Top pick
CyberPower
OL3000 Rack/Tower UPS
A 3000VA double-conversion UPS built for network cabinets and small server racks.
Desktop PC: ~3h 4m
4.5 £650 – £950
Top pick
4.6 £150 – £220
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APC
Back-UPS Pro 1500VA Tower
A reliable line-interactive UPS sized for a single workstation, monitor and small NAS.
Output
900W
Battery
216Wh
Chemistry
Lead-acid
Can it run…?
Each device on its own, with typical UK wattages.
Wi-Fi router + fibre box
~8h 34m
Laptop
~2h 29m
Desktop PC
~48 min
NAS (2–4 bay)
~4h 37m
Gaming / workstation PC
~11 min
1U rack server
~19 min
Runtime estimatordrag to set your load
LOAD
—
RUNTIME
—
Key specs
Capacity1500VA / 900W
TopologyLine-interactive, AVR
Outlets10x UK/IEC (battery + surge)
Runtime (half load)Approx. 8–12 minutes
Ideal forPC + monitor + router/NAS
ExtrasUSB monitoring, auto shutdown software
Our take
This is the workhorse choice for a home office or a single critical workstation. It rides through brief outages instantly and gives automatic voltage regulation (AVR), so it corrects brownouts and surges without switching to battery — which means longer battery life over the years.
Why we like it
- Pure sine wave-friendly output suitable for most desktop PSUs
- Companion software can trigger a safe, unattended shutdown of the connected PC
- Replaceable, user-swappable battery cartridge
Note: runtimes and exact specs vary by model/region — always check the manufacturer listing linked below before you buy.
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Also in Desk & Servers
You might also consider
Eaton
9PX 6000VA Modular UPS
Enterprise-grade double-conversion UPS with modular, hot-swap batteries for server farms.
Desktop PC: ~11h 42m
4.8 From £3,200
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