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APAXON

UPS

Power protection sized on watts, not marketing VA.

  • Line-interactive for offices and small server rooms
  • Online double-conversion where power quality is genuinely poor
  • Extended battery packs and network management cards in stock

Need to ride out an outage rather than shut down gracefully? Let's talk sizing.

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Next-working-day delivery. Order before 17:30 (England & Wales) or 16:00 (Northern Ireland, Republic of Ireland, Scotland) to receive next-working-day delivery. Orders placed before 17:30 Friday are delivered Monday; after 17:30 Friday arrive Tuesday. Upgrades — pre-9, pre-10:30, pre-noon, special and secure bulk — available at extra cost.

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133 products
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APC Smart-UPS SMT750IC
P/N 4913063SKU SMT750ICBrand APC

APC Smart-UPS SMT750IC UPS AC 220/230/240 V 500 Watt 750 VA RS-232, USB output connectors: 6 black with APC SmartConnect Weight: 13.58 KG

Available68 in stock
GBP£364.73
Eaton 5S 550i
P/N 7040303SKU 5S550IBSBrand EATON

Eaton 5S 550i UPS AC 220/230/240 V 330 Watt 550 VA 1-phase 5 Ah USB output connectors: 4 black Weight: 5.98 KG

Available63 in stock
GBP£91.25
Eaton 5SC 750i
P/N 7040310SKU 5SC750IBSBrand EATON

Eaton 5SC 750i UPS AC 220/230/240 V 525 Watt 750 VA 1-phase 7 Ah RS-232, USB output connectors: 6 black Weight: 11.86 KG

Available17 in stock
GBP£277.96
Eaton 5PX G2
P/N 6996530SKU 5PX3000IRTNG2BSBrand EATON

Eaton 5PX G2 Netpack UPS (rack-mountable / external) AC 200/208/220/230/240 V 3000 Watt 3000 VA 1-phase 9 Ah RS-232, USB, Ethernet 10/100/1000 output connectors: 10 2U black, silver Weight: 39.30 KG

Available15 in stock
GBP£2,126.04
APC Back-UPS 350, 230V
P/N 608048SKU BK350EIBrand APC

APC Back-UPS 350, 230V

Available15 in stock
GBP£108.71
APC Smart-UPS SC 450VA
P/N 1074725SKU SC450RMI1UBrand APC

APC Smart-UPS SC 450VA 230V 1U Rackmount/Tower Weight: 12.96 KG

Available15 in stock
GBP£297.38
APC Smart-UPS 1500VA LCD RM
P/N 4704930SKU SMT1500RMI2UCBrand APC

APC Smart-UPS 1500VA LCD RM UPS (rack-mountable) AC 220/230/240 V 1000 Watt 1500 VA RS-232, USB output connectors: 4 2U black with APC SmartConnect for P/N: AR106V, AR106VI, AR112SH6, AR3006, AR3006SP, AR3103, AR3103SP, AR3106, AR3106SP Weight: 34.40 KG

Available13 in stock
GBP£951.61
Eaton 5PX G2
P/N 6996531SKU 5PX1500IRT2UG2BSBrand EATON

Eaton 5PX G2 UPS (rack-mountable / external) AC 150 294 V 1500 Watt 1500 VA 1-phase 9 Ah RS-232, USB, Ethernet 10/100/1000 output connectors: 8 2U black, silver Weight: 28.26 KG

Available13 in stock
GBP£1,020.59
Eaton 5PX G2 - Netpack - UPS (rack-mountable / external)
P/N 6996526SKU 5PX2200IRTNG2BSBrand EATON

Eaton 5PX G2 Netpack UPS (rack-mountable / external) AC 150 294 V 2200 Watt 2200 VA 1-phase 7 Ah RS-232, USB, Ethernet 10/100/1000 output connectors: 10 2U black, silver Weight: 35.68 KG

Available12 in stock
GBP£1,467.10
APC Back-UPS 500, 230V
P/N 608049SKU BK500EIBrand APC

APC Back-UPS 500, 230V Weight: 6.70 KG

Available11 in stock
GBP£128.18

UPS by what it's protecting

Desks & single workstations

500–1500VA line-interactive units give enough runtime for a clean shutdown and ride out brownouts.

Network cabinets

Rack-mount 1–3kVA with network management cards for remote monitoring and scheduled shutdown.

Server rooms

Online double-conversion above 3kVA — zero transfer time and full waveform conditioning for sensitive kit.

Sizing a UPS

Quick guidance to help you choose the right specification with confidence.

Watts not VA

A 1500VA unit typically delivers around 900W. Size to 70–80% of the wattage so batteries aren't at their limit.

Topology

Line-interactive for most offices. Online double-conversion for sensitive equipment or poor mains.

Runtime

Most units give 5–10 minutes at full load — enough for graceful shutdown, not for riding out an outage.

Form factor

Tower for under desks and open floors. Rack-mount where cabinet U space allows.

Management

A network card gives SNMP monitoring and scheduled shutdown across multiple servers.

Batteries

Expect replacement every 3–5 years. Check the modules are user-serviceable.

If you need to stay up rather than shut down, you're sizing for extended packs or a generator.

Popular ups brands

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3 brands in stock

Why organisations buy from Apaxon®

Built for business customers who care about reliability, value and support.

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UK stock on eligible items with quick dispatch options to keep your projects moving.
Fleet & project support
From one-off purchases to multi-device rollouts — we help standardise and recommend suitable SKUs.
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Leading global manufacturers with business-grade warranties and long lifecycle options.

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About

Sizing and specifying uninterruptible power

Size on watts, not VA. Manufacturers headline the VA rating because it's the larger number, but the real constraint is the wattage your load draws. A 1500VA unit typically delivers around 900W, so size to 70–80% of that for headroom.

Line-interactive suits most office and small server-room loads: it corrects minor voltage sag and switches to battery in a few milliseconds. Online double-conversion runs everything through the inverter continuously, giving zero transfer time and full waveform conditioning — worth it for sensitive equipment or where the mains supply is genuinely poor.

Runtime is the easiest thing to under-specify. Most units give 5–10 minutes at full load, which is enough for a graceful shutdown but not for riding out an outage. If you need to stay up, you're sizing for extended battery packs or a generator.

UPS — common questions

How do I size a UPS correctly?

Size on watts rather than VA. A 1500VA unit typically delivers around 900W, and you should load it to no more than 70–80% of that so the batteries aren't working at their limit.

What is the difference between line-interactive and online UPS?

Line-interactive corrects minor voltage variation and switches to battery in a few milliseconds, which suits most offices. Online double-conversion runs power through the inverter continuously, giving zero transfer time and full conditioning for sensitive equipment.

How long will a UPS keep equipment running?

Most units provide 5–10 minutes at full load, designed for a graceful shutdown rather than riding out an outage. Extended battery packs are available where longer runtime is required.

Brand Ecosystem

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