Top pick
APC
Back-UPS Pro 1500VA Tower
A reliable line-interactive UPS sized for a single workstation, monitor and small NAS.
Desktop PC: ~48 min
4.6 £150 – £220
4.8 From £3,200
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Eaton
9PX 6000VA Modular UPS
Enterprise-grade double-conversion UPS with modular, hot-swap batteries for server farms.
Output
5,400W
Battery
2,160Wh
Chemistry
Lead-acid
Can it run…?
Each device on its own, with typical UK wattages.
Wi-Fi router + fibre box
~3d 23h
Laptop
~1d 7h
Desktop PC
~11h 42m
NAS (2–4 bay)
~2d 6h
Gaming / workstation PC
~3h 28m
1U rack server
~5h 29m
Runtime estimatordrag to set your load
LOAD
—
RUNTIME
—
Key specs
Capacity6000VA / 5400W (scalable)
TopologyOnline double-conversion, modular
Form factor6U rack, parallel-capable
Runtime (half load)Extendable via external battery cabinets
Ideal forServer farms, colocation racks, small data centres
ExtrasHot-swap power/battery modules, EcoControl outlets
Our take
When downtime has a real cost, this is the class of UPS worth budgeting for. Modular power and battery cartridges can be swapped live, and units can be run in parallel for N+1 redundancy as a rack grows.
Why we like it
- Designed for N+1 redundancy across multiple units
- Granular, switched outlet groups for staged shutdowns
- Long service life when maintained under a support contract
Not sure it's big enough?
Power Sizer
Add your own devices and compare it against everything else.
Also in Desk & Servers
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CyberPower
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A 3000VA double-conversion UPS built for network cabinets and small server racks.
Desktop PC: ~3h 4m
4.5 £650 – £950
Tripp Lite
AVR750U Compact UPS
A budget-friendly UPS that protects a single PC, router and modem from brownouts.
Desktop PC: ~19 min
4.3 £60 – £90