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
Top pick
4.5 £650 – £950
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CyberPower
OL3000 Rack/Tower UPS
A 3000VA double-conversion UPS built for network cabinets and small server racks.
Output
2,700W
Battery
648Wh
Chemistry
Lead-acid
Can it run…?
Each device on its own, with typical UK wattages.
Wi-Fi router + fibre box
~1d 4h
Laptop
~8h 34m
Desktop PC
~3h 4m
NAS (2–4 bay)
~15h 18m
Gaming / workstation PC
~48 min
1U rack server
~1h 20m
Runtime estimatordrag to set your load
LOAD
—
RUNTIME
—
Key specs
Capacity3000VA / 2700W
TopologyOnline double-conversion
Form factor2U rack or tower, rail kit included
Runtime (half load)Approx. 10–15 minutes (extendable with battery packs)
Ideal forSmall server rack, network cabinet
ExtrasHot-swappable batteries, SNMP-ready
Our take
Double-conversion (online) topology means your servers always run off the battery/inverter, isolated from raw mains — so switchover time is effectively zero, which matters far more once you're protecting shared infrastructure rather than a single desktop.
Why we like it
- Hot-swappable batteries mean maintenance without downtime
- Optional SNMP/network card for remote monitoring and alerts
- Rack rails and tower feet both included
Not sure it's big enough?
Power Sizer
Add your own devices and compare it against everything else.
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