPS - 410 Watt - 750 VA
- UPS
- AC 230 V
- 410 Watt
- 750 VA
- 9 Ah
£ 94.97 inc. vat
£ 79.14 ex. vat
APC Replacement Battery Cartridge
- For UPS advice email [email protected]
- Maintenance-free sealed Lead-Acid battery with suspended...
- Battery Cartridge
- Battery mounting: Enclosed battery cabinet
£ 58.97 inc. vat
£ 49.14 ex. vat
APC RBC6 Replacement Battery Cartridge
- For UPS advice email [email protected]
- UPS Replacement Battery
- Lead Acid
£ 302.99 inc. vat
£ 252.49 ex. vat
0% Interest offers available
Ecoflow Delta 2 Bag
- The EcoFlow DELTA 2 Waterproof Bag maintains the DELTA 2’s ease of use...
£ 64.98 inc. vat
£ 54.15 ex. vat
APC Replacement Battery Cartridge #123 - UPS battery - 1 x Lead Acid
- Battery Enclosure Type: Internal
- Technology: Lead Acid
- Features: Spill proof
QuickFind: 283899
Mfr part code: APCRBC123
£ 99.48 inc. vat
£ 82.90 ex. vat
0% Interest offers available
APC Back-UPS 650VA - 230V - 8 x AC Power - 1 USB Charging Port
- 650 VA/400 W - Tower
- 2.60 Minute Stand-by
- 230 V AC
- Input - 220 V AC, 230 V AC
- Output - 1 x USB, 8 x AC Power
QuickFind: 965800
Mfr part code: BE650G2-UK
£ 108.48 inc. vat
£ 90.40 ex. vat
0% Interest offers available
APC Back-UPS Pro BR650MI - Line-Interactive UPS - 650 VA/390W - 6 x IEC 60320 C13
- Tower - AVR
- 12 Hour Recharge
- 230 V AC Input
- 230 V AC Output
QuickFind: 951014
Mfr part code: BR650MI
£ 175.23 inc. vat
£ 146.02 ex. vat
0% Interest offers available
APC Back-UPS Standby UPS - 850VA/520W - Type-C And A Charging Ports
- 520W UPS
- 16 Hour Recharge
- 8 x AC Power
- runtime: 34.1 min at 100 Watts
- runtime: 14.3 min at 200 Watts
QuickFind: 951015
Mfr part code: BE850G2-UK
£ 123.99 inc. vat
£127.49save £3.50£ 103.32 ex. vat
£106.24save £2.920% Interest offers available
APC Replacement Battery Cartridge #113
- For UPS advice email [email protected]
- Lead Acid
- attery Form Factor: Internal
QuickFind: 874151
Mfr part code: APCRBC113
£ 61.98 inc. vat
£69.29save £7.31£ 51.65 ex. vat
£57.74save £6.09Eaton Ellipse ECO 800 USB IEC UPS 500 Watt Lead Acid
- For UPS advice email [email protected]
- Power Capacity: 500 Watt / 800 VA
- Input Voltage: AC 230 V
- Frequency Required: 50/60 Hz
QuickFind: 454567
Mfr part code: EL800USBIEC
£ 176.99 inc. vat
£ 147.49 ex. vat
0% Interest offers available
Eaton 3S850B - 3S Gen2 Desktop UPS Uninterruptible Power Supply (510W/850VA)
- Wall mounting
- Battery for easy replacement access
- Complete high end surge protection
- Backup power for up to 4 devices
QuickFind: 1426179
Mfr part code: 3S850B
£ 101.61 inc. vat
£122.76save £21.15£ 84.67 ex. vat
£102.30save £17.630% Interest offers available
Eaton 3S Mini 36W BS
- Ideal protection for single DC voltage powered device
- Up to 120min runtime
- Compact & attractive design
QuickFind: 1287580
Mfr part code: 3SM36B
£ 47.25 inc. vat
£ 39.37 ex. vat
APC Back-UPS, 2200VA, Tower, 230V, 6x IEC C13 outlets, AVR
- 8 Hour Recharge
- 48 Second Stand-by
- 230 V AC Input
- 230 V AC Output
- 6 x IEC 60320 C13
QuickFind: 1145316
Mfr part code: BX2200MI
£ 262.98 inc. vat
£ 219.15 ex. vat
0% Interest offers available
APC Smart - UPS 500 Watt / 750 VA
- UPS - Rack-mountable
- Rack Size: 2U
- 500 Watt
- 750 VA
QuickFind: 868503
Mfr part code: SMT750RMI2UC
£ 636.99 inc. vat
£ 530.82 ex. vat
0% Interest offers available
APC RBC17 Replacement Battery Cartridge
- For UPS advice email [email protected]
- Battery Cartridge
- Internal
- Lead Acid
QuickFind: 85520
Mfr part code: RBC17
£ 62.99 inc. vat
£68.99save £6.00£ 52.49 ex. vat
£57.49save £5.00APC Back-UPS BX Series BX750MI - UPS - 410 Watt - 750 VA
- UPS
- AC 230 V
- 410 Watt
- 750 VA
- 9 Ah
QuickFind: 1286467
Mfr part code: BX750MI
£ 94.97 inc. vat
£ 79.14 ex. vat
APC Replacement Battery Cartridge
- For UPS advice email [email protected]
- Maintenance-free sealed Lead-Acid battery with suspended...
- Battery Cartridge
- Battery mounting: Enclosed battery cabinet
QuickFind: 206225
Mfr part code: RBC110
£ 58.97 inc. vat
£ 49.14 ex. vat
APC RBC6 Replacement Battery Cartridge
- For UPS advice email [email protected]
- UPS Replacement Battery
- Lead Acid
QuickFind: 2987
Mfr part code: RBC6
£ 302.99 inc. vat
£ 252.49 ex. vat
0% Interest offers available
Ecoflow Delta 2 Bag
- The EcoFlow DELTA 2 Waterproof Bag maintains the DELTA 2’s ease of use...
QuickFind: 1817925
Mfr part code: BMR330
£ 64.98 inc. vat
£ 54.15 ex. vat
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An uninterruptable power supply, or UPS for short, acts as an emergency back-up power source in the event of a power outage, giving you enough time to safely shut down computers, servers, and other devices.
What's an Uninterruptable Power Supply?
Put simply, you can think of an uninterruptable power supply as a big battery bank. When everything's working as normal, as UPS will pass power from the wall through to whatever's plugged into to, like an extension lead, all while charging its internal battery. If the power were to cut out for any reason, the UPS would then instantaneously swap over to battery power, ensuring that none of its device shut off unexpectedly. The most common devices to hook up to a UPS are non-battery-powered devices, such as desktops and servers, which can't weather a split-second power loss like, say, a laptop.
Why Do I Need an Uninterruptable Power Supply?
Uninterruptable power supplies are, for the most part, targeted at businesses. As you can imagine, even a momentary lapse of power can wreak havoc depending on the task at hand. In data centres, for example, UPSs are practically essential as the fallout from a server losing power could result in hardware failure and, in turn, irreversible data corruption.
That being said, it's not as if you can't use an uninterruptible power supply in the home. While a surge protector may protect your hardware from physical damage when there's a power cut, it won't give your devices the time to power off properly. This could cause an important document you were in the middle of working on, or even your device's entire operating system, to corrupt beyond repair. It's worth picking up a UPS for the same reason you'd back up your data to an external hard drive. You may not need a UPS 99% of the time, but when you do, it's a lifesaver.
What Should I Look For In an Uninterruptable Power Supply?
Capacity
Like any battery, the batteries of uninterruptible power supplies don't last forever. When the power goes out, a UPS will only be able to provide power to its connected devices for so long. You shouldn't expect to run a high-wattage computer off a UPS's battery for a whole days' worth of work. A UPS is very much an emergency back-up power source, one that'll buy you enough time to either get the power back online or save any important work and shut devices down in a safe, controlled manner.
The capacity of an uninterruptable power supply could mean the difference between only having a handful of minutes or a breezy half-hour to sort your power situation out. Of course, the runtime of a UPS's battery will depend on what's plugged into it. A UPS will last longer if it's only got to support a single low-powered computer and a basic monitor, for example. So, make sure to buy a UPS with a large enough capacity to support all your devices. It's recommended that the total power draw of your set-up shouldn't exceed more than 80% of a UPS's capacity. The extra headroom will help to account for transient power spikes and the like.
Form-Factor
There's two categories of UPS: tower and rack-mounted. Of the two, tower uninterruptable power supplies are the more user-friendly. They feature a free-standing design similar to a tower computer case. As a result, you don't need to install a tower UPS, it can just slide underneath your desk and sit right alongside your desktop. Plus, tower UPSs tend to feature a few more quality-of-life features compared to most standard rack-mounted UPSs, such as an LCD display to show how many minutes of charge the UPS's battery has got left. As the name implies, a rack-mounted UPS is installed in a rack cabinet, acting as an emergency back-up power source for servers and other rack-mounted devices.
Outlets
Also, you'll want to consider how many power outlets you need on your uninterruptable power supply. There's UPSs which boast stacks upon stacks of power outlets, ready to support a complete set-up. Small UPSs are also available, which are ideal for performing a single yet critical function. However, do note that on some models, not all the power outlets are connected to the battery. Rather, they're just surged-protected outlets. This allows the user to hook up non-essential peripherals and accessories, like a secondary monitor, without them draining the battery.
Uninterruptable Power Supplies at Ebuyer
Here at Ebuyer, we stock a wide range of both tower and rack-mounted uninterruptable power supplies from leading brands, including APC, Eaton, and more. You'll also find all the accessories you need to make the most of your UPS, from hot-swappable batteries to power distribution units. Spread the cost of your purchase with our flexible finance offers. And if you need your new UPS by tomorrow, next-day delivery is also available.